[PULL 00/44] target-arm queue

[PULL 00/44] target-arm queue

[Peter Maydell]

First set of arm patches for 6.2. I have a lot more in my
to-review queue still...

-- PMM

The following changes since commit d42685765653ec155fdf60910662f8830bdb2cef:

  Open 6.2 development tree (2021-08-25 10:25:12 +0100)

are available in the Git repository at:

  https://git.linaro.org/people/pmaydell/qemu-arm.git tags/pull-target-arm-20210825

for you to fetch changes up to 24b1a6aa43615be22c7ee66bd68ec5675f6a6a9a:

  docs: Document how to use gdb with unix sockets (2021-08-25 10:48:51 +0100)

----------------------------------------------------------------
target-arm queue:
 * More MVE emulation work
 * Implement M-profile trapping on division by zero
 * kvm: use RCU_READ_LOCK_GUARD() in kvm_arch_fixup_msi_route()
 * hw/char/pl011: add support for sending break
 * fsl-imx6ul: Instantiate SAI1/2/3 and ASRC as unimplemented devices
 * hw/dma/pl330: Add memory region to replace default
 * sbsa-ref: Rename SBSA_GWDT enum value
 * fsl-imx7: Instantiate SAI1/2/3 as unimplemented devices
 * docs: Document how to use gdb with unix sockets

----------------------------------------------------------------
Eduardo Habkost (1):
      sbsa-ref: Rename SBSA_GWDT enum value

Guenter Roeck (2):
      fsl-imx6ul: Instantiate SAI1/2/3 and ASRC as unimplemented devices
      fsl-imx7: Instantiate SAI1/2/3 as unimplemented devices

Hamza Mahfooz (1):
      target/arm: kvm: use RCU_READ_LOCK_GUARD() in kvm_arch_fixup_msi_route()

Jan Luebbe (1):
      hw/char/pl011: add support for sending break

Peter Maydell (37):
      target/arm: Note that we handle VMOVL as a special case of VSHLL
      target/arm: Print MVE VPR in CPU dumps
      target/arm: Fix MVE VSLI by 0 and VSRI by <dt>
      target/arm: Fix signed VADDV
      target/arm: Fix mask handling for MVE narrowing operations
      target/arm: Fix 48-bit saturating shifts
      target/arm: Fix MVE 48-bit SQRSHRL for small right shifts
      target/arm: Fix calculation of LTP mask when LR is 0
      target/arm: Factor out mve_eci_mask()
      target/arm: Fix VPT advance when ECI is non-zero
      target/arm: Fix VLDRB/H/W for predicated elements
      target/arm: Implement MVE VMULL (polynomial)
      target/arm: Implement MVE incrementing/decrementing dup insns
      target/arm: Factor out gen_vpst()
      target/arm: Implement MVE integer vector comparisons
      target/arm: Implement MVE integer vector-vs-scalar comparisons
      target/arm: Implement MVE VPSEL
      target/arm: Implement MVE VMLAS
      target/arm: Implement MVE shift-by-scalar
      target/arm: Move 'x' and 'a' bit definitions into vmlaldav formats
      target/arm: Implement MVE integer min/max across vector
      target/arm: Implement MVE VABAV
      target/arm: Implement MVE narrowing moves
      target/arm: Rename MVEGenDualAccOpFn to MVEGenLongDualAccOpFn
      target/arm: Implement MVE VMLADAV and VMLSLDAV
      target/arm: Implement MVE VMLA
      target/arm: Implement MVE saturating doubling multiply accumulates
      target/arm: Implement MVE VQABS, VQNEG
      target/arm: Implement MVE VMAXA, VMINA
      target/arm: Implement MVE VMOV to/from 2 general-purpose registers
      target/arm: Implement MVE VPNOT
      target/arm: Implement MVE VCTP
      target/arm: Implement MVE scatter-gather insns
      target/arm: Implement MVE scatter-gather immediate forms
      target/arm: Implement MVE interleaving loads/stores
      target/arm: Re-indent sdiv and udiv helpers
      target/arm: Implement M-profile trapping on division by zero

Sebastian Meyer (1):
      docs: Document how to use gdb with unix sockets

Wen, Jianxian (1):
      hw/dma/pl330: Add memory region to replace default

 docs/system/gdb.rst        |   26 +-
 include/hw/arm/fsl-imx7.h  |    5 +
 target/arm/cpu.h           |    1 +
 target/arm/helper-mve.h    |  283 ++++++++++
 target/arm/helper.h        |    4 +-
 target/arm/translate-a32.h |    2 +
 target/arm/vec_internal.h  |   11 +
 target/arm/mve.decode      |  226 +++++++-
 target/arm/t32.decode      |    1 +
 hw/arm/exynos4210.c        |    3 +
 hw/arm/fsl-imx6ul.c        |   12 +
 hw/arm/fsl-imx7.c          |    7 +
 hw/arm/sbsa-ref.c          |    6 +-
 hw/arm/xilinx_zynq.c       |    3 +
 hw/char/pl011.c            |    6 +
 hw/dma/pl330.c             |   26 +-
 target/arm/cpu.c           |    3 +
 target/arm/helper.c        |   34 +-
 target/arm/kvm.c           |   17 +-
 target/arm/m_helper.c      |    4 +
 target/arm/mve_helper.c    | 1254 ++++++++++++++++++++++++++++++++++++++++++--
 target/arm/translate-mve.c |  877 ++++++++++++++++++++++++++++++-
 target/arm/translate-vfp.c |    2 +-
 target/arm/translate.c     |   37 +-
 target/arm/vec_helper.c    |   14 +-
 25 files changed, 2746 insertions(+), 118 deletions(-)

[PULL 01/44] target/arm: Note that we handle VMOVL as a special case of VSHLL

[Peter Maydell]

Although the architecture doesn't define it as an alias, VMOVL
(vector move long) is encoded as a VSHLL with a zero shift.
Add a comment in the decode file noting that we handle VMOVL
as part of VSHLL.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/mve.decode | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index 595d97568eb..fa9d921f933 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -364,6 +364,8 @@ VRSHRI_U          111 1 1111 1 . ... ... ... 0 0010 0 1 . 1 ... 0 @2_shr_h
 VRSHRI_U          111 1 1111 1 . ... ... ... 0 0010 0 1 . 1 ... 0 @2_shr_w
 
 # VSHLL T1 encoding; the T2 VSHLL encoding is elsewhere in this file
+# Note that VMOVL is encoded as "VSHLL with a zero shift count"; we
+# implement it that way rather than special-casing it in the decode.
 VSHLL_BS          111 0 1110 1 . 1 .. ... ... 0 1111 0 1 . 0 ... 0 @2_shll_b
 VSHLL_BS          111 0 1110 1 . 1 .. ... ... 0 1111 0 1 . 0 ... 0 @2_shll_h
 
-- 
2.20.1

[PULL 02/44] target/arm: Print MVE VPR in CPU dumps

[Peter Maydell]

Include the MVE VPR register value in the CPU dumps produced by
arm_cpu_dump_state() if we are printing FPU information. This
makes it easier to interpret debug logs when predication is
active.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/cpu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 2866dd76588..a82e39dd97f 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -1017,6 +1017,9 @@ static void arm_cpu_dump_state(CPUState *cs, FILE *f, int flags)
                          i, v);
         }
         qemu_fprintf(f, "FPSCR: %08x\n", vfp_get_fpscr(env));
+        if (cpu_isar_feature(aa32_mve, cpu)) {
+            qemu_fprintf(f, "VPR: %08x\n", env->v7m.vpr);
+        }
     }
 }
 
-- 
2.20.1

[PULL 03/44] target/arm: Fix MVE VSLI by 0 and VSRI by <dt>

[Peter Maydell]

In the MVE shift-and-insert insns, we special case VSLI by 0
and VSRI by <dt>. VSRI by <dt> means "don't update the destination",
which is what we've implemented. However VSLI by 0 is "set
destination to the input", so we don't want to use the same
special-casing that we do for VSRI by <dt>.

Since the generic logic gives the right answer for a shift
by 0, just use that.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/mve_helper.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index db5d6220854..f14fa914b68 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -1279,11 +1279,12 @@ DO_2SHIFT_S(vrshli_s, DO_VRSHLS)
         uint16_t mask;                                                  \
         uint64_t shiftmask;                                             \
         unsigned e;                                                     \
-        if (shift == 0 || shift == ESIZE * 8) {                         \
+        if (shift == ESIZE * 8) {                                       \
             /*                                                          \
-             * Only VSLI can shift by 0; only VSRI can shift by <dt>.   \
-             * The generic logic would give the right answer for 0 but  \
-             * fails for <dt>.                                          \
+             * Only VSRI can shift by <dt>; it should mean "don't       \
+             * update the destination". The generic logic can't handle  \
+             * this because it would try to shift by an out-of-range    \
+             * amount, so special case it here.                         \
              */                                                         \
             goto done;                                                  \
         }                                                               \
-- 
2.20.1

[PULL 04/44] target/arm: Fix signed VADDV

[Peter Maydell]

A cut-and-paste error meant we handled signed VADDV like
unsigned VADDV; fix the type used.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/mve_helper.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index f14fa914b68..82151b06200 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -1182,9 +1182,9 @@ DO_LDAVH(vrmlsldavhxsw, int32_t, int64_t, true, true)
         return ra;                                              \
     }                                                           \
 
-DO_VADDV(vaddvsb, 1, uint8_t)
-DO_VADDV(vaddvsh, 2, uint16_t)
-DO_VADDV(vaddvsw, 4, uint32_t)
+DO_VADDV(vaddvsb, 1, int8_t)
+DO_VADDV(vaddvsh, 2, int16_t)
+DO_VADDV(vaddvsw, 4, int32_t)
 DO_VADDV(vaddvub, 1, uint8_t)
 DO_VADDV(vaddvuh, 2, uint16_t)
 DO_VADDV(vaddvuw, 4, uint32_t)
-- 
2.20.1

[PULL 05/44] target/arm: Fix mask handling for MVE narrowing operations

[Peter Maydell]

In the MVE helpers for the narrowing operations (DO_VSHRN and
DO_VSHRN_SAT) we were using the wrong bits of the predicate mask for
the 'top' versions of the insn.  This is because the loop works over
the double-sized input elements and shifts the predicate mask by that
many bits each time, but when we write out the half-sized output we
must look at the mask bits for whichever half of the element we are
writing to.

Correct this by shifting the whole mask right by ESIZE bits for the
'top' insns.  This allows us also to simplify the saturation bit
checking (where we had noticed that we needed to look at a different
mask bit for the 'top' insn.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/mve_helper.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index 82151b06200..847ef5156ad 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -1358,6 +1358,7 @@ DO_VSHLL_ALL(vshllt, true)
         TYPE *d = vd;                                           \
         uint16_t mask = mve_element_mask(env);                  \
         unsigned le;                                            \
+        mask >>= ESIZE * TOP;                                   \
         for (le = 0; le < 16 / LESIZE; le++, mask >>= LESIZE) { \
             TYPE r = FN(m[H##LESIZE(le)], shift);               \
             mergemask(&d[H##ESIZE(le * 2 + TOP)], r, mask);     \
@@ -1419,11 +1420,12 @@ static inline int32_t do_sat_bhs(int64_t val, int64_t min, int64_t max,
         uint16_t mask = mve_element_mask(env);                  \
         bool qc = false;                                        \
         unsigned le;                                            \
+        mask >>= ESIZE * TOP;                                   \
         for (le = 0; le < 16 / LESIZE; le++, mask >>= LESIZE) { \
             bool sat = false;                                   \
             TYPE r = FN(m[H##LESIZE(le)], shift, &sat);         \
             mergemask(&d[H##ESIZE(le * 2 + TOP)], r, mask);     \
-            qc |= sat && (mask & 1 << (TOP * ESIZE));           \
+            qc |= sat & mask & 1;                               \
         }                                                       \
         if (qc) {                                               \
             env->vfp.qc[0] = qc;                                \
-- 
2.20.1

[PULL 06/44] target/arm: Fix 48-bit saturating shifts

[Peter Maydell]

In do_sqrshl48_d() and do_uqrshl48_d() we got some of the edge
cases wrong and failed to saturate correctly:

(1) In do_sqrshl48_d() we used the same code that do_shrshl_bhs()
does to obtain the saturated most-negative and most-positive 48-bit
signed values for the large-shift-left case.  This gives (1 << 47)
for saturate-to-most-negative, but we weren't sign-extending this
value to the 64-bit output as the pseudocode requires.

(2) For left shifts by less than 48, we copied the "8/16 bit" code
from do_sqrshl_bhs() and do_uqrshl_bhs().  This doesn't do the right
thing because it assumes the C type we're working with is at least
twice the number of bits we're saturating to (so that a shift left by
bits-1 can't shift anything off the top of the value).  This isn't
true for bits == 48, so we would incorrectly return 0 rather than the
most-positive value for situations like "shift (1 << 44) right by
20".  Instead check for saturation by doing the shift and signextend
and then testing whether shifting back left again gives the original
value.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/mve_helper.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index 847ef5156ad..5730b48f35e 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -1576,9 +1576,8 @@ static inline int64_t do_sqrshl48_d(int64_t src, int64_t shift,
         }
         return src >> -shift;
     } else if (shift < 48) {
-        int64_t val = src << shift;
-        int64_t extval = sextract64(val, 0, 48);
-        if (!sat || val == extval) {
+        int64_t extval = sextract64(src << shift, 0, 48);
+        if (!sat || src == (extval >> shift)) {
             return extval;
         }
     } else if (!sat || src == 0) {
@@ -1586,7 +1585,7 @@ static inline int64_t do_sqrshl48_d(int64_t src, int64_t shift,
     }
 
     *sat = 1;
-    return (1ULL << 47) - (src >= 0);
+    return src >= 0 ? MAKE_64BIT_MASK(0, 47) : MAKE_64BIT_MASK(47, 17);
 }
 
 /* Operate on 64-bit values, but saturate at 48 bits */
@@ -1609,9 +1608,8 @@ static inline uint64_t do_uqrshl48_d(uint64_t src, int64_t shift,
             return extval;
         }
     } else if (shift < 48) {
-        uint64_t val = src << shift;
-        uint64_t extval = extract64(val, 0, 48);
-        if (!sat || val == extval) {
+        uint64_t extval = extract64(src << shift, 0, 48);
+        if (!sat || src == (extval >> shift)) {
             return extval;
         }
     } else if (!sat || src == 0) {
-- 
2.20.1

[PULL 07/44] target/arm: Fix MVE 48-bit SQRSHRL for small right shifts

[Peter Maydell]

We got an edge case wrong in the 48-bit SQRSHRL implementation: if
the shift is to the right, although it always makes the result
smaller than the input value it might not be within the 48-bit range
the result is supposed to be if the input had some bits in [63..48]
set and the shift didn't bring all of those within the [47..0] range.

Handle this similarly to the way we already do for this case in
do_uqrshl48_d(): extend the calculated result from 48 bits,
and return that if not saturating or if it doesn't change the
result; otherwise fall through to return a saturated value.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/mve_helper.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index 5730b48f35e..1a4b2ef8075 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -1563,6 +1563,8 @@ uint64_t HELPER(mve_uqrshll)(CPUARMState *env, uint64_t n, uint32_t shift)
 static inline int64_t do_sqrshl48_d(int64_t src, int64_t shift,
                                     bool round, uint32_t *sat)
 {
+    int64_t val, extval;
+
     if (shift <= -48) {
         /* Rounding the sign bit always produces 0. */
         if (round) {
@@ -1572,9 +1574,14 @@ static inline int64_t do_sqrshl48_d(int64_t src, int64_t shift,
     } else if (shift < 0) {
         if (round) {
             src >>= -shift - 1;
-            return (src >> 1) + (src & 1);
+            val = (src >> 1) + (src & 1);
+        } else {
+            val = src >> -shift;
+        }
+        extval = sextract64(val, 0, 48);
+        if (!sat || val == extval) {
+            return extval;
         }
-        return src >> -shift;
     } else if (shift < 48) {
         int64_t extval = sextract64(src << shift, 0, 48);
         if (!sat || src == (extval >> shift)) {
-- 
2.20.1

[PULL 08/44] target/arm: Fix calculation of LTP mask when LR is 0

[Peter Maydell]

In mve_element_mask(), we calculate a mask for tail predication which
should have a number of 1 bits based on the value of LR.  However,
our MAKE_64BIT_MASK() macro has undefined behaviour when passed a
zero length.  Special case this to give the all-zeroes mask we
require.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/mve_helper.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index 1a4b2ef8075..bc67b86e700 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -64,7 +64,8 @@ static uint16_t mve_element_mask(CPUARMState *env)
          */
         int masklen = env->regs[14] << env->v7m.ltpsize;
         assert(masklen <= 16);
-        mask &= MAKE_64BIT_MASK(0, masklen);
+        uint16_t ltpmask = masklen ? MAKE_64BIT_MASK(0, masklen) : 0;
+        mask &= ltpmask;
     }
 
     if ((env->condexec_bits & 0xf) == 0) {
-- 
2.20.1

[PULL 09/44] target/arm: Factor out mve_eci_mask()

[Peter Maydell]

In some situations we need a mask telling us which parts of the
vector correspond to beats that are not being executed because of
ECI, separately from the combined "which bytes are predicated away"
mask.  Factor this mask calculation out of mve_element_mask() into
its own function.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/mve_helper.c | 58 ++++++++++++++++++++++++-----------------
 1 file changed, 34 insertions(+), 24 deletions(-)

diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index bc67b86e700..ffff280726d 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -26,6 +26,35 @@
 #include "exec/exec-all.h"
 #include "tcg/tcg.h"
 
+static uint16_t mve_eci_mask(CPUARMState *env)
+{
+    /*
+     * Return the mask of which elements in the MVE vector correspond
+     * to beats being executed. The mask has 1 bits for executed lanes
+     * and 0 bits where ECI says this beat was already executed.
+     */
+    int eci;
+
+    if ((env->condexec_bits & 0xf) != 0) {
+        return 0xffff;
+    }
+
+    eci = env->condexec_bits >> 4;
+    switch (eci) {
+    case ECI_NONE:
+        return 0xffff;
+    case ECI_A0:
+        return 0xfff0;
+    case ECI_A0A1:
+        return 0xff00;
+    case ECI_A0A1A2:
+    case ECI_A0A1A2B0:
+        return 0xf000;
+    default:
+        g_assert_not_reached();
+    }
+}
+
 static uint16_t mve_element_mask(CPUARMState *env)
 {
     /*
@@ -68,30 +97,11 @@ static uint16_t mve_element_mask(CPUARMState *env)
         mask &= ltpmask;
     }
 
-    if ((env->condexec_bits & 0xf) == 0) {
-        /*
-         * ECI bits indicate which beats are already executed;
-         * we handle this by effectively predicating them out.
-         */
-        int eci = env->condexec_bits >> 4;
-        switch (eci) {
-        case ECI_NONE:
-            break;
-        case ECI_A0:
-            mask &= 0xfff0;
-            break;
-        case ECI_A0A1:
-            mask &= 0xff00;
-            break;
-        case ECI_A0A1A2:
-        case ECI_A0A1A2B0:
-            mask &= 0xf000;
-            break;
-        default:
-            g_assert_not_reached();
-        }
-    }
-
+    /*
+     * ECI bits indicate which beats are already executed;
+     * we handle this by effectively predicating them out.
+     */
+    mask &= mve_eci_mask(env);
     return mask;
 }
 
-- 
2.20.1

[PULL 10/44] target/arm: Fix VPT advance when ECI is non-zero

[Peter Maydell]

We were not paying attention to the ECI state when advancing the VPT
state.  Architecturally, VPT state advance happens for every beat
(see the pseudocode VPTAdvance()), so on every beat the 4 bits of
VPR.P0 corresponding to the current beat are inverted if required,
and at the end of beats 1 and 3 the VPR MASK fields are updated.
This means that if the ECI state says we should not be executing all
4 beats then we need to skip some of the updating of the VPR that we
currently do in mve_advance_vpt().

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/mve_helper.c | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index ffff280726d..bc89ce94d5a 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -110,6 +110,8 @@ static void mve_advance_vpt(CPUARMState *env)
     /* Advance the VPT and ECI state if necessary */
     uint32_t vpr = env->v7m.vpr;
     unsigned mask01, mask23;
+    uint16_t inv_mask;
+    uint16_t eci_mask = mve_eci_mask(env);
 
     if ((env->condexec_bits & 0xf) == 0) {
         env->condexec_bits = (env->condexec_bits == (ECI_A0A1A2B0 << 4)) ?
@@ -121,17 +123,25 @@ static void mve_advance_vpt(CPUARMState *env)
         return;
     }
 
+    /* Invert P0 bits if needed, but only for beats we actually executed */
     mask01 = FIELD_EX32(vpr, V7M_VPR, MASK01);
     mask23 = FIELD_EX32(vpr, V7M_VPR, MASK23);
-    if (mask01 > 8) {
-        /* high bit set, but not 0b1000: invert the relevant half of P0 */
-        vpr ^= 0xff;
+    /* Start by assuming we invert all bits corresponding to executed beats */
+    inv_mask = eci_mask;
+    if (mask01 <= 8) {
+        /* MASK01 says don't invert low half of P0 */
+        inv_mask &= ~0xff;
     }
-    if (mask23 > 8) {
-        /* high bit set, but not 0b1000: invert the relevant half of P0 */
-        vpr ^= 0xff00;
+    if (mask23 <= 8) {
+        /* MASK23 says don't invert high half of P0 */
+        inv_mask &= ~0xff00;
     }
-    vpr = FIELD_DP32(vpr, V7M_VPR, MASK01, mask01 << 1);
+    vpr ^= inv_mask;
+    /* Only update MASK01 if beat 1 executed */
+    if (eci_mask & 0xf0) {
+        vpr = FIELD_DP32(vpr, V7M_VPR, MASK01, mask01 << 1);
+    }
+    /* Beat 3 always executes, so update MASK23 */
     vpr = FIELD_DP32(vpr, V7M_VPR, MASK23, mask23 << 1);
     env->v7m.vpr = vpr;
 }
-- 
2.20.1

[PULL 11/44] target/arm: Fix VLDRB/H/W for predicated elements

[Peter Maydell]

For vector loads, predicated elements are zeroed, instead of
retaining their previous values (as happens for most data
processing operations). This means we need to distinguish
"beat not executed due to ECI" (don't touch destination
element) from "beat executed but predicated out" (zero
destination element).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/mve_helper.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index bc89ce94d5a..be8b9545317 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -146,12 +146,13 @@ static void mve_advance_vpt(CPUARMState *env)
     env->v7m.vpr = vpr;
 }
 
-
+/* For loads, predicated lanes are zeroed instead of keeping their old values */
 #define DO_VLDR(OP, MSIZE, LDTYPE, ESIZE, TYPE)                         \
     void HELPER(mve_##OP)(CPUARMState *env, void *vd, uint32_t addr)    \
     {                                                                   \
         TYPE *d = vd;                                                   \
         uint16_t mask = mve_element_mask(env);                          \
+        uint16_t eci_mask = mve_eci_mask(env);                          \
         unsigned b, e;                                                  \
         /*                                                              \
          * R_SXTM allows the dest reg to become UNKNOWN for abandoned   \
@@ -159,8 +160,9 @@ static void mve_advance_vpt(CPUARMState *env)
          * then take an exception.                                      \
          */                                                             \
         for (b = 0, e = 0; b < 16; b += ESIZE, e++) {                   \
-            if (mask & (1 << b)) {                                      \
-                d[H##ESIZE(e)] = cpu_##LDTYPE##_data_ra(env, addr, GETPC()); \
+            if (eci_mask & (1 << b)) {                                  \
+                d[H##ESIZE(e)] = (mask & (1 << b)) ?                    \
+                    cpu_##LDTYPE##_data_ra(env, addr, GETPC()) : 0;     \
             }                                                           \
             addr += MSIZE;                                              \
         }                                                               \
-- 
2.20.1

[PULL 12/44] target/arm: Implement MVE VMULL (polynomial)

[Peter Maydell]

Implement the MVE VMULL (polynomial) insn.  Unlike Neon, this comes
in two flavours: 8x8->16 and a 16x16->32.  Also unlike Neon, the
inputs are in either the low or the high half of each double-width
element.

The assembler for this insn indicates the size with "P8" or "P16",
encoded into bit 28 as size = 0 or 1. We choose to follow the
same encoding as VQDMULL and decode this into a->size as MO_16
or MO_32 indicating the size of the result elements. This then
carries through to the helper function names where it then
matches up with the existing pmull_h() which does an 8x8->16
operation and a new pmull_w() which does the 16x16->32.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    |  5 +++++
 target/arm/vec_internal.h  | 11 +++++++++++
 target/arm/mve.decode      | 14 ++++++++++----
 target/arm/mve_helper.c    | 16 ++++++++++++++++
 target/arm/translate-mve.c | 28 ++++++++++++++++++++++++++++
 target/arm/vec_helper.c    | 14 +++++++++++++-
 6 files changed, 83 insertions(+), 5 deletions(-)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index 56e40844ad9..84adfb21517 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -145,6 +145,11 @@ DEF_HELPER_FLAGS_4(mve_vmulltub, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 DEF_HELPER_FLAGS_4(mve_vmulltuh, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 DEF_HELPER_FLAGS_4(mve_vmulltuw, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 
+DEF_HELPER_FLAGS_4(mve_vmullpbh, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
+DEF_HELPER_FLAGS_4(mve_vmullpth, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
+DEF_HELPER_FLAGS_4(mve_vmullpbw, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
+DEF_HELPER_FLAGS_4(mve_vmullptw, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
+
 DEF_HELPER_FLAGS_4(mve_vqdmulhb, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 DEF_HELPER_FLAGS_4(mve_vqdmulhh, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 DEF_HELPER_FLAGS_4(mve_vqdmulhw, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
diff --git a/target/arm/vec_internal.h b/target/arm/vec_internal.h
index 865d2139447..2a335582906 100644
--- a/target/arm/vec_internal.h
+++ b/target/arm/vec_internal.h
@@ -206,4 +206,15 @@ int16_t do_sqrdmlah_h(int16_t, int16_t, int16_t, bool, bool, uint32_t *);
 int32_t do_sqrdmlah_s(int32_t, int32_t, int32_t, bool, bool, uint32_t *);
 int64_t do_sqrdmlah_d(int64_t, int64_t, int64_t, bool, bool);
 
+/*
+ * 8 x 8 -> 16 vector polynomial multiply where the inputs are
+ * in the low 8 bits of each 16-bit element
+*/
+uint64_t pmull_h(uint64_t op1, uint64_t op2);
+/*
+ * 16 x 16 -> 32 vector polynomial multiply where the inputs are
+ * in the low 16 bits of each 32-bit element
+ */
+uint64_t pmull_w(uint64_t op1, uint64_t op2);
+
 #endif /* TARGET_ARM_VEC_INTERNALS_H */
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index fa9d921f933..de079ec517d 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -173,10 +173,16 @@ VHADD_U          111 1 1111 0 . .. ... 0 ... 0 0000 . 1 . 0 ... 0 @2op
 VHSUB_S          111 0 1111 0 . .. ... 0 ... 0 0010 . 1 . 0 ... 0 @2op
 VHSUB_U          111 1 1111 0 . .. ... 0 ... 0 0010 . 1 . 0 ... 0 @2op
 
-VMULL_BS         111 0 1110 0 . .. ... 1 ... 0 1110 . 0 . 0 ... 0 @2op
-VMULL_BU         111 1 1110 0 . .. ... 1 ... 0 1110 . 0 . 0 ... 0 @2op
-VMULL_TS         111 0 1110 0 . .. ... 1 ... 1 1110 . 0 . 0 ... 0 @2op
-VMULL_TU         111 1 1110 0 . .. ... 1 ... 1 1110 . 0 . 0 ... 0 @2op
+{
+  VMULLP_B       111 . 1110 0 . 11 ... 1 ... 0 1110 . 0 . 0 ... 0 @2op_sz28
+  VMULL_BS       111 0 1110 0 . .. ... 1 ... 0 1110 . 0 . 0 ... 0 @2op
+  VMULL_BU       111 1 1110 0 . .. ... 1 ... 0 1110 . 0 . 0 ... 0 @2op
+}
+{
+  VMULLP_T       111 . 1110 0 . 11 ... 1 ... 1 1110 . 0 . 0 ... 0 @2op_sz28
+  VMULL_TS       111 0 1110 0 . .. ... 1 ... 1 1110 . 0 . 0 ... 0 @2op
+  VMULL_TU       111 1 1110 0 . .. ... 1 ... 1 1110 . 0 . 0 ... 0 @2op
+}
 
 VQDMULH          1110 1111 0 . .. ... 0 ... 0 1011 . 1 . 0 ... 0 @2op
 VQRDMULH         1111 1111 0 . .. ... 0 ... 0 1011 . 1 . 0 ... 0 @2op
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index be8b9545317..91fb346d7e5 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -481,6 +481,22 @@ DO_2OP_L(vmulltub, 1, 1, uint8_t, 2, uint16_t, DO_MUL)
 DO_2OP_L(vmulltuh, 1, 2, uint16_t, 4, uint32_t, DO_MUL)
 DO_2OP_L(vmulltuw, 1, 4, uint32_t, 8, uint64_t, DO_MUL)
 
+/*
+ * Polynomial multiply. We can always do this generating 64 bits
+ * of the result at a time, so we don't need to use DO_2OP_L.
+ */
+#define VMULLPH_MASK 0x00ff00ff00ff00ffULL
+#define VMULLPW_MASK 0x0000ffff0000ffffULL
+#define DO_VMULLPBH(N, M) pmull_h((N) & VMULLPH_MASK, (M) & VMULLPH_MASK)
+#define DO_VMULLPTH(N, M) DO_VMULLPBH((N) >> 8, (M) >> 8)
+#define DO_VMULLPBW(N, M) pmull_w((N) & VMULLPW_MASK, (M) & VMULLPW_MASK)
+#define DO_VMULLPTW(N, M) DO_VMULLPBW((N) >> 16, (M) >> 16)
+
+DO_2OP(vmullpbh, 8, uint64_t, DO_VMULLPBH)
+DO_2OP(vmullpth, 8, uint64_t, DO_VMULLPTH)
+DO_2OP(vmullpbw, 8, uint64_t, DO_VMULLPBW)
+DO_2OP(vmullptw, 8, uint64_t, DO_VMULLPTW)
+
 /*
  * Because the computation type is at least twice as large as required,
  * these work for both signed and unsigned source types.
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index a2a45036a0b..d318f34b2bc 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -464,6 +464,34 @@ static bool trans_VQDMULLT(DisasContext *s, arg_2op *a)
     return do_2op(s, a, fns[a->size]);
 }
 
+static bool trans_VMULLP_B(DisasContext *s, arg_2op *a)
+{
+    /*
+     * Note that a->size indicates the output size, ie VMULL.P8
+     * is the 8x8->16 operation and a->size is MO_16; VMULL.P16
+     * is the 16x16->32 operation and a->size is MO_32.
+     */
+    static MVEGenTwoOpFn * const fns[] = {
+        NULL,
+        gen_helper_mve_vmullpbh,
+        gen_helper_mve_vmullpbw,
+        NULL,
+    };
+    return do_2op(s, a, fns[a->size]);
+}
+
+static bool trans_VMULLP_T(DisasContext *s, arg_2op *a)
+{
+    /* a->size is as for trans_VMULLP_B */
+    static MVEGenTwoOpFn * const fns[] = {
+        NULL,
+        gen_helper_mve_vmullpth,
+        gen_helper_mve_vmullptw,
+        NULL,
+    };
+    return do_2op(s, a, fns[a->size]);
+}
+
 /*
  * VADC and VSBC: these perform an add-with-carry or subtract-with-carry
  * of the 32-bit elements in each lane of the input vectors, where the
diff --git a/target/arm/vec_helper.c b/target/arm/vec_helper.c
index 034f6b84f78..17fb1583622 100644
--- a/target/arm/vec_helper.c
+++ b/target/arm/vec_helper.c
@@ -2028,11 +2028,23 @@ static uint64_t expand_byte_to_half(uint64_t x)
          | ((x & 0xff000000) << 24);
 }
 
-static uint64_t pmull_h(uint64_t op1, uint64_t op2)
+uint64_t pmull_w(uint64_t op1, uint64_t op2)
 {
     uint64_t result = 0;
     int i;
+    for (i = 0; i < 16; ++i) {
+        uint64_t mask = (op1 & 0x0000000100000001ull) * 0xffffffff;
+        result ^= op2 & mask;
+        op1 >>= 1;
+        op2 <<= 1;
+    }
+    return result;
+}
 
+uint64_t pmull_h(uint64_t op1, uint64_t op2)
+{
+    uint64_t result = 0;
+    int i;
     for (i = 0; i < 8; ++i) {
         uint64_t mask = (op1 & 0x0001000100010001ull) * 0xffff;
         result ^= op2 & mask;
-- 
2.20.1

[PULL 13/44] target/arm: Implement MVE incrementing/decrementing dup insns

[Peter Maydell]

Implement the MVE incrementing/decrementing dup insns VIDUP, VDDUP,
VIWDUP and VDWDUP.  These fill the elements of a vector with
successively incrementing values, starting at the offset specified in
a general purpose register.  The final value of the offset is written
back to this register.  The wrapping variants take a second general
purpose register which specifies the point where the count should
wrap back to 0.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    |  12 ++++
 target/arm/mve.decode      |  25 ++++++++
 target/arm/mve_helper.c    |  63 +++++++++++++++++++
 target/arm/translate-mve.c | 120 +++++++++++++++++++++++++++++++++++++
 4 files changed, 220 insertions(+)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index 84adfb21517..b9af03cc03b 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -35,6 +35,18 @@ DEF_HELPER_FLAGS_3(mve_vstrh_w, TCG_CALL_NO_WG, void, env, ptr, i32)
 
 DEF_HELPER_FLAGS_3(mve_vdup, TCG_CALL_NO_WG, void, env, ptr, i32)
 
+DEF_HELPER_FLAGS_4(mve_vidupb, TCG_CALL_NO_WG, i32, env, ptr, i32, i32)
+DEF_HELPER_FLAGS_4(mve_viduph, TCG_CALL_NO_WG, i32, env, ptr, i32, i32)
+DEF_HELPER_FLAGS_4(mve_vidupw, TCG_CALL_NO_WG, i32, env, ptr, i32, i32)
+
+DEF_HELPER_FLAGS_5(mve_viwdupb, TCG_CALL_NO_WG, i32, env, ptr, i32, i32, i32)
+DEF_HELPER_FLAGS_5(mve_viwduph, TCG_CALL_NO_WG, i32, env, ptr, i32, i32, i32)
+DEF_HELPER_FLAGS_5(mve_viwdupw, TCG_CALL_NO_WG, i32, env, ptr, i32, i32, i32)
+
+DEF_HELPER_FLAGS_5(mve_vdwdupb, TCG_CALL_NO_WG, i32, env, ptr, i32, i32, i32)
+DEF_HELPER_FLAGS_5(mve_vdwduph, TCG_CALL_NO_WG, i32, env, ptr, i32, i32, i32)
+DEF_HELPER_FLAGS_5(mve_vdwdupw, TCG_CALL_NO_WG, i32, env, ptr, i32, i32, i32)
+
 DEF_HELPER_FLAGS_3(mve_vclsb, TCG_CALL_NO_WG, void, env, ptr, ptr)
 DEF_HELPER_FLAGS_3(mve_vclsh, TCG_CALL_NO_WG, void, env, ptr, ptr)
 DEF_HELPER_FLAGS_3(mve_vclsw, TCG_CALL_NO_WG, void, env, ptr, ptr)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index de079ec517d..88c9c18ebf1 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -35,6 +35,8 @@
 &2scalar qd qn rm size
 &1imm qd imm cmode op
 &2shift qd qm shift size
+&vidup qd rn size imm
+&viwdup qd rn rm size imm
 
 @vldr_vstr ....... . . . . l:1 rn:4 ... ...... imm:7 &vldr_vstr qd=%qd u=0
 # Note that both Rn and Qd are 3 bits only (no D bit)
@@ -259,6 +261,29 @@ VDUP             1110 1110 1 1 10 ... 0 .... 1011 . 0 0 1 0000 @vdup size=0
 VDUP             1110 1110 1 0 10 ... 0 .... 1011 . 0 1 1 0000 @vdup size=1
 VDUP             1110 1110 1 0 10 ... 0 .... 1011 . 0 0 1 0000 @vdup size=2
 
+# Incrementing and decrementing dup
+
+# VIDUP, VDDUP format immediate: 1 << (immh:imml)
+%imm_vidup 7:1 0:1 !function=vidup_imm
+
+# VIDUP, VDDUP registers: Rm bits [3:1] from insn, bit 0 is 1;
+# Rn bits [3:1] from insn, bit 0 is 0
+%vidup_rm 1:3 !function=times_2_plus_1
+%vidup_rn 17:3 !function=times_2
+
+@vidup           .... .... . . size:2 .... .... .... .... .... \
+                 qd=%qd imm=%imm_vidup rn=%vidup_rn &vidup
+@viwdup          .... .... . . size:2 .... .... .... .... .... \
+                 qd=%qd imm=%imm_vidup rm=%vidup_rm rn=%vidup_rn &viwdup
+{
+  VIDUP          1110 1110 0 . .. ... 1 ... 0 1111 . 110 111 . @vidup
+  VIWDUP         1110 1110 0 . .. ... 1 ... 0 1111 . 110 ... . @viwdup
+}
+{
+  VDDUP          1110 1110 0 . .. ... 1 ... 1 1111 . 110 111 . @vidup
+  VDWDUP         1110 1110 0 . .. ... 1 ... 1 1111 . 110 ... . @viwdup
+}
+
 # multiply-add long dual accumulate
 # rdahi: bits [3:1] from insn, bit 0 is 1
 # rdalo: bits [3:1] from insn, bit 0 is 0
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index 91fb346d7e5..38b4181db2a 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -1695,3 +1695,66 @@ uint32_t HELPER(mve_sqrshr)(CPUARMState *env, uint32_t n, uint32_t shift)
 {
     return do_sqrshl_bhs(n, -(int8_t)shift, 32, true, &env->QF);
 }
+
+#define DO_VIDUP(OP, ESIZE, TYPE, FN)                           \
+    uint32_t HELPER(mve_##OP)(CPUARMState *env, void *vd,       \
+                           uint32_t offset, uint32_t imm)       \
+    {                                                           \
+        TYPE *d = vd;                                           \
+        uint16_t mask = mve_element_mask(env);                  \
+        unsigned e;                                             \
+        for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) {      \
+            mergemask(&d[H##ESIZE(e)], offset, mask);           \
+            offset = FN(offset, imm);                           \
+        }                                                       \
+        mve_advance_vpt(env);                                   \
+        return offset;                                          \
+    }
+
+#define DO_VIWDUP(OP, ESIZE, TYPE, FN)                          \
+    uint32_t HELPER(mve_##OP)(CPUARMState *env, void *vd,       \
+                              uint32_t offset, uint32_t wrap,   \
+                              uint32_t imm)                     \
+    {                                                           \
+        TYPE *d = vd;                                           \
+        uint16_t mask = mve_element_mask(env);                  \
+        unsigned e;                                             \
+        for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) {      \
+            mergemask(&d[H##ESIZE(e)], offset, mask);           \
+            offset = FN(offset, wrap, imm);                     \
+        }                                                       \
+        mve_advance_vpt(env);                                   \
+        return offset;                                          \
+    }
+
+#define DO_VIDUP_ALL(OP, FN)                    \
+    DO_VIDUP(OP##b, 1, int8_t, FN)              \
+    DO_VIDUP(OP##h, 2, int16_t, FN)             \
+    DO_VIDUP(OP##w, 4, int32_t, FN)
+
+#define DO_VIWDUP_ALL(OP, FN)                   \
+    DO_VIWDUP(OP##b, 1, int8_t, FN)             \
+    DO_VIWDUP(OP##h, 2, int16_t, FN)            \
+    DO_VIWDUP(OP##w, 4, int32_t, FN)
+
+static uint32_t do_add_wrap(uint32_t offset, uint32_t wrap, uint32_t imm)
+{
+    offset += imm;
+    if (offset == wrap) {
+        offset = 0;
+    }
+    return offset;
+}
+
+static uint32_t do_sub_wrap(uint32_t offset, uint32_t wrap, uint32_t imm)
+{
+    if (offset == 0) {
+        offset = wrap;
+    }
+    offset -= imm;
+    return offset;
+}
+
+DO_VIDUP_ALL(vidup, DO_ADD)
+DO_VIWDUP_ALL(viwdup, do_add_wrap)
+DO_VIWDUP_ALL(vdwdup, do_sub_wrap)
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index d318f34b2bc..a220521c00b 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -25,6 +25,11 @@
 #include "translate.h"
 #include "translate-a32.h"
 
+static inline int vidup_imm(DisasContext *s, int x)
+{
+    return 1 << x;
+}
+
 /* Include the generated decoder */
 #include "decode-mve.c.inc"
 
@@ -36,6 +41,8 @@ typedef void MVEGenTwoOpShiftFn(TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_i32);
 typedef void MVEGenDualAccOpFn(TCGv_i64, TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_i64);
 typedef void MVEGenVADDVFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_i32);
 typedef void MVEGenOneOpImmFn(TCGv_ptr, TCGv_ptr, TCGv_i64);
+typedef void MVEGenVIDUPFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_i32, TCGv_i32);
+typedef void MVEGenVIWDUPFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_i32, TCGv_i32, TCGv_i32);
 
 /* Return the offset of a Qn register (same semantics as aa32_vfp_qreg()) */
 static inline long mve_qreg_offset(unsigned reg)
@@ -1059,3 +1066,116 @@ static bool trans_VSHLC(DisasContext *s, arg_VSHLC *a)
     mve_update_eci(s);
     return true;
 }
+
+static bool do_vidup(DisasContext *s, arg_vidup *a, MVEGenVIDUPFn *fn)
+{
+    TCGv_ptr qd;
+    TCGv_i32 rn;
+
+    /*
+     * Vector increment/decrement with wrap and duplicate (VIDUP, VDDUP).
+     * This fills the vector with elements of successively increasing
+     * or decreasing values, starting from Rn.
+     */
+    if (!dc_isar_feature(aa32_mve, s) || !mve_check_qreg_bank(s, a->qd)) {
+        return false;
+    }
+    if (a->size == MO_64) {
+        /* size 0b11 is another encoding */
+        return false;
+    }
+    if (!mve_eci_check(s) || !vfp_access_check(s)) {
+        return true;
+    }
+
+    qd = mve_qreg_ptr(a->qd);
+    rn = load_reg(s, a->rn);
+    fn(rn, cpu_env, qd, rn, tcg_constant_i32(a->imm));
+    store_reg(s, a->rn, rn);
+    tcg_temp_free_ptr(qd);
+    mve_update_eci(s);
+    return true;
+}
+
+static bool do_viwdup(DisasContext *s, arg_viwdup *a, MVEGenVIWDUPFn *fn)
+{
+    TCGv_ptr qd;
+    TCGv_i32 rn, rm;
+
+    /*
+     * Vector increment/decrement with wrap and duplicate (VIWDUp, VDWDUP)
+     * This fills the vector with elements of successively increasing
+     * or decreasing values, starting from Rn. Rm specifies a point where
+     * the count wraps back around to 0. The updated offset is written back
+     * to Rn.
+     */
+    if (!dc_isar_feature(aa32_mve, s) || !mve_check_qreg_bank(s, a->qd)) {
+        return false;
+    }
+    if (!fn || a->rm == 13 || a->rm == 15) {
+        /*
+         * size 0b11 is another encoding; Rm == 13 is UNPREDICTABLE;
+         * Rm == 13 is VIWDUP, VDWDUP.
+         */
+        return false;
+    }
+    if (!mve_eci_check(s) || !vfp_access_check(s)) {
+        return true;
+    }
+
+    qd = mve_qreg_ptr(a->qd);
+    rn = load_reg(s, a->rn);
+    rm = load_reg(s, a->rm);
+    fn(rn, cpu_env, qd, rn, rm, tcg_constant_i32(a->imm));
+    store_reg(s, a->rn, rn);
+    tcg_temp_free_ptr(qd);
+    tcg_temp_free_i32(rm);
+    mve_update_eci(s);
+    return true;
+}
+
+static bool trans_VIDUP(DisasContext *s, arg_vidup *a)
+{
+    static MVEGenVIDUPFn * const fns[] = {
+        gen_helper_mve_vidupb,
+        gen_helper_mve_viduph,
+        gen_helper_mve_vidupw,
+        NULL,
+    };
+    return do_vidup(s, a, fns[a->size]);
+}
+
+static bool trans_VDDUP(DisasContext *s, arg_vidup *a)
+{
+    static MVEGenVIDUPFn * const fns[] = {
+        gen_helper_mve_vidupb,
+        gen_helper_mve_viduph,
+        gen_helper_mve_vidupw,
+        NULL,
+    };
+    /* VDDUP is just like VIDUP but with a negative immediate */
+    a->imm = -a->imm;
+    return do_vidup(s, a, fns[a->size]);
+}
+
+static bool trans_VIWDUP(DisasContext *s, arg_viwdup *a)
+{
+    static MVEGenVIWDUPFn * const fns[] = {
+        gen_helper_mve_viwdupb,
+        gen_helper_mve_viwduph,
+        gen_helper_mve_viwdupw,
+        NULL,
+    };
+    return do_viwdup(s, a, fns[a->size]);
+}
+
+static bool trans_VDWDUP(DisasContext *s, arg_viwdup *a)
+{
+    static MVEGenVIWDUPFn * const fns[] = {
+        gen_helper_mve_vdwdupb,
+        gen_helper_mve_vdwduph,
+        gen_helper_mve_vdwdupw,
+        NULL,
+    };
+    return do_viwdup(s, a, fns[a->size]);
+}
-- 
2.20.1

[PULL 14/44] target/arm: Factor out gen_vpst()

[Peter Maydell]

Factor out the "generate code to update VPR.MASK01/MASK23" part of
trans_VPST(); we are going to want to reuse it for the VPT insns.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/translate-mve.c | 31 +++++++++++++++++--------------
 1 file changed, 17 insertions(+), 14 deletions(-)

diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index a220521c00b..6d8da361469 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -737,33 +737,24 @@ static bool trans_VRMLSLDAVH(DisasContext *s, arg_vmlaldav *a)
     return do_long_dual_acc(s, a, fns[a->x]);
 }
 
-static bool trans_VPST(DisasContext *s, arg_VPST *a)
+static void gen_vpst(DisasContext *s, uint32_t mask)
 {
-    TCGv_i32 vpr;
-
-    /* mask == 0 is a "related encoding" */
-    if (!dc_isar_feature(aa32_mve, s) || !a->mask) {
-        return false;
-    }
-    if (!mve_eci_check(s) || !vfp_access_check(s)) {
-        return true;
-    }
     /*
      * Set the VPR mask fields. We take advantage of MASK01 and MASK23
      * being adjacent fields in the register.
      *
-     * This insn is not predicated, but it is subject to beat-wise
+     * Updating the masks is not predicated, but it is subject to beat-wise
      * execution, and the mask is updated on the odd-numbered beats.
      * So if PSR.ECI says we should skip beat 1, we mustn't update the
      * 01 mask field.
      */
-    vpr = load_cpu_field(v7m.vpr);
+    TCGv_i32 vpr = load_cpu_field(v7m.vpr);
     switch (s->eci) {
     case ECI_NONE:
     case ECI_A0:
         /* Update both 01 and 23 fields */
         tcg_gen_deposit_i32(vpr, vpr,
-                            tcg_constant_i32(a->mask | (a->mask << 4)),
+                            tcg_constant_i32(mask | (mask << 4)),
                             R_V7M_VPR_MASK01_SHIFT,
                             R_V7M_VPR_MASK01_LENGTH + R_V7M_VPR_MASK23_LENGTH);
         break;
@@ -772,13 +763,25 @@ static bool trans_VPST(DisasContext *s, arg_VPST *a)
     case ECI_A0A1A2B0:
         /* Update only the 23 mask field */
         tcg_gen_deposit_i32(vpr, vpr,
-                            tcg_constant_i32(a->mask),
+                            tcg_constant_i32(mask),
                             R_V7M_VPR_MASK23_SHIFT, R_V7M_VPR_MASK23_LENGTH);
         break;
     default:
         g_assert_not_reached();
     }
     store_cpu_field(vpr, v7m.vpr);
+}
+
+static bool trans_VPST(DisasContext *s, arg_VPST *a)
+{
+    /* mask == 0 is a "related encoding" */
+    if (!dc_isar_feature(aa32_mve, s) || !a->mask) {
+        return false;
+    }
+    if (!mve_eci_check(s) || !vfp_access_check(s)) {
+        return true;
+    }
+    gen_vpst(s, a->mask);
     mve_update_and_store_eci(s);
     return true;
 }
-- 
2.20.1

[PULL 15/44] target/arm: Implement MVE integer vector comparisons

[Peter Maydell]

Implement the MVE integer vector comparison instructions.  These are
"VCMP (vector)" encodings T1, T2 and T3, and "VPT (vector)" encodings
T1, T2 and T3.

These insns compare corresponding elements in each vector, and update
the VPR.P0 predicate bits with the results of the comparison.  VPT
also sets the VPR.MASK01 and VPR.MASK23 fields -- it is effectively
"VCMP then VPST".

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    | 32 ++++++++++++++++++++++
 target/arm/mve.decode      | 18 +++++++++++-
 target/arm/mve_helper.c    | 56 ++++++++++++++++++++++++++++++++++++++
 target/arm/translate-mve.c | 47 ++++++++++++++++++++++++++++++++
 4 files changed, 152 insertions(+), 1 deletion(-)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index b9af03cc03b..ca5a6ab51cc 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -480,3 +480,35 @@ DEF_HELPER_FLAGS_3(mve_uqshl, TCG_CALL_NO_RWG, i32, env, i32, i32)
 DEF_HELPER_FLAGS_3(mve_sqshl, TCG_CALL_NO_RWG, i32, env, i32, i32)
 DEF_HELPER_FLAGS_3(mve_uqrshl, TCG_CALL_NO_RWG, i32, env, i32, i32)
 DEF_HELPER_FLAGS_3(mve_sqrshr, TCG_CALL_NO_RWG, i32, env, i32, i32)
+
+DEF_HELPER_FLAGS_3(mve_vcmpeqb, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vcmpeqh, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vcmpeqw, TCG_CALL_NO_WG, void, env, ptr, ptr)
+
+DEF_HELPER_FLAGS_3(mve_vcmpneb, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vcmpneh, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vcmpnew, TCG_CALL_NO_WG, void, env, ptr, ptr)
+
+DEF_HELPER_FLAGS_3(mve_vcmpcsb, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vcmpcsh, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vcmpcsw, TCG_CALL_NO_WG, void, env, ptr, ptr)
+
+DEF_HELPER_FLAGS_3(mve_vcmphib, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vcmphih, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vcmphiw, TCG_CALL_NO_WG, void, env, ptr, ptr)
+
+DEF_HELPER_FLAGS_3(mve_vcmpgeb, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vcmpgeh, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vcmpgew, TCG_CALL_NO_WG, void, env, ptr, ptr)
+
+DEF_HELPER_FLAGS_3(mve_vcmpltb, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vcmplth, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vcmpltw, TCG_CALL_NO_WG, void, env, ptr, ptr)
+
+DEF_HELPER_FLAGS_3(mve_vcmpgtb, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vcmpgth, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vcmpgtw, TCG_CALL_NO_WG, void, env, ptr, ptr)
+
+DEF_HELPER_FLAGS_3(mve_vcmpleb, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vcmpleh, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vcmplew, TCG_CALL_NO_WG, void, env, ptr, ptr)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index 88c9c18ebf1..76bbf9a6136 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -37,6 +37,7 @@
 &2shift qd qm shift size
 &vidup qd rn size imm
 &viwdup qd rn rm size imm
+&vcmp qm qn size mask
 
 @vldr_vstr ....... . . . . l:1 rn:4 ... ...... imm:7 &vldr_vstr qd=%qd u=0
 # Note that both Rn and Qd are 3 bits only (no D bit)
@@ -86,6 +87,10 @@
 @2_shr_w .... .... .. 1 ..... .... .... .... .... &2shift qd=%qd qm=%qm \
          size=2 shift=%rshift_i5
 
+# Vector comparison; 4-bit Qm but 3-bit Qn
+%mask_22_13      22:1 13:3
+@vcmp    .... .... .. size:2 qn:3 . .... .... .... .... &vcmp qm=%qm mask=%mask_22_13
+
 # Vector loads and stores
 
 # Widening loads and narrowing stores:
@@ -345,7 +350,6 @@ VQRDMULH_scalar  1111 1110 0 . .. ... 1 ... 0 1110 . 110 .... @2scalar
 }
 
 # Predicate operations
-%mask_22_13      22:1 13:3
 VPST             1111 1110 0 . 11 000 1 ... 0 1111 0100 1101 mask=%mask_22_13
 
 # Logical immediate operations (1 reg and modified-immediate)
@@ -458,3 +462,15 @@ VQRSHRUNT         111 1 1110 1 . ... ... ... 1 1111 1 1 . 0 ... 0 @2_shr_b
 VQRSHRUNT         111 1 1110 1 . ... ... ... 1 1111 1 1 . 0 ... 0 @2_shr_h
 
 VSHLC             111 0 1110 1 . 1 imm:5 ... 0 1111 1100 rdm:4 qd=%qd
+
+# Comparisons. We expand out the conditions which are split across
+# encodings T1, T2, T3 and the fc bits. These include VPT, which is
+# effectively "VCMP then VPST". A plain "VCMP" has a mask field of zero.
+VCMPEQ            1111 1110 0 . .. ... 1 ... 0 1111 0 0 . 0 ... 0 @vcmp
+VCMPNE            1111 1110 0 . .. ... 1 ... 0 1111 1 0 . 0 ... 0 @vcmp
+VCMPCS            1111 1110 0 . .. ... 1 ... 0 1111 0 0 . 0 ... 1 @vcmp
+VCMPHI            1111 1110 0 . .. ... 1 ... 0 1111 1 0 . 0 ... 1 @vcmp
+VCMPGE            1111 1110 0 . .. ... 1 ... 1 1111 0 0 . 0 ... 0 @vcmp
+VCMPLT            1111 1110 0 . .. ... 1 ... 1 1111 1 0 . 0 ... 0 @vcmp
+VCMPGT            1111 1110 0 . .. ... 1 ... 1 1111 0 0 . 0 ... 1 @vcmp
+VCMPLE            1111 1110 0 . .. ... 1 ... 1 1111 1 0 . 0 ... 1 @vcmp
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index 38b4181db2a..b0b380b94b0 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -1758,3 +1758,59 @@ static uint32_t do_sub_wrap(uint32_t offset, uint32_t wrap, uint32_t imm)
 DO_VIDUP_ALL(vidup, DO_ADD)
 DO_VIWDUP_ALL(viwdup, do_add_wrap)
 DO_VIWDUP_ALL(vdwdup, do_sub_wrap)
+
+/*
+ * Vector comparison.
+ * P0 bits for non-executed beats (where eci_mask is 0) are unchanged.
+ * P0 bits for predicated lanes in executed beats (where mask is 0) are 0.
+ * P0 bits otherwise are updated with the results of the comparisons.
+ * We must also keep unchanged the MASK fields at the top of v7m.vpr.
+ */
+#define DO_VCMP(OP, ESIZE, TYPE, FN)                                    \
+    void HELPER(glue(mve_, OP))(CPUARMState *env, void *vn, void *vm)   \
+    {                                                                   \
+        TYPE *n = vn, *m = vm;                                          \
+        uint16_t mask = mve_element_mask(env);                          \
+        uint16_t eci_mask = mve_eci_mask(env);                          \
+        uint16_t beatpred = 0;                                          \
+        uint16_t emask = MAKE_64BIT_MASK(0, ESIZE);                     \
+        unsigned e;                                                     \
+        for (e = 0; e < 16 / ESIZE; e++) {                              \
+            bool r = FN(n[H##ESIZE(e)], m[H##ESIZE(e)]);                \
+            /* Comparison sets 0/1 bits for each byte in the element */ \
+            beatpred |= r * emask;                                      \
+            emask <<= ESIZE;                                            \
+        }                                                               \
+        beatpred &= mask;                                               \
+        env->v7m.vpr = (env->v7m.vpr & ~(uint32_t)eci_mask) |           \
+            (beatpred & eci_mask);                                      \
+        mve_advance_vpt(env);                                           \
+    }
+
+#define DO_VCMP_S(OP, FN)                       \
+    DO_VCMP(OP##b, 1, int8_t, FN)               \
+    DO_VCMP(OP##h, 2, int16_t, FN)              \
+    DO_VCMP(OP##w, 4, int32_t, FN)
+
+#define DO_VCMP_U(OP, FN)                       \
+    DO_VCMP(OP##b, 1, uint8_t, FN)              \
+    DO_VCMP(OP##h, 2, uint16_t, FN)             \
+    DO_VCMP(OP##w, 4, uint32_t, FN)
+
+#define DO_EQ(N, M) ((N) == (M))
+#define DO_NE(N, M) ((N) != (M))
+#define DO_EQ(N, M) ((N) == (M))
+#define DO_EQ(N, M) ((N) == (M))
+#define DO_GE(N, M) ((N) >= (M))
+#define DO_LT(N, M) ((N) < (M))
+#define DO_GT(N, M) ((N) > (M))
+#define DO_LE(N, M) ((N) <= (M))
+
+DO_VCMP_U(vcmpeq, DO_EQ)
+DO_VCMP_U(vcmpne, DO_NE)
+DO_VCMP_U(vcmpcs, DO_GE)
+DO_VCMP_U(vcmphi, DO_GT)
+DO_VCMP_S(vcmpge, DO_GE)
+DO_VCMP_S(vcmplt, DO_LT)
+DO_VCMP_S(vcmpgt, DO_GT)
+DO_VCMP_S(vcmple, DO_LE)
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index 6d8da361469..2d7211b5271 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -43,6 +43,7 @@ typedef void MVEGenVADDVFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_i32);
 typedef void MVEGenOneOpImmFn(TCGv_ptr, TCGv_ptr, TCGv_i64);
 typedef void MVEGenVIDUPFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_i32, TCGv_i32);
 typedef void MVEGenVIWDUPFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_i32, TCGv_i32, TCGv_i32);
+typedef void MVEGenCmpFn(TCGv_ptr, TCGv_ptr, TCGv_ptr);
 
 /* Return the offset of a Qn register (same semantics as aa32_vfp_qreg()) */
 static inline long mve_qreg_offset(unsigned reg)
@@ -1182,3 +1183,49 @@ static bool trans_VDWDUP(DisasContext *s, arg_viwdup *a)
     };
     return do_viwdup(s, a, fns[a->size]);
 }
+
+static bool do_vcmp(DisasContext *s, arg_vcmp *a, MVEGenCmpFn *fn)
+{
+    TCGv_ptr qn, qm;
+
+    if (!dc_isar_feature(aa32_mve, s) || !mve_check_qreg_bank(s, a->qm) ||
+        !fn) {
+        return false;
+    }
+    if (!mve_eci_check(s) || !vfp_access_check(s)) {
+        return true;
+    }
+
+    qn = mve_qreg_ptr(a->qn);
+    qm = mve_qreg_ptr(a->qm);
+    fn(cpu_env, qn, qm);
+    tcg_temp_free_ptr(qn);
+    tcg_temp_free_ptr(qm);
+    if (a->mask) {
+        /* VPT */
+        gen_vpst(s, a->mask);
+    }
+    mve_update_eci(s);
+    return true;
+}
+
+#define DO_VCMP(INSN, FN)                                       \
+    static bool trans_##INSN(DisasContext *s, arg_vcmp *a)      \
+    {                                                           \
+        static MVEGenCmpFn * const fns[] = {                    \
+            gen_helper_mve_##FN##b,                             \
+            gen_helper_mve_##FN##h,                             \
+            gen_helper_mve_##FN##w,                             \
+            NULL,                                               \
+        };                                                      \
+        return do_vcmp(s, a, fns[a->size]);                     \
+    }
+
+DO_VCMP(VCMPEQ, vcmpeq)
+DO_VCMP(VCMPNE, vcmpne)
+DO_VCMP(VCMPCS, vcmpcs)
+DO_VCMP(VCMPHI, vcmphi)
+DO_VCMP(VCMPGE, vcmpge)
+DO_VCMP(VCMPLT, vcmplt)
+DO_VCMP(VCMPGT, vcmpgt)
+DO_VCMP(VCMPLE, vcmple)
-- 
2.20.1

[PULL 16/44] target/arm: Implement MVE integer vector-vs-scalar comparisons

[Peter Maydell]

Implement the MVE integer vector comparison instructions that compare
each element against a scalar from a general purpose register.  These
are "VCMP (vector)" encodings T4, T5 and T6 and "VPT (vector)"
encodings T4, T5 and T6.

We have to move the decodetree pattern for VPST, because it
overlaps with VCMP T4 with size = 0b11.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    | 32 +++++++++++++++++++++++++++
 target/arm/mve.decode      | 18 +++++++++++++---
 target/arm/mve_helper.c    | 44 +++++++++++++++++++++++++++++++-------
 target/arm/translate-mve.c | 43 +++++++++++++++++++++++++++++++++++++
 4 files changed, 126 insertions(+), 11 deletions(-)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index ca5a6ab51cc..4f9903e66ef 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -512,3 +512,35 @@ DEF_HELPER_FLAGS_3(mve_vcmpgtw, TCG_CALL_NO_WG, void, env, ptr, ptr)
 DEF_HELPER_FLAGS_3(mve_vcmpleb, TCG_CALL_NO_WG, void, env, ptr, ptr)
 DEF_HELPER_FLAGS_3(mve_vcmpleh, TCG_CALL_NO_WG, void, env, ptr, ptr)
 DEF_HELPER_FLAGS_3(mve_vcmplew, TCG_CALL_NO_WG, void, env, ptr, ptr)
+
+DEF_HELPER_FLAGS_3(mve_vcmpeq_scalarb, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vcmpeq_scalarh, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vcmpeq_scalarw, TCG_CALL_NO_WG, void, env, ptr, i32)
+
+DEF_HELPER_FLAGS_3(mve_vcmpne_scalarb, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vcmpne_scalarh, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vcmpne_scalarw, TCG_CALL_NO_WG, void, env, ptr, i32)
+
+DEF_HELPER_FLAGS_3(mve_vcmpcs_scalarb, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vcmpcs_scalarh, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vcmpcs_scalarw, TCG_CALL_NO_WG, void, env, ptr, i32)
+
+DEF_HELPER_FLAGS_3(mve_vcmphi_scalarb, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vcmphi_scalarh, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vcmphi_scalarw, TCG_CALL_NO_WG, void, env, ptr, i32)
+
+DEF_HELPER_FLAGS_3(mve_vcmpge_scalarb, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vcmpge_scalarh, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vcmpge_scalarw, TCG_CALL_NO_WG, void, env, ptr, i32)
+
+DEF_HELPER_FLAGS_3(mve_vcmplt_scalarb, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vcmplt_scalarh, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vcmplt_scalarw, TCG_CALL_NO_WG, void, env, ptr, i32)
+
+DEF_HELPER_FLAGS_3(mve_vcmpgt_scalarb, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vcmpgt_scalarh, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vcmpgt_scalarw, TCG_CALL_NO_WG, void, env, ptr, i32)
+
+DEF_HELPER_FLAGS_3(mve_vcmple_scalarb, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vcmple_scalarh, TCG_CALL_NO_WG, void, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vcmple_scalarw, TCG_CALL_NO_WG, void, env, ptr, i32)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index 76bbf9a6136..ef708ba80ff 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -38,6 +38,7 @@
 &vidup qd rn size imm
 &viwdup qd rn rm size imm
 &vcmp qm qn size mask
+&vcmp_scalar qn rm size mask
 
 @vldr_vstr ....... . . . . l:1 rn:4 ... ...... imm:7 &vldr_vstr qd=%qd u=0
 # Note that both Rn and Qd are 3 bits only (no D bit)
@@ -90,6 +91,8 @@
 # Vector comparison; 4-bit Qm but 3-bit Qn
 %mask_22_13      22:1 13:3
 @vcmp    .... .... .. size:2 qn:3 . .... .... .... .... &vcmp qm=%qm mask=%mask_22_13
+@vcmp_scalar .... .... .. size:2 qn:3 . .... .... .... rm:4 &vcmp_scalar \
+             mask=%mask_22_13
 
 # Vector loads and stores
 
@@ -349,9 +352,6 @@ VQRDMULH_scalar  1111 1110 0 . .. ... 1 ... 0 1110 . 110 .... @2scalar
                  rdahi=%rdahi rdalo=%rdalo
 }
 
-# Predicate operations
-VPST             1111 1110 0 . 11 000 1 ... 0 1111 0100 1101 mask=%mask_22_13
-
 # Logical immediate operations (1 reg and modified-immediate)
 
 # The cmode/op bits here decode VORR/VBIC/VMOV/VMVN, but
@@ -474,3 +474,15 @@ VCMPGE            1111 1110 0 . .. ... 1 ... 1 1111 0 0 . 0 ... 0 @vcmp
 VCMPLT            1111 1110 0 . .. ... 1 ... 1 1111 1 0 . 0 ... 0 @vcmp
 VCMPGT            1111 1110 0 . .. ... 1 ... 1 1111 0 0 . 0 ... 1 @vcmp
 VCMPLE            1111 1110 0 . .. ... 1 ... 1 1111 1 0 . 0 ... 1 @vcmp
+
+{
+  VPST            1111 1110 0 . 11 000 1 ... 0 1111 0100 1101 mask=%mask_22_13
+  VCMPEQ_scalar   1111 1110 0 . .. ... 1 ... 0 1111 0 1 0 0 .... @vcmp_scalar
+}
+VCMPNE_scalar     1111 1110 0 . .. ... 1 ... 0 1111 1 1 0 0 .... @vcmp_scalar
+VCMPCS_scalar     1111 1110 0 . .. ... 1 ... 0 1111 0 1 1 0 .... @vcmp_scalar
+VCMPHI_scalar     1111 1110 0 . .. ... 1 ... 0 1111 1 1 1 0 .... @vcmp_scalar
+VCMPGE_scalar     1111 1110 0 . .. ... 1 ... 1 1111 0 1 0 0 .... @vcmp_scalar
+VCMPLT_scalar     1111 1110 0 . .. ... 1 ... 1 1111 1 1 0 0 .... @vcmp_scalar
+VCMPGT_scalar     1111 1110 0 . .. ... 1 ... 1 1111 0 1 1 0 .... @vcmp_scalar
+VCMPLE_scalar     1111 1110 0 . .. ... 1 ... 1 1111 1 1 1 0 .... @vcmp_scalar
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index b0b380b94b0..1a021a9a817 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -1787,15 +1787,43 @@ DO_VIWDUP_ALL(vdwdup, do_sub_wrap)
         mve_advance_vpt(env);                                           \
     }
 
-#define DO_VCMP_S(OP, FN)                       \
-    DO_VCMP(OP##b, 1, int8_t, FN)               \
-    DO_VCMP(OP##h, 2, int16_t, FN)              \
-    DO_VCMP(OP##w, 4, int32_t, FN)
+#define DO_VCMP_SCALAR(OP, ESIZE, TYPE, FN)                             \
+    void HELPER(glue(mve_, OP))(CPUARMState *env, void *vn,             \
+                                uint32_t rm)                            \
+    {                                                                   \
+        TYPE *n = vn;                                                   \
+        uint16_t mask = mve_element_mask(env);                          \
+        uint16_t eci_mask = mve_eci_mask(env);                          \
+        uint16_t beatpred = 0;                                          \
+        uint16_t emask = MAKE_64BIT_MASK(0, ESIZE);                     \
+        unsigned e;                                                     \
+        for (e = 0; e < 16 / ESIZE; e++) {                              \
+            bool r = FN(n[H##ESIZE(e)], (TYPE)rm);                      \
+            /* Comparison sets 0/1 bits for each byte in the element */ \
+            beatpred |= r * emask;                                      \
+            emask <<= ESIZE;                                            \
+        }                                                               \
+        beatpred &= mask;                                               \
+        env->v7m.vpr = (env->v7m.vpr & ~(uint32_t)eci_mask) |           \
+            (beatpred & eci_mask);                                      \
+        mve_advance_vpt(env);                                           \
+    }
 
-#define DO_VCMP_U(OP, FN)                       \
-    DO_VCMP(OP##b, 1, uint8_t, FN)              \
-    DO_VCMP(OP##h, 2, uint16_t, FN)             \
-    DO_VCMP(OP##w, 4, uint32_t, FN)
+#define DO_VCMP_S(OP, FN)                               \
+    DO_VCMP(OP##b, 1, int8_t, FN)                       \
+    DO_VCMP(OP##h, 2, int16_t, FN)                      \
+    DO_VCMP(OP##w, 4, int32_t, FN)                      \
+    DO_VCMP_SCALAR(OP##_scalarb, 1, int8_t, FN)         \
+    DO_VCMP_SCALAR(OP##_scalarh, 2, int16_t, FN)        \
+    DO_VCMP_SCALAR(OP##_scalarw, 4, int32_t, FN)
+
+#define DO_VCMP_U(OP, FN)                               \
+    DO_VCMP(OP##b, 1, uint8_t, FN)                      \
+    DO_VCMP(OP##h, 2, uint16_t, FN)                     \
+    DO_VCMP(OP##w, 4, uint32_t, FN)                     \
+    DO_VCMP_SCALAR(OP##_scalarb, 1, uint8_t, FN)        \
+    DO_VCMP_SCALAR(OP##_scalarh, 2, uint16_t, FN)       \
+    DO_VCMP_SCALAR(OP##_scalarw, 4, uint32_t, FN)
 
 #define DO_EQ(N, M) ((N) == (M))
 #define DO_NE(N, M) ((N) != (M))
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index 2d7211b5271..6c6f159aa3e 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -44,6 +44,7 @@ typedef void MVEGenOneOpImmFn(TCGv_ptr, TCGv_ptr, TCGv_i64);
 typedef void MVEGenVIDUPFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_i32, TCGv_i32);
 typedef void MVEGenVIWDUPFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_i32, TCGv_i32, TCGv_i32);
 typedef void MVEGenCmpFn(TCGv_ptr, TCGv_ptr, TCGv_ptr);
+typedef void MVEGenScalarCmpFn(TCGv_ptr, TCGv_ptr, TCGv_i32);
 
 /* Return the offset of a Qn register (same semantics as aa32_vfp_qreg()) */
 static inline long mve_qreg_offset(unsigned reg)
@@ -1209,6 +1210,37 @@ static bool do_vcmp(DisasContext *s, arg_vcmp *a, MVEGenCmpFn *fn)
     return true;
 }
 
+static bool do_vcmp_scalar(DisasContext *s, arg_vcmp_scalar *a,
+                           MVEGenScalarCmpFn *fn)
+{
+    TCGv_ptr qn;
+    TCGv_i32 rm;
+
+    if (!dc_isar_feature(aa32_mve, s) || !fn || a->rm == 13) {
+        return false;
+    }
+    if (!mve_eci_check(s) || !vfp_access_check(s)) {
+        return true;
+    }
+
+    qn = mve_qreg_ptr(a->qn);
+    if (a->rm == 15) {
+        /* Encoding Rm=0b1111 means "constant zero" */
+        rm = tcg_constant_i32(0);
+    } else {
+        rm = load_reg(s, a->rm);
+    }
+    fn(cpu_env, qn, rm);
+    tcg_temp_free_ptr(qn);
+    tcg_temp_free_i32(rm);
+    if (a->mask) {
+        /* VPT */
+        gen_vpst(s, a->mask);
+    }
+    mve_update_eci(s);
+    return true;
+}
+
 #define DO_VCMP(INSN, FN)                                       \
     static bool trans_##INSN(DisasContext *s, arg_vcmp *a)      \
     {                                                           \
@@ -1219,6 +1251,17 @@ static bool do_vcmp(DisasContext *s, arg_vcmp *a, MVEGenCmpFn *fn)
             NULL,                                               \
         };                                                      \
         return do_vcmp(s, a, fns[a->size]);                     \
+    }                                                           \
+    static bool trans_##INSN##_scalar(DisasContext *s,          \
+                                      arg_vcmp_scalar *a)       \
+    {                                                           \
+        static MVEGenScalarCmpFn * const fns[] = {              \
+            gen_helper_mve_##FN##_scalarb,                      \
+            gen_helper_mve_##FN##_scalarh,                      \
+            gen_helper_mve_##FN##_scalarw,                      \
+            NULL,                                               \
+        };                                                      \
+        return do_vcmp_scalar(s, a, fns[a->size]);              \
     }
 
 DO_VCMP(VCMPEQ, vcmpeq)
-- 
2.20.1

[PULL 17/44] target/arm: Implement MVE VPSEL

[Peter Maydell]

Implement the MVE VPSEL insn, which sets each byte of the destination
vector Qd to the byte from either Qn or Qm depending on the value of
the corresponding bit in VPR.P0.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    |  2 ++
 target/arm/mve.decode      |  7 +++++--
 target/arm/mve_helper.c    | 19 +++++++++++++++++++
 target/arm/translate-mve.c |  2 ++
 4 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index 4f9903e66ef..16c4c3b8f61 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -82,6 +82,8 @@ DEF_HELPER_FLAGS_4(mve_vorr, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 DEF_HELPER_FLAGS_4(mve_vorn, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 DEF_HELPER_FLAGS_4(mve_veor, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 
+DEF_HELPER_FLAGS_4(mve_vpsel, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
+
 DEF_HELPER_FLAGS_4(mve_vaddb, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 DEF_HELPER_FLAGS_4(mve_vaddh, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 DEF_HELPER_FLAGS_4(mve_vaddw, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index ef708ba80ff..4bd20a9a319 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -468,8 +468,11 @@ VSHLC             111 0 1110 1 . 1 imm:5 ... 0 1111 1100 rdm:4 qd=%qd
 # effectively "VCMP then VPST". A plain "VCMP" has a mask field of zero.
 VCMPEQ            1111 1110 0 . .. ... 1 ... 0 1111 0 0 . 0 ... 0 @vcmp
 VCMPNE            1111 1110 0 . .. ... 1 ... 0 1111 1 0 . 0 ... 0 @vcmp
-VCMPCS            1111 1110 0 . .. ... 1 ... 0 1111 0 0 . 0 ... 1 @vcmp
-VCMPHI            1111 1110 0 . .. ... 1 ... 0 1111 1 0 . 0 ... 1 @vcmp
+{
+  VPSEL           1111 1110 0 . 11 ... 1 ... 0 1111 . 0 . 0 ... 1 @2op_nosz
+  VCMPCS          1111 1110 0 . .. ... 1 ... 0 1111 0 0 . 0 ... 1 @vcmp
+  VCMPHI          1111 1110 0 . .. ... 1 ... 0 1111 1 0 . 0 ... 1 @vcmp
+}
 VCMPGE            1111 1110 0 . .. ... 1 ... 1 1111 0 0 . 0 ... 0 @vcmp
 VCMPLT            1111 1110 0 . .. ... 1 ... 1 1111 1 0 . 0 ... 0 @vcmp
 VCMPGT            1111 1110 0 . .. ... 1 ... 1 1111 0 0 . 0 ... 1 @vcmp
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index 1a021a9a817..03171766b57 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -1842,3 +1842,22 @@ DO_VCMP_S(vcmpge, DO_GE)
 DO_VCMP_S(vcmplt, DO_LT)
 DO_VCMP_S(vcmpgt, DO_GT)
 DO_VCMP_S(vcmple, DO_LE)
+
+void HELPER(mve_vpsel)(CPUARMState *env, void *vd, void *vn, void *vm)
+{
+    /*
+     * Qd[n] = VPR.P0[n] ? Qn[n] : Qm[n]
+     * but note that whether bytes are written to Qd is still subject
+     * to (all forms of) predication in the usual way.
+     */
+    uint64_t *d = vd, *n = vn, *m = vm;
+    uint16_t mask = mve_element_mask(env);
+    uint16_t p0 = FIELD_EX32(env->v7m.vpr, V7M_VPR, P0);
+    unsigned e;
+    for (e = 0; e < 16 / 8; e++, mask >>= 8, p0 >>= 8) {
+        uint64_t r = m[H8(e)];
+        mergemask(&r, n[H8(e)], p0);
+        mergemask(&d[H8(e)], r, mask);
+    }
+    mve_advance_vpt(env);
+}
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index 6c6f159aa3e..aa38218e08f 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -376,6 +376,8 @@ DO_LOGIC(VORR, gen_helper_mve_vorr)
 DO_LOGIC(VORN, gen_helper_mve_vorn)
 DO_LOGIC(VEOR, gen_helper_mve_veor)
 
+DO_LOGIC(VPSEL, gen_helper_mve_vpsel)
+
 #define DO_2OP(INSN, FN) \
     static bool trans_##INSN(DisasContext *s, arg_2op *a)       \
     {                                                           \
-- 
2.20.1

[PULL 18/44] target/arm: Implement MVE VMLAS

[Peter Maydell]

Implement the MVE VMLAS insn, which multiplies a vector by a vector
and adds a scalar.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    |  4 ++++
 target/arm/mve.decode      |  3 +++
 target/arm/mve_helper.c    | 26 ++++++++++++++++++++++++++
 target/arm/translate-mve.c |  1 +
 4 files changed, 34 insertions(+)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index 16c4c3b8f61..715b1bbd012 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -347,6 +347,10 @@ DEF_HELPER_FLAGS_4(mve_vqdmullb_scalarw, TCG_CALL_NO_WG, void, env, ptr, ptr, i3
 DEF_HELPER_FLAGS_4(mve_vqdmullt_scalarh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(mve_vqdmullt_scalarw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 
+DEF_HELPER_FLAGS_4(mve_vmlasb, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmlash, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmlasw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+
 DEF_HELPER_FLAGS_4(mve_vmlaldavsh, TCG_CALL_NO_WG, i64, env, ptr, ptr, i64)
 DEF_HELPER_FLAGS_4(mve_vmlaldavsw, TCG_CALL_NO_WG, i64, env, ptr, ptr, i64)
 DEF_HELPER_FLAGS_4(mve_vmlaldavxsh, TCG_CALL_NO_WG, i64, env, ptr, ptr, i64)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index 4bd20a9a319..226b74790b3 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -345,6 +345,9 @@ VBRSR            1111 1110 0 . .. ... 1 ... 1 1110 . 110 .... @2scalar
 VQDMULH_scalar   1110 1110 0 . .. ... 1 ... 0 1110 . 110 .... @2scalar
 VQRDMULH_scalar  1111 1110 0 . .. ... 1 ... 0 1110 . 110 .... @2scalar
 
+# The U bit (28) is don't-care because it does not affect the result
+VMLAS            111- 1110 0 . .. ... 1 ... 1 1110 . 100 .... @2scalar
+
 # Vector add across vector
 {
   VADDV          111 u:1 1110 1111 size:2 01 ... 0 1111 0 0 a:1 0 qm:3 0 rda=%rdalo
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index 03171766b57..ab02a1e60f4 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -948,6 +948,22 @@ DO_VQDMLADH_OP(vqrdmlsdhxw, 4, int32_t, 1, 1, do_vqdmlsdh_w)
         mve_advance_vpt(env);                                           \
     }
 
+/* "accumulating" version where FN takes d as well as n and m */
+#define DO_2OP_ACC_SCALAR(OP, ESIZE, TYPE, FN)                          \
+    void HELPER(glue(mve_, OP))(CPUARMState *env, void *vd, void *vn,   \
+                                uint32_t rm)                            \
+    {                                                                   \
+        TYPE *d = vd, *n = vn;                                          \
+        TYPE m = rm;                                                    \
+        uint16_t mask = mve_element_mask(env);                          \
+        unsigned e;                                                     \
+        for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) {              \
+            mergemask(&d[H##ESIZE(e)],                                  \
+                      FN(d[H##ESIZE(e)], n[H##ESIZE(e)], m), mask);     \
+        }                                                               \
+        mve_advance_vpt(env);                                           \
+    }
+
 /* provide unsigned 2-op scalar helpers for all sizes */
 #define DO_2OP_SCALAR_U(OP, FN)                 \
     DO_2OP_SCALAR(OP##b, 1, uint8_t, FN)        \
@@ -958,6 +974,11 @@ DO_VQDMLADH_OP(vqrdmlsdhxw, 4, int32_t, 1, 1, do_vqdmlsdh_w)
     DO_2OP_SCALAR(OP##h, 2, int16_t, FN)        \
     DO_2OP_SCALAR(OP##w, 4, int32_t, FN)
 
+#define DO_2OP_ACC_SCALAR_U(OP, FN)             \
+    DO_2OP_ACC_SCALAR(OP##b, 1, uint8_t, FN)    \
+    DO_2OP_ACC_SCALAR(OP##h, 2, uint16_t, FN)   \
+    DO_2OP_ACC_SCALAR(OP##w, 4, uint32_t, FN)
+
 DO_2OP_SCALAR_U(vadd_scalar, DO_ADD)
 DO_2OP_SCALAR_U(vsub_scalar, DO_SUB)
 DO_2OP_SCALAR_U(vmul_scalar, DO_MUL)
@@ -987,6 +1008,11 @@ DO_2OP_SAT_SCALAR(vqrdmulh_scalarb, 1, int8_t, DO_QRDMULH_B)
 DO_2OP_SAT_SCALAR(vqrdmulh_scalarh, 2, int16_t, DO_QRDMULH_H)
 DO_2OP_SAT_SCALAR(vqrdmulh_scalarw, 4, int32_t, DO_QRDMULH_W)
 
+/* Vector by vector plus scalar */
+#define DO_VMLAS(D, N, M) ((N) * (D) + (M))
+
+DO_2OP_ACC_SCALAR_U(vmlas, DO_VMLAS)
+
 /*
  * Long saturating scalar ops. As with DO_2OP_L, TYPE and H are for the
  * input (smaller) type and LESIZE, LTYPE, LH for the output (long) type.
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index aa38218e08f..b56c91db2ab 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -596,6 +596,7 @@ DO_2OP_SCALAR(VQSUB_U_scalar, vqsubu_scalar)
 DO_2OP_SCALAR(VQDMULH_scalar, vqdmulh_scalar)
 DO_2OP_SCALAR(VQRDMULH_scalar, vqrdmulh_scalar)
 DO_2OP_SCALAR(VBRSR, vbrsr)
+DO_2OP_SCALAR(VMLAS, vmlas)
 
 static bool trans_VQDMULLB_scalar(DisasContext *s, arg_2scalar *a)
 {
-- 
2.20.1

[PULL 19/44] target/arm: Implement MVE shift-by-scalar

[Peter Maydell]

Implement the MVE instructions which perform shifts by a scalar.
These are VSHL T2, VRSHL T2, VQSHL T1 and VQRSHL T2.  They take the
shift amount in a general purpose register and shift every element in
the vector by that amount.

Mostly we can reuse the helper functions for shift-by-immediate; we
do need two new helpers for VQRSHL.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    |  8 +++++++
 target/arm/mve.decode      | 23 ++++++++++++++++---
 target/arm/mve_helper.c    |  2 ++
 target/arm/translate-mve.c | 46 ++++++++++++++++++++++++++++++++++++++
 4 files changed, 76 insertions(+), 3 deletions(-)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index 715b1bbd012..0ee5ea3cabd 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -414,6 +414,14 @@ DEF_HELPER_FLAGS_4(mve_vrshli_ub, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(mve_vrshli_uh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(mve_vrshli_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 
+DEF_HELPER_FLAGS_4(mve_vqrshli_sb, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vqrshli_sh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vqrshli_sw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_4(mve_vqrshli_ub, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vqrshli_uh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vqrshli_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+
 DEF_HELPER_FLAGS_4(mve_vshllbsb, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(mve_vshllbsh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(mve_vshllbub, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index 226b74790b3..eb26b103d12 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -39,6 +39,7 @@
 &viwdup qd rn rm size imm
 &vcmp qm qn size mask
 &vcmp_scalar qn rm size mask
+&shl_scalar qda rm size
 
 @vldr_vstr ....... . . . . l:1 rn:4 ... ...... imm:7 &vldr_vstr qd=%qd u=0
 # Note that both Rn and Qd are 3 bits only (no D bit)
@@ -88,6 +89,8 @@
 @2_shr_w .... .... .. 1 ..... .... .... .... .... &2shift qd=%qd qm=%qm \
          size=2 shift=%rshift_i5
 
+@shl_scalar .... .... .... size:2 .. .... .... .... rm:4 &shl_scalar qda=%qd
+
 # Vector comparison; 4-bit Qm but 3-bit Qn
 %mask_22_13      22:1 13:3
 @vcmp    .... .... .. size:2 qn:3 . .... .... .... .... &vcmp qm=%qm mask=%mask_22_13
@@ -320,7 +323,23 @@ VRMLSLDAVH       1111 1110 1 ... ... 0 ... x:1 1110 . 0 a:1 0 ... 1 @vmlaldav_no
 
 VADD_scalar      1110 1110 0 . .. ... 1 ... 0 1111 . 100 .... @2scalar
 VSUB_scalar      1110 1110 0 . .. ... 1 ... 1 1111 . 100 .... @2scalar
-VMUL_scalar      1110 1110 0 . .. ... 1 ... 1 1110 . 110 .... @2scalar
+
+{
+  VSHL_S_scalar   1110 1110 0 . 11 .. 01 ... 1 1110 0110 .... @shl_scalar
+  VRSHL_S_scalar  1110 1110 0 . 11 .. 11 ... 1 1110 0110 .... @shl_scalar
+  VQSHL_S_scalar  1110 1110 0 . 11 .. 01 ... 1 1110 1110 .... @shl_scalar
+  VQRSHL_S_scalar 1110 1110 0 . 11 .. 11 ... 1 1110 1110 .... @shl_scalar
+  VMUL_scalar     1110 1110 0 . .. ... 1 ... 1 1110 . 110 .... @2scalar
+}
+
+{
+  VSHL_U_scalar   1111 1110 0 . 11 .. 01 ... 1 1110 0110 .... @shl_scalar
+  VRSHL_U_scalar  1111 1110 0 . 11 .. 11 ... 1 1110 0110 .... @shl_scalar
+  VQSHL_U_scalar  1111 1110 0 . 11 .. 01 ... 1 1110 1110 .... @shl_scalar
+  VQRSHL_U_scalar 1111 1110 0 . 11 .. 11 ... 1 1110 1110 .... @shl_scalar
+  VBRSR           1111 1110 0 . .. ... 1 ... 1 1110 . 110 .... @2scalar
+}
+
 VHADD_S_scalar   1110 1110 0 . .. ... 0 ... 0 1111 . 100 .... @2scalar
 VHADD_U_scalar   1111 1110 0 . .. ... 0 ... 0 1111 . 100 .... @2scalar
 VHSUB_S_scalar   1110 1110 0 . .. ... 0 ... 1 1111 . 100 .... @2scalar
@@ -340,8 +359,6 @@ VHSUB_U_scalar   1111 1110 0 . .. ... 0 ... 1 1111 . 100 .... @2scalar
                   size=%size_28
 }
 
-VBRSR            1111 1110 0 . .. ... 1 ... 1 1110 . 110 .... @2scalar
-
 VQDMULH_scalar   1110 1110 0 . .. ... 1 ... 0 1110 . 110 .... @2scalar
 VQRDMULH_scalar  1111 1110 0 . .. ... 1 ... 0 1110 . 110 .... @2scalar
 
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index ab02a1e60f4..ac608fc524b 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -1334,6 +1334,8 @@ DO_2SHIFT_SAT_S(vqshli_s, DO_SQSHL_OP)
 DO_2SHIFT_SAT_S(vqshlui_s, DO_SUQSHL_OP)
 DO_2SHIFT_U(vrshli_u, DO_VRSHLU)
 DO_2SHIFT_S(vrshli_s, DO_VRSHLS)
+DO_2SHIFT_SAT_U(vqrshli_u, DO_UQRSHL_OP)
+DO_2SHIFT_SAT_S(vqrshli_s, DO_SQRSHL_OP)
 
 /* Shift-and-insert; we always work with 64 bits at a time */
 #define DO_2SHIFT_INSERT(OP, ESIZE, SHIFTFN, MASKFN)                    \
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index b56c91db2ab..44731fc4eb7 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -1003,6 +1003,52 @@ DO_2SHIFT(VRSHRI_U, vrshli_u, true)
 DO_2SHIFT(VSRI, vsri, false)
 DO_2SHIFT(VSLI, vsli, false)
 
+static bool do_2shift_scalar(DisasContext *s, arg_shl_scalar *a,
+                             MVEGenTwoOpShiftFn *fn)
+{
+    TCGv_ptr qda;
+    TCGv_i32 rm;
+
+    if (!dc_isar_feature(aa32_mve, s) ||
+        !mve_check_qreg_bank(s, a->qda) ||
+        a->rm == 13 || a->rm == 15 || !fn) {
+        /* Rm cases are UNPREDICTABLE */
+        return false;
+    }
+    if (!mve_eci_check(s) || !vfp_access_check(s)) {
+        return true;
+    }
+
+    qda = mve_qreg_ptr(a->qda);
+    rm = load_reg(s, a->rm);
+    fn(cpu_env, qda, qda, rm);
+    tcg_temp_free_ptr(qda);
+    tcg_temp_free_i32(rm);
+    mve_update_eci(s);
+    return true;
+}
+
+#define DO_2SHIFT_SCALAR(INSN, FN)                                      \
+    static bool trans_##INSN(DisasContext *s, arg_shl_scalar *a)        \
+    {                                                                   \
+        static MVEGenTwoOpShiftFn * const fns[] = {                     \
+            gen_helper_mve_##FN##b,                                     \
+            gen_helper_mve_##FN##h,                                     \
+            gen_helper_mve_##FN##w,                                     \
+            NULL,                                                       \
+        };                                                              \
+        return do_2shift_scalar(s, a, fns[a->size]);                    \
+    }
+
+DO_2SHIFT_SCALAR(VSHL_S_scalar, vshli_s)
+DO_2SHIFT_SCALAR(VSHL_U_scalar, vshli_u)
+DO_2SHIFT_SCALAR(VRSHL_S_scalar, vrshli_s)
+DO_2SHIFT_SCALAR(VRSHL_U_scalar, vrshli_u)
+DO_2SHIFT_SCALAR(VQSHL_S_scalar, vqshli_s)
+DO_2SHIFT_SCALAR(VQSHL_U_scalar, vqshli_u)
+DO_2SHIFT_SCALAR(VQRSHL_S_scalar, vqrshli_s)
+DO_2SHIFT_SCALAR(VQRSHL_U_scalar, vqrshli_u)
+
 #define DO_VSHLL(INSN, FN)                                      \
     static bool trans_##INSN(DisasContext *s, arg_2shift *a)    \
     {                                                           \
-- 
2.20.1

[PULL 20/44] target/arm: Move 'x' and 'a' bit definitions into vmlaldav formats

[Peter Maydell]

All the users of the vmlaldav formats have an 'x bit in bit 12 and an
'a' bit in bit 5; move these to the format rather than specifying them
in each insn pattern.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/mve.decode | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index eb26b103d12..bdcd660aaf4 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -305,19 +305,19 @@ VDUP             1110 1110 1 0 10 ... 0 .... 1011 . 0 0 1 0000 @vdup size=2
 
 &vmlaldav rdahi rdalo size qn qm x a
 
-@vmlaldav        .... .... . ... ... . ... . .... .... qm:3 . \
+@vmlaldav        .... .... . ... ... . ... x:1 .... .. a:1 . qm:3 . \
                  qn=%qn rdahi=%rdahi rdalo=%rdalo size=%size_16 &vmlaldav
-@vmlaldav_nosz   .... .... . ... ... . ... . .... .... qm:3 . \
+@vmlaldav_nosz   .... .... . ... ... . ... x:1 .... .. a:1 . qm:3 . \
                  qn=%qn rdahi=%rdahi rdalo=%rdalo size=0 &vmlaldav
-VMLALDAV_S       1110 1110 1 ... ... . ... x:1 1110 . 0 a:1 0 ... 0 @vmlaldav
-VMLALDAV_U       1111 1110 1 ... ... . ... x:1 1110 . 0 a:1 0 ... 0 @vmlaldav
+VMLALDAV_S       1110 1110 1 ... ... . ... . 1110 . 0 . 0 ... 0 @vmlaldav
+VMLALDAV_U       1111 1110 1 ... ... . ... . 1110 . 0 . 0 ... 0 @vmlaldav
 
-VMLSLDAV         1110 1110 1 ... ... . ... x:1 1110 . 0 a:1 0 ... 1 @vmlaldav
+VMLSLDAV         1110 1110 1 ... ... . ... . 1110 . 0 . 0 ... 1 @vmlaldav
 
-VRMLALDAVH_S     1110 1110 1 ... ... 0 ... x:1 1111 . 0 a:1 0 ... 0 @vmlaldav_nosz
-VRMLALDAVH_U     1111 1110 1 ... ... 0 ... x:1 1111 . 0 a:1 0 ... 0 @vmlaldav_nosz
+VRMLALDAVH_S     1110 1110 1 ... ... 0 ... . 1111 . 0 . 0 ... 0 @vmlaldav_nosz
+VRMLALDAVH_U     1111 1110 1 ... ... 0 ... . 1111 . 0 . 0 ... 0 @vmlaldav_nosz
 
-VRMLSLDAVH       1111 1110 1 ... ... 0 ... x:1 1110 . 0 a:1 0 ... 1 @vmlaldav_nosz
+VRMLSLDAVH       1111 1110 1 ... ... 0 ... . 1110 . 0 . 0 ... 1 @vmlaldav_nosz
 
 # Scalar operations
 
-- 
2.20.1

[PULL 21/44] target/arm: Implement MVE integer min/max across vector

[Peter Maydell]

Implement the MVE integer min/max across vector insns
VMAXV, VMINV, VMAXAV and VMINAV, which find the maximum
from the vector elements and a general purpose register,
and store the maximum back into the general purpose
register.

These insns overlap with VRMLALDAVH (they use what would
be RdaHi=0b110).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    | 20 ++++++++++++
 target/arm/mve.decode      | 18 +++++++++--
 target/arm/mve_helper.c    | 66 ++++++++++++++++++++++++++++++++++++++
 target/arm/translate-mve.c | 48 +++++++++++++++++++++++++++
 4 files changed, 150 insertions(+), 2 deletions(-)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index 0ee5ea3cabd..2c66fcba792 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -379,6 +379,26 @@ DEF_HELPER_FLAGS_3(mve_vaddvuh, TCG_CALL_NO_WG, i32, env, ptr, i32)
 DEF_HELPER_FLAGS_3(mve_vaddvsw, TCG_CALL_NO_WG, i32, env, ptr, i32)
 DEF_HELPER_FLAGS_3(mve_vaddvuw, TCG_CALL_NO_WG, i32, env, ptr, i32)
 
+DEF_HELPER_FLAGS_3(mve_vmaxvsb, TCG_CALL_NO_WG, i32, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vmaxvsh, TCG_CALL_NO_WG, i32, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vmaxvsw, TCG_CALL_NO_WG, i32, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vmaxvub, TCG_CALL_NO_WG, i32, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vmaxvuh, TCG_CALL_NO_WG, i32, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vmaxvuw, TCG_CALL_NO_WG, i32, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vmaxavb, TCG_CALL_NO_WG, i32, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vmaxavh, TCG_CALL_NO_WG, i32, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vmaxavw, TCG_CALL_NO_WG, i32, env, ptr, i32)
+
+DEF_HELPER_FLAGS_3(mve_vminvsb, TCG_CALL_NO_WG, i32, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vminvsh, TCG_CALL_NO_WG, i32, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vminvsw, TCG_CALL_NO_WG, i32, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vminvub, TCG_CALL_NO_WG, i32, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vminvuh, TCG_CALL_NO_WG, i32, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vminvuw, TCG_CALL_NO_WG, i32, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vminavb, TCG_CALL_NO_WG, i32, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vminavh, TCG_CALL_NO_WG, i32, env, ptr, i32)
+DEF_HELPER_FLAGS_3(mve_vminavw, TCG_CALL_NO_WG, i32, env, ptr, i32)
+
 DEF_HELPER_FLAGS_3(mve_vaddlv_s, TCG_CALL_NO_WG, i64, env, ptr, i64)
 DEF_HELPER_FLAGS_3(mve_vaddlv_u, TCG_CALL_NO_WG, i64, env, ptr, i64)
 
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index bdcd660aaf4..83dc0300d69 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -40,6 +40,7 @@
 &vcmp qm qn size mask
 &vcmp_scalar qn rm size mask
 &shl_scalar qda rm size
+&vmaxv qm rda size
 
 @vldr_vstr ....... . . . . l:1 rn:4 ... ...... imm:7 &vldr_vstr qd=%qd u=0
 # Note that both Rn and Qd are 3 bits only (no D bit)
@@ -97,6 +98,8 @@
 @vcmp_scalar .... .... .. size:2 qn:3 . .... .... .... rm:4 &vcmp_scalar \
              mask=%mask_22_13
 
+@vmaxv .... .... .... size:2 .. rda:4 .... .... .... &vmaxv qm=%qm
+
 # Vector loads and stores
 
 # Widening loads and narrowing stores:
@@ -314,8 +317,19 @@ VMLALDAV_U       1111 1110 1 ... ... . ... . 1110 . 0 . 0 ... 0 @vmlaldav
 
 VMLSLDAV         1110 1110 1 ... ... . ... . 1110 . 0 . 0 ... 1 @vmlaldav
 
-VRMLALDAVH_S     1110 1110 1 ... ... 0 ... . 1111 . 0 . 0 ... 0 @vmlaldav_nosz
-VRMLALDAVH_U     1111 1110 1 ... ... 0 ... . 1111 . 0 . 0 ... 0 @vmlaldav_nosz
+{
+  VMAXV_S        1110 1110 1110  .. 10 ....  1111 0 0 . 0 ... 0 @vmaxv
+  VMINV_S        1110 1110 1110  .. 10 ....  1111 1 0 . 0 ... 0 @vmaxv
+  VMAXAV         1110 1110 1110  .. 00 ....  1111 0 0 . 0 ... 0 @vmaxv
+  VMINAV         1110 1110 1110  .. 00 ....  1111 1 0 . 0 ... 0 @vmaxv
+  VRMLALDAVH_S   1110 1110 1 ... ... 0 ... . 1111 . 0 . 0 ... 0 @vmlaldav_nosz
+}
+
+{
+  VMAXV_U        1111 1110 1110  .. 10 ....  1111 0 0 . 0 ... 0 @vmaxv
+  VMINV_U        1111 1110 1110  .. 10 ....  1111 1 0 . 0 ... 0 @vmaxv
+  VRMLALDAVH_U   1111 1110 1 ... ... 0 ... . 1111 . 0 . 0 ... 0 @vmlaldav_nosz
+}
 
 VRMLSLDAVH       1111 1110 1 ... ... 0 ... . 1110 . 0 . 0 ... 1 @vmlaldav_nosz
 
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index ac608fc524b..924ad7f2bdc 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -1254,6 +1254,72 @@ DO_VADDV(vaddvub, 1, uint8_t)
 DO_VADDV(vaddvuh, 2, uint16_t)
 DO_VADDV(vaddvuw, 4, uint32_t)
 
+/*
+ * Vector max/min across vector. Unlike VADDV, we must
+ * read ra as the element size, not its full width.
+ * We work with int64_t internally for simplicity.
+ */
+#define DO_VMAXMINV(OP, ESIZE, TYPE, RATYPE, FN)                \
+    uint32_t HELPER(glue(mve_, OP))(CPUARMState *env, void *vm, \
+                                    uint32_t ra_in)             \
+    {                                                           \
+        uint16_t mask = mve_element_mask(env);                  \
+        unsigned e;                                             \
+        TYPE *m = vm;                                           \
+        int64_t ra = (RATYPE)ra_in;                             \
+        for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) {      \
+            if (mask & 1) {                                     \
+                ra = FN(ra, m[H##ESIZE(e)]);                    \
+            }                                                   \
+        }                                                       \
+        mve_advance_vpt(env);                                   \
+        return ra;                                              \
+    }                                                           \
+
+#define DO_VMAXMINV_U(INSN, FN)                         \
+    DO_VMAXMINV(INSN##b, 1, uint8_t, uint8_t, FN)       \
+    DO_VMAXMINV(INSN##h, 2, uint16_t, uint16_t, FN)     \
+    DO_VMAXMINV(INSN##w, 4, uint32_t, uint32_t, FN)
+#define DO_VMAXMINV_S(INSN, FN)                         \
+    DO_VMAXMINV(INSN##b, 1, int8_t, int8_t, FN)         \
+    DO_VMAXMINV(INSN##h, 2, int16_t, int16_t, FN)       \
+    DO_VMAXMINV(INSN##w, 4, int32_t, int32_t, FN)
+
+/*
+ * Helpers for max and min of absolute values across vector:
+ * note that we only take the absolute value of 'm', not 'n'
+ */
+static int64_t do_maxa(int64_t n, int64_t m)
+{
+    if (m < 0) {
+        m = -m;
+    }
+    return MAX(n, m);
+}
+
+static int64_t do_mina(int64_t n, int64_t m)
+{
+    if (m < 0) {
+        m = -m;
+    }
+    return MIN(n, m);
+}
+
+DO_VMAXMINV_S(vmaxvs, DO_MAX)
+DO_VMAXMINV_U(vmaxvu, DO_MAX)
+DO_VMAXMINV_S(vminvs, DO_MIN)
+DO_VMAXMINV_U(vminvu, DO_MIN)
+/*
+ * VMAXAV, VMINAV treat the general purpose input as unsigned
+ * and the vector elements as signed.
+ */
+DO_VMAXMINV(vmaxavb, 1, int8_t, uint8_t, do_maxa)
+DO_VMAXMINV(vmaxavh, 2, int16_t, uint16_t, do_maxa)
+DO_VMAXMINV(vmaxavw, 4, int32_t, uint32_t, do_maxa)
+DO_VMAXMINV(vminavb, 1, int8_t, uint8_t, do_mina)
+DO_VMAXMINV(vminavh, 2, int16_t, uint16_t, do_mina)
+DO_VMAXMINV(vminavw, 4, int32_t, uint32_t, do_mina)
+
 #define DO_VADDLV(OP, TYPE, LTYPE)                              \
     uint64_t HELPER(glue(mve_, OP))(CPUARMState *env, void *vm, \
                                     uint64_t ra)                \
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index 44731fc4eb7..2fce74f86ab 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -1321,3 +1321,51 @@ DO_VCMP(VCMPGE, vcmpge)
 DO_VCMP(VCMPLT, vcmplt)
 DO_VCMP(VCMPGT, vcmpgt)
 DO_VCMP(VCMPLE, vcmple)
+
+static bool do_vmaxv(DisasContext *s, arg_vmaxv *a, MVEGenVADDVFn fn)
+{
+    /*
+     * MIN/MAX operations across a vector: compute the min or
+     * max of the initial value in a general purpose register
+     * and all the elements in the vector, and store it back
+     * into the general purpose register.
+     */
+    TCGv_ptr qm;
+    TCGv_i32 rda;
+
+    if (!dc_isar_feature(aa32_mve, s) || !mve_check_qreg_bank(s, a->qm) ||
+        !fn || a->rda == 13 || a->rda == 15) {
+        /* Rda cases are UNPREDICTABLE */
+        return false;
+    }
+    if (!mve_eci_check(s) || !vfp_access_check(s)) {
+        return true;
+    }
+
+    qm = mve_qreg_ptr(a->qm);
+    rda = load_reg(s, a->rda);
+    fn(rda, cpu_env, qm, rda);
+    store_reg(s, a->rda, rda);
+    tcg_temp_free_ptr(qm);
+    mve_update_eci(s);
+    return true;
+}
+
+#define DO_VMAXV(INSN, FN)                                      \
+    static bool trans_##INSN(DisasContext *s, arg_vmaxv *a)     \
+    {                                                           \
+        static MVEGenVADDVFn * const fns[] = {                  \
+            gen_helper_mve_##FN##b,                             \
+            gen_helper_mve_##FN##h,                             \
+            gen_helper_mve_##FN##w,                             \
+            NULL,                                               \
+        };                                                      \
+        return do_vmaxv(s, a, fns[a->size]);                    \
+    }
+
+DO_VMAXV(VMAXV_S, vmaxvs)
+DO_VMAXV(VMAXV_U, vmaxvu)
+DO_VMAXV(VMAXAV, vmaxav)
+DO_VMAXV(VMINV_S, vminvs)
+DO_VMAXV(VMINV_U, vminvu)
+DO_VMAXV(VMINAV, vminav)
-- 
2.20.1

[PULL 22/44] target/arm: Implement MVE VABAV

[Peter Maydell]

Implement the MVE VABAV insn, which computes absolute differences
between elements of two vectors and accumulates the result into
a general purpose register.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    |  7 +++++++
 target/arm/mve.decode      |  6 ++++++
 target/arm/mve_helper.c    | 26 +++++++++++++++++++++++
 target/arm/translate-mve.c | 43 ++++++++++++++++++++++++++++++++++++++
 4 files changed, 82 insertions(+)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index 2c66fcba792..c7e7aab2cbb 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -402,6 +402,13 @@ DEF_HELPER_FLAGS_3(mve_vminavw, TCG_CALL_NO_WG, i32, env, ptr, i32)
 DEF_HELPER_FLAGS_3(mve_vaddlv_s, TCG_CALL_NO_WG, i64, env, ptr, i64)
 DEF_HELPER_FLAGS_3(mve_vaddlv_u, TCG_CALL_NO_WG, i64, env, ptr, i64)
 
+DEF_HELPER_FLAGS_4(mve_vabavsb, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vabavsh, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vabavsw, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vabavub, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vabavuh, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vabavuw, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+
 DEF_HELPER_FLAGS_3(mve_vmovi, TCG_CALL_NO_WG, void, env, ptr, i64)
 DEF_HELPER_FLAGS_3(mve_vandi, TCG_CALL_NO_WG, void, env, ptr, i64)
 DEF_HELPER_FLAGS_3(mve_vorri, TCG_CALL_NO_WG, void, env, ptr, i64)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index 83dc0300d69..c8a06edca78 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -41,6 +41,7 @@
 &vcmp_scalar qn rm size mask
 &shl_scalar qda rm size
 &vmaxv qm rda size
+&vabav qn qm rda size
 
 @vldr_vstr ....... . . . . l:1 rn:4 ... ...... imm:7 &vldr_vstr qd=%qd u=0
 # Note that both Rn and Qd are 3 bits only (no D bit)
@@ -386,6 +387,11 @@ VMLAS            111- 1110 0 . .. ... 1 ... 1 1110 . 100 .... @2scalar
                  rdahi=%rdahi rdalo=%rdalo
 }
 
+@vabav           .... .... .. size:2 .... rda:4 .... .... .... &vabav qn=%qn qm=%qm
+
+VABAV_S          111 0 1110 10 .. ... 0 .... 1111 . 0 . 0 ... 1 @vabav
+VABAV_U          111 1 1110 10 .. ... 0 .... 1111 . 0 . 0 ... 1 @vabav
+
 # Logical immediate operations (1 reg and modified-immediate)
 
 # The cmode/op bits here decode VORR/VBIC/VMOV/VMVN, but
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index 924ad7f2bdc..fed0f3cd610 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -1320,6 +1320,32 @@ DO_VMAXMINV(vminavb, 1, int8_t, uint8_t, do_mina)
 DO_VMAXMINV(vminavh, 2, int16_t, uint16_t, do_mina)
 DO_VMAXMINV(vminavw, 4, int32_t, uint32_t, do_mina)
 
+#define DO_VABAV(OP, ESIZE, TYPE)                               \
+    uint32_t HELPER(glue(mve_, OP))(CPUARMState *env, void *vn, \
+                                    void *vm, uint32_t ra)      \
+    {                                                           \
+        uint16_t mask = mve_element_mask(env);                  \
+        unsigned e;                                             \
+        TYPE *m = vm, *n = vn;                                  \
+        for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) {      \
+            if (mask & 1) {                                     \
+                int64_t n0 = n[H##ESIZE(e)];                    \
+                int64_t m0 = m[H##ESIZE(e)];                    \
+                uint32_t r = n0 >= m0 ? (n0 - m0) : (m0 - n0);  \
+                ra += r;                                        \
+            }                                                   \
+        }                                                       \
+        mve_advance_vpt(env);                                   \
+        return ra;                                              \
+    }
+
+DO_VABAV(vabavsb, 1, int8_t)
+DO_VABAV(vabavsh, 2, int16_t)
+DO_VABAV(vabavsw, 4, int32_t)
+DO_VABAV(vabavub, 1, uint8_t)
+DO_VABAV(vabavuh, 2, uint16_t)
+DO_VABAV(vabavuw, 4, uint32_t)
+
 #define DO_VADDLV(OP, TYPE, LTYPE)                              \
     uint64_t HELPER(glue(mve_, OP))(CPUARMState *env, void *vm, \
                                     uint64_t ra)                \
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index 2fce74f86ab..247f6719e6f 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -45,6 +45,7 @@ typedef void MVEGenVIDUPFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_i32, TCGv_i32);
 typedef void MVEGenVIWDUPFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_i32, TCGv_i32, TCGv_i32);
 typedef void MVEGenCmpFn(TCGv_ptr, TCGv_ptr, TCGv_ptr);
 typedef void MVEGenScalarCmpFn(TCGv_ptr, TCGv_ptr, TCGv_i32);
+typedef void MVEGenVABAVFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_i32);
 
 /* Return the offset of a Qn register (same semantics as aa32_vfp_qreg()) */
 static inline long mve_qreg_offset(unsigned reg)
@@ -1369,3 +1370,45 @@ DO_VMAXV(VMAXAV, vmaxav)
 DO_VMAXV(VMINV_S, vminvs)
 DO_VMAXV(VMINV_U, vminvu)
 DO_VMAXV(VMINAV, vminav)
+
+static bool do_vabav(DisasContext *s, arg_vabav *a, MVEGenVABAVFn *fn)
+{
+    /* Absolute difference accumulated across vector */
+    TCGv_ptr qn, qm;
+    TCGv_i32 rda;
+
+    if (!dc_isar_feature(aa32_mve, s) ||
+        !mve_check_qreg_bank(s, a->qm | a->qn) ||
+        !fn || a->rda == 13 || a->rda == 15) {
+        /* Rda cases are UNPREDICTABLE */
+        return false;
+    }
+    if (!mve_eci_check(s) || !vfp_access_check(s)) {
+        return true;
+    }
+
+    qm = mve_qreg_ptr(a->qm);
+    qn = mve_qreg_ptr(a->qn);
+    rda = load_reg(s, a->rda);
+    fn(rda, cpu_env, qn, qm, rda);
+    store_reg(s, a->rda, rda);
+    tcg_temp_free_ptr(qm);
+    tcg_temp_free_ptr(qn);
+    mve_update_eci(s);
+    return true;
+}
+
+#define DO_VABAV(INSN, FN)                                      \
+    static bool trans_##INSN(DisasContext *s, arg_vabav *a)     \
+    {                                                           \
+        static MVEGenVABAVFn * const fns[] = {                  \
+            gen_helper_mve_##FN##b,                             \
+            gen_helper_mve_##FN##h,                             \
+            gen_helper_mve_##FN##w,                             \
+            NULL,                                               \
+        };                                                      \
+        return do_vabav(s, a, fns[a->size]);                    \
+    }
+
+DO_VABAV(VABAV_S, vabavs)
+DO_VABAV(VABAV_U, vabavu)
-- 
2.20.1

[PULL 23/44] target/arm: Implement MVE narrowing moves

[Peter Maydell]

Implement the MVE narrowing move insns VMOVN, VQMOVN and VQMOVUN.
These take a double-width input, narrow it (possibly saturating) and
store the result to either the top or bottom half of the output
element.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    | 20 ++++++++++
 target/arm/mve.decode      | 12 ++++++
 target/arm/mve_helper.c    | 78 ++++++++++++++++++++++++++++++++++++++
 target/arm/translate-mve.c | 22 +++++++++++
 4 files changed, 132 insertions(+)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index c7e7aab2cbb..17484f74323 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -76,6 +76,26 @@ DEF_HELPER_FLAGS_3(mve_vnegw, TCG_CALL_NO_WG, void, env, ptr, ptr)
 DEF_HELPER_FLAGS_3(mve_vfnegh, TCG_CALL_NO_WG, void, env, ptr, ptr)
 DEF_HELPER_FLAGS_3(mve_vfnegs, TCG_CALL_NO_WG, void, env, ptr, ptr)
 
+DEF_HELPER_FLAGS_3(mve_vmovnbb, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vmovnbh, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vmovntb, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vmovnth, TCG_CALL_NO_WG, void, env, ptr, ptr)
+
+DEF_HELPER_FLAGS_3(mve_vqmovunbb, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vqmovunbh, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vqmovuntb, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vqmovunth, TCG_CALL_NO_WG, void, env, ptr, ptr)
+
+DEF_HELPER_FLAGS_3(mve_vqmovnbsb, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vqmovnbsh, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vqmovntsb, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vqmovntsh, TCG_CALL_NO_WG, void, env, ptr, ptr)
+
+DEF_HELPER_FLAGS_3(mve_vqmovnbub, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vqmovnbuh, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vqmovntub, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vqmovntuh, TCG_CALL_NO_WG, void, env, ptr, ptr)
+
 DEF_HELPER_FLAGS_4(mve_vand, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 DEF_HELPER_FLAGS_4(mve_vbic, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 DEF_HELPER_FLAGS_4(mve_vorr, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index c8a06edca78..d295a693b18 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -153,6 +153,9 @@ VMUL             1110 1111 0 . .. ... 0 ... 0 1001 . 1 . 1 ... 0 @2op
   VSHLL_BS       111 0 1110 0 . 11 .. 01 ... 0 1110 0 0 . 0 ... 1 @2_shll_esize_b
   VSHLL_BS       111 0 1110 0 . 11 .. 01 ... 0 1110 0 0 . 0 ... 1 @2_shll_esize_h
 
+  VQMOVUNB       111 0 1110 0 . 11 .. 01 ... 0 1110 1 0 . 0 ... 1 @1op
+  VQMOVN_BS      111 0 1110 0 . 11 .. 11 ... 0 1110 0 0 . 0 ... 1 @1op
+
   VMULH_S        111 0 1110 0 . .. ...1 ... 0 1110 . 0 . 0 ... 1 @2op
 }
 
@@ -160,6 +163,9 @@ VMUL             1110 1111 0 . .. ... 0 ... 0 1001 . 1 . 1 ... 0 @2op
   VSHLL_BU       111 1 1110 0 . 11 .. 01 ... 0 1110 0 0 . 0 ... 1 @2_shll_esize_b
   VSHLL_BU       111 1 1110 0 . 11 .. 01 ... 0 1110 0 0 . 0 ... 1 @2_shll_esize_h
 
+  VMOVNB         111 1 1110 0 . 11 .. 01 ... 0 1110 1 0 . 0 ... 1 @1op
+  VQMOVN_BU      111 1 1110 0 . 11 .. 11 ... 0 1110 0 0 . 0 ... 1 @1op
+
   VMULH_U        111 1 1110 0 . .. ...1 ... 0 1110 . 0 . 0 ... 1 @2op
 }
 
@@ -167,6 +173,9 @@ VMUL             1110 1111 0 . .. ... 0 ... 0 1001 . 1 . 1 ... 0 @2op
   VSHLL_TS       111 0 1110 0 . 11 .. 01 ... 1 1110 0 0 . 0 ... 1 @2_shll_esize_b
   VSHLL_TS       111 0 1110 0 . 11 .. 01 ... 1 1110 0 0 . 0 ... 1 @2_shll_esize_h
 
+  VQMOVUNT       111 0 1110 0 . 11 .. 01 ... 1 1110 1 0 . 0 ... 1 @1op
+  VQMOVN_TS      111 0 1110 0 . 11 .. 11 ... 1 1110 0 0 . 0 ... 1 @1op
+
   VRMULH_S       111 0 1110 0 . .. ...1 ... 1 1110 . 0 . 0 ... 1 @2op
 }
 
@@ -174,6 +183,9 @@ VMUL             1110 1111 0 . .. ... 0 ... 0 1001 . 1 . 1 ... 0 @2op
   VSHLL_TU       111 1 1110 0 . 11 .. 01 ... 1 1110 0 0 . 0 ... 1 @2_shll_esize_b
   VSHLL_TU       111 1 1110 0 . 11 .. 01 ... 1 1110 0 0 . 0 ... 1 @2_shll_esize_h
 
+  VMOVNT         111 1 1110 0 . 11 .. 01 ... 1 1110 1 0 . 0 ... 1 @1op
+  VQMOVN_TU      111 1 1110 0 . 11 .. 11 ... 1 1110 0 0 . 0 ... 1 @1op
+
   VRMULH_U       111 1 1110 0 . .. ...1 ... 1 1110 . 0 . 0 ... 1 @2op
 }
 
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index fed0f3cd610..72c30f360ac 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -1650,6 +1650,84 @@ DO_VSHRN_SAT_UH(vqrshrnb_uh, vqrshrnt_uh, DO_RSHRN_UH)
 DO_VSHRN_SAT_SB(vqrshrunbb, vqrshruntb, DO_RSHRUN_B)
 DO_VSHRN_SAT_SH(vqrshrunbh, vqrshrunth, DO_RSHRUN_H)
 
+#define DO_VMOVN(OP, TOP, ESIZE, TYPE, LESIZE, LTYPE)                   \
+    void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm)         \
+    {                                                                   \
+        LTYPE *m = vm;                                                  \
+        TYPE *d = vd;                                                   \
+        uint16_t mask = mve_element_mask(env);                          \
+        unsigned le;                                                    \
+        mask >>= ESIZE * TOP;                                           \
+        for (le = 0; le < 16 / LESIZE; le++, mask >>= LESIZE) {         \
+            mergemask(&d[H##ESIZE(le * 2 + TOP)],                       \
+                      m[H##LESIZE(le)], mask);                          \
+        }                                                               \
+        mve_advance_vpt(env);                                           \
+    }
+
+DO_VMOVN(vmovnbb, false, 1, uint8_t, 2, uint16_t)
+DO_VMOVN(vmovnbh, false, 2, uint16_t, 4, uint32_t)
+DO_VMOVN(vmovntb, true, 1, uint8_t, 2, uint16_t)
+DO_VMOVN(vmovnth, true, 2, uint16_t, 4, uint32_t)
+
+#define DO_VMOVN_SAT(OP, TOP, ESIZE, TYPE, LESIZE, LTYPE, FN)           \
+    void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm)         \
+    {                                                                   \
+        LTYPE *m = vm;                                                  \
+        TYPE *d = vd;                                                   \
+        uint16_t mask = mve_element_mask(env);                          \
+        bool qc = false;                                                \
+        unsigned le;                                                    \
+        mask >>= ESIZE * TOP;                                           \
+        for (le = 0; le < 16 / LESIZE; le++, mask >>= LESIZE) {         \
+            bool sat = false;                                           \
+            TYPE r = FN(m[H##LESIZE(le)], &sat);                        \
+            mergemask(&d[H##ESIZE(le * 2 + TOP)], r, mask);             \
+            qc |= sat & mask & 1;                                       \
+        }                                                               \
+        if (qc) {                                                       \
+            env->vfp.qc[0] = qc;                                        \
+        }                                                               \
+        mve_advance_vpt(env);                                           \
+    }
+
+#define DO_VMOVN_SAT_UB(BOP, TOP, FN)                           \
+    DO_VMOVN_SAT(BOP, false, 1, uint8_t, 2, uint16_t, FN)       \
+    DO_VMOVN_SAT(TOP, true, 1, uint8_t, 2, uint16_t, FN)
+
+#define DO_VMOVN_SAT_UH(BOP, TOP, FN)                           \
+    DO_VMOVN_SAT(BOP, false, 2, uint16_t, 4, uint32_t, FN)      \
+    DO_VMOVN_SAT(TOP, true, 2, uint16_t, 4, uint32_t, FN)
+
+#define DO_VMOVN_SAT_SB(BOP, TOP, FN)                           \
+    DO_VMOVN_SAT(BOP, false, 1, int8_t, 2, int16_t, FN)         \
+    DO_VMOVN_SAT(TOP, true, 1, int8_t, 2, int16_t, FN)
+
+#define DO_VMOVN_SAT_SH(BOP, TOP, FN)                           \
+    DO_VMOVN_SAT(BOP, false, 2, int16_t, 4, int32_t, FN)        \
+    DO_VMOVN_SAT(TOP, true, 2, int16_t, 4, int32_t, FN)
+
+#define DO_VQMOVN_SB(N, SATP)                           \
+    do_sat_bhs((int64_t)(N), INT8_MIN, INT8_MAX, SATP)
+#define DO_VQMOVN_UB(N, SATP)                           \
+    do_sat_bhs((uint64_t)(N), 0, UINT8_MAX, SATP)
+#define DO_VQMOVUN_B(N, SATP)                           \
+    do_sat_bhs((int64_t)(N), 0, UINT8_MAX, SATP)
+
+#define DO_VQMOVN_SH(N, SATP)                           \
+    do_sat_bhs((int64_t)(N), INT16_MIN, INT16_MAX, SATP)
+#define DO_VQMOVN_UH(N, SATP)                           \
+    do_sat_bhs((uint64_t)(N), 0, UINT16_MAX, SATP)
+#define DO_VQMOVUN_H(N, SATP)                           \
+    do_sat_bhs((int64_t)(N), 0, UINT16_MAX, SATP)
+
+DO_VMOVN_SAT_SB(vqmovnbsb, vqmovntsb, DO_VQMOVN_SB)
+DO_VMOVN_SAT_SH(vqmovnbsh, vqmovntsh, DO_VQMOVN_SH)
+DO_VMOVN_SAT_UB(vqmovnbub, vqmovntub, DO_VQMOVN_UB)
+DO_VMOVN_SAT_UH(vqmovnbuh, vqmovntuh, DO_VQMOVN_UH)
+DO_VMOVN_SAT_SB(vqmovunbb, vqmovuntb, DO_VQMOVUN_B)
+DO_VMOVN_SAT_SH(vqmovunbh, vqmovunth, DO_VQMOVUN_H)
+
 uint32_t HELPER(mve_vshlc)(CPUARMState *env, void *vd, uint32_t rdm,
                            uint32_t shift)
 {
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index 247f6719e6f..5c3655efc3c 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -275,6 +275,28 @@ DO_1OP(VCLS, vcls)
 DO_1OP(VABS, vabs)
 DO_1OP(VNEG, vneg)
 
+/* Narrowing moves: only size 0 and 1 are valid */
+#define DO_VMOVN(INSN, FN) \
+    static bool trans_##INSN(DisasContext *s, arg_1op *a)       \
+    {                                                           \
+        static MVEGenOneOpFn * const fns[] = {                  \
+            gen_helper_mve_##FN##b,                             \
+            gen_helper_mve_##FN##h,                             \
+            NULL,                                               \
+            NULL,                                               \
+        };                                                      \
+        return do_1op(s, a, fns[a->size]);                      \
+    }
+
+DO_VMOVN(VMOVNB, vmovnb)
+DO_VMOVN(VMOVNT, vmovnt)
+DO_VMOVN(VQMOVUNB, vqmovunb)
+DO_VMOVN(VQMOVUNT, vqmovunt)
+DO_VMOVN(VQMOVN_BS, vqmovnbs)
+DO_VMOVN(VQMOVN_TS, vqmovnts)
+DO_VMOVN(VQMOVN_BU, vqmovnbu)
+DO_VMOVN(VQMOVN_TU, vqmovntu)
+
 static bool trans_VREV16(DisasContext *s, arg_1op *a)
 {
     static MVEGenOneOpFn * const fns[] = {
-- 
2.20.1

[PULL 24/44] target/arm: Rename MVEGenDualAccOpFn to MVEGenLongDualAccOpFn

[Peter Maydell]

The MVEGenDualAccOpFn is a bit misnamed, since it is used for
the "long dual accumulate" operations that use a 64-bit
accumulator. Rename it to MVEGenLongDualAccOpFn so we can
use the former name for the 32-bit accumulator insns.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/translate-mve.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index 5c3655efc3c..676411e05cb 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -38,7 +38,7 @@ typedef void MVEGenOneOpFn(TCGv_ptr, TCGv_ptr, TCGv_ptr);
 typedef void MVEGenTwoOpFn(TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_ptr);
 typedef void MVEGenTwoOpScalarFn(TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_i32);
 typedef void MVEGenTwoOpShiftFn(TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_i32);
-typedef void MVEGenDualAccOpFn(TCGv_i64, TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_i64);
+typedef void MVEGenLongDualAccOpFn(TCGv_i64, TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_i64);
 typedef void MVEGenVADDVFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_i32);
 typedef void MVEGenOneOpImmFn(TCGv_ptr, TCGv_ptr, TCGv_i64);
 typedef void MVEGenVIDUPFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_i32, TCGv_i32);
@@ -652,7 +652,7 @@ static bool trans_VQDMULLT_scalar(DisasContext *s, arg_2scalar *a)
 }
 
 static bool do_long_dual_acc(DisasContext *s, arg_vmlaldav *a,
-                             MVEGenDualAccOpFn *fn)
+                             MVEGenLongDualAccOpFn *fn)
 {
     TCGv_ptr qn, qm;
     TCGv_i64 rda;
@@ -710,7 +710,7 @@ static bool do_long_dual_acc(DisasContext *s, arg_vmlaldav *a,
 
 static bool trans_VMLALDAV_S(DisasContext *s, arg_vmlaldav *a)
 {
-    static MVEGenDualAccOpFn * const fns[4][2] = {
+    static MVEGenLongDualAccOpFn * const fns[4][2] = {
         { NULL, NULL },
         { gen_helper_mve_vmlaldavsh, gen_helper_mve_vmlaldavxsh },
         { gen_helper_mve_vmlaldavsw, gen_helper_mve_vmlaldavxsw },
@@ -721,7 +721,7 @@ static bool trans_VMLALDAV_S(DisasContext *s, arg_vmlaldav *a)
 
 static bool trans_VMLALDAV_U(DisasContext *s, arg_vmlaldav *a)
 {
-    static MVEGenDualAccOpFn * const fns[4][2] = {
+    static MVEGenLongDualAccOpFn * const fns[4][2] = {
         { NULL, NULL },
         { gen_helper_mve_vmlaldavuh, NULL },
         { gen_helper_mve_vmlaldavuw, NULL },
@@ -732,7 +732,7 @@ static bool trans_VMLALDAV_U(DisasContext *s, arg_vmlaldav *a)
 
 static bool trans_VMLSLDAV(DisasContext *s, arg_vmlaldav *a)
 {
-    static MVEGenDualAccOpFn * const fns[4][2] = {
+    static MVEGenLongDualAccOpFn * const fns[4][2] = {
         { NULL, NULL },
         { gen_helper_mve_vmlsldavsh, gen_helper_mve_vmlsldavxsh },
         { gen_helper_mve_vmlsldavsw, gen_helper_mve_vmlsldavxsw },
@@ -743,7 +743,7 @@ static bool trans_VMLSLDAV(DisasContext *s, arg_vmlaldav *a)
 
 static bool trans_VRMLALDAVH_S(DisasContext *s, arg_vmlaldav *a)
 {
-    static MVEGenDualAccOpFn * const fns[] = {
+    static MVEGenLongDualAccOpFn * const fns[] = {
         gen_helper_mve_vrmlaldavhsw, gen_helper_mve_vrmlaldavhxsw,
     };
     return do_long_dual_acc(s, a, fns[a->x]);
@@ -751,7 +751,7 @@ static bool trans_VRMLALDAVH_S(DisasContext *s, arg_vmlaldav *a)
 
 static bool trans_VRMLALDAVH_U(DisasContext *s, arg_vmlaldav *a)
 {
-    static MVEGenDualAccOpFn * const fns[] = {
+    static MVEGenLongDualAccOpFn * const fns[] = {
         gen_helper_mve_vrmlaldavhuw, NULL,
     };
     return do_long_dual_acc(s, a, fns[a->x]);
@@ -759,7 +759,7 @@ static bool trans_VRMLALDAVH_U(DisasContext *s, arg_vmlaldav *a)
 
 static bool trans_VRMLSLDAVH(DisasContext *s, arg_vmlaldav *a)
 {
-    static MVEGenDualAccOpFn * const fns[] = {
+    static MVEGenLongDualAccOpFn * const fns[] = {
         gen_helper_mve_vrmlsldavhsw, gen_helper_mve_vrmlsldavhxsw,
     };
     return do_long_dual_acc(s, a, fns[a->x]);
-- 
2.20.1

[PULL 25/44] target/arm: Implement MVE VMLADAV and VMLSLDAV

[Peter Maydell]

Implement the MVE VMLADAV and VMLSLDAV insns.  Like the VMLALDAV and
VMLSLDAV insns already implemented, these accumulate multiplied
vector elements; but they accumulate a 32-bit result rather than a
64-bit one.

Note that these encodings overlap with what would be RdaHi=0b111 for
VMLALDAV, VMLSLDAV, VRMLALDAVH and VRMLSLDAVH.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    | 17 ++++++++++
 target/arm/mve.decode      | 33 +++++++++++++++++---
 target/arm/mve_helper.c    | 41 ++++++++++++++++++++++++
 target/arm/translate-mve.c | 64 ++++++++++++++++++++++++++++++++++++++
 4 files changed, 150 insertions(+), 5 deletions(-)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index 17484f74323..34d644a519c 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -392,6 +392,23 @@ DEF_HELPER_FLAGS_4(mve_vrmlaldavhuw, TCG_CALL_NO_WG, i64, env, ptr, ptr, i64)
 DEF_HELPER_FLAGS_4(mve_vrmlsldavhsw, TCG_CALL_NO_WG, i64, env, ptr, ptr, i64)
 DEF_HELPER_FLAGS_4(mve_vrmlsldavhxsw, TCG_CALL_NO_WG, i64, env, ptr, ptr, i64)
 
+DEF_HELPER_FLAGS_4(mve_vmladavsb, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmladavsh, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmladavsw, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmladavub, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmladavuh, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmladavuw, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmlsdavb, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmlsdavh, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmlsdavw, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_4(mve_vmladavsxb, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmladavsxh, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmladavsxw, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmlsdavxb, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmlsdavxh, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmlsdavxw, TCG_CALL_NO_WG, i32, env, ptr, ptr, i32)
+
 DEF_HELPER_FLAGS_3(mve_vaddvsb, TCG_CALL_NO_WG, i32, env, ptr, i32)
 DEF_HELPER_FLAGS_3(mve_vaddvub, TCG_CALL_NO_WG, i32, env, ptr, i32)
 DEF_HELPER_FLAGS_3(mve_vaddvsh, TCG_CALL_NO_WG, i32, env, ptr, i32)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index d295a693b18..cec5a51b0ee 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -320,32 +320,55 @@ VDUP             1110 1110 1 0 10 ... 0 .... 1011 . 0 0 1 0000 @vdup size=2
 %size_16 16:1 !function=plus_1
 
 &vmlaldav rdahi rdalo size qn qm x a
+&vmladav rda size qn qm x a
 
 @vmlaldav        .... .... . ... ... . ... x:1 .... .. a:1 . qm:3 . \
                  qn=%qn rdahi=%rdahi rdalo=%rdalo size=%size_16 &vmlaldav
 @vmlaldav_nosz   .... .... . ... ... . ... x:1 .... .. a:1 . qm:3 . \
                  qn=%qn rdahi=%rdahi rdalo=%rdalo size=0 &vmlaldav
-VMLALDAV_S       1110 1110 1 ... ... . ... . 1110 . 0 . 0 ... 0 @vmlaldav
-VMLALDAV_U       1111 1110 1 ... ... . ... . 1110 . 0 . 0 ... 0 @vmlaldav
+@vmladav         .... .... .... ... . ... x:1 .... . . a:1 . qm:3 . \
+                 qn=%qn rda=%rdalo size=%size_16 &vmladav
+@vmladav_nosz    .... .... .... ... . ... x:1 .... . . a:1 . qm:3 . \
+                 qn=%qn rda=%rdalo size=0 &vmladav
 
-VMLSLDAV         1110 1110 1 ... ... . ... . 1110 . 0 . 0 ... 1 @vmlaldav
+{
+  VMLADAV_S      1110 1110 1111  ... . ... . 1110 . 0 . 0 ... 0 @vmladav
+  VMLALDAV_S     1110 1110 1 ... ... . ... . 1110 . 0 . 0 ... 0 @vmlaldav
+}
+{
+  VMLADAV_U      1111 1110 1111  ... . ... . 1110 . 0 . 0 ... 0 @vmladav
+  VMLALDAV_U     1111 1110 1 ... ... . ... . 1110 . 0 . 0 ... 0 @vmlaldav
+}
+
+{
+  VMLSDAV        1110 1110 1111  ... . ... . 1110 . 0 . 0 ... 1 @vmladav
+  VMLSLDAV       1110 1110 1 ... ... . ... . 1110 . 0 . 0 ... 1 @vmlaldav
+}
+
+{
+  VMLSDAV        1111 1110 1111  ... 0 ... . 1110 . 0 . 0 ... 1 @vmladav_nosz
+  VRMLSLDAVH     1111 1110 1 ... ... 0 ... . 1110 . 0 . 0 ... 1 @vmlaldav_nosz
+}
+
+VMLADAV_S        1110 1110 1111  ... 0 ... . 1111 . 0 . 0 ... 1 @vmladav_nosz
+VMLADAV_U        1111 1110 1111  ... 0 ... . 1111 . 0 . 0 ... 1 @vmladav_nosz
 
 {
   VMAXV_S        1110 1110 1110  .. 10 ....  1111 0 0 . 0 ... 0 @vmaxv
   VMINV_S        1110 1110 1110  .. 10 ....  1111 1 0 . 0 ... 0 @vmaxv
   VMAXAV         1110 1110 1110  .. 00 ....  1111 0 0 . 0 ... 0 @vmaxv
   VMINAV         1110 1110 1110  .. 00 ....  1111 1 0 . 0 ... 0 @vmaxv
+  VMLADAV_S      1110 1110 1111  ... 0 ... . 1111 . 0 . 0 ... 0 @vmladav_nosz
   VRMLALDAVH_S   1110 1110 1 ... ... 0 ... . 1111 . 0 . 0 ... 0 @vmlaldav_nosz
 }
 
 {
   VMAXV_U        1111 1110 1110  .. 10 ....  1111 0 0 . 0 ... 0 @vmaxv
   VMINV_U        1111 1110 1110  .. 10 ....  1111 1 0 . 0 ... 0 @vmaxv
+  VMLADAV_U      1111 1110 1111  ... 0 ... . 1111 . 0 . 0 ... 0 @vmladav_nosz
   VRMLALDAVH_U   1111 1110 1 ... ... 0 ... . 1111 . 0 . 0 ... 0 @vmlaldav_nosz
 }
 
-VRMLSLDAVH       1111 1110 1 ... ... 0 ... . 1110 . 0 . 0 ... 1 @vmlaldav_nosz
-
 # Scalar operations
 
 VADD_scalar      1110 1110 0 . .. ... 1 ... 0 1111 . 100 .... @2scalar
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index 72c30f360ac..ea206c932bc 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -1189,6 +1189,47 @@ DO_LDAV(vmlsldavxsh, 2, int16_t, true, +=, -=)
 DO_LDAV(vmlsldavsw, 4, int32_t, false, +=, -=)
 DO_LDAV(vmlsldavxsw, 4, int32_t, true, +=, -=)
 
+/*
+ * Multiply add dual accumulate ops
+ */
+#define DO_DAV(OP, ESIZE, TYPE, XCHG, EVENACC, ODDACC) \
+    uint32_t HELPER(glue(mve_, OP))(CPUARMState *env, void *vn,         \
+                                    void *vm, uint32_t a)               \
+    {                                                                   \
+        uint16_t mask = mve_element_mask(env);                          \
+        unsigned e;                                                     \
+        TYPE *n = vn, *m = vm;                                          \
+        for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) {              \
+            if (mask & 1) {                                             \
+                if (e & 1) {                                            \
+                    a ODDACC                                            \
+                        n[H##ESIZE(e - 1 * XCHG)] * m[H##ESIZE(e)];     \
+                } else {                                                \
+                    a EVENACC                                           \
+                        n[H##ESIZE(e + 1 * XCHG)] * m[H##ESIZE(e)];     \
+                }                                                       \
+            }                                                           \
+        }                                                               \
+        mve_advance_vpt(env);                                           \
+        return a;                                                       \
+    }
+
+#define DO_DAV_S(INSN, XCHG, EVENACC, ODDACC)           \
+    DO_DAV(INSN##b, 1, int8_t, XCHG, EVENACC, ODDACC)   \
+    DO_DAV(INSN##h, 2, int16_t, XCHG, EVENACC, ODDACC)  \
+    DO_DAV(INSN##w, 4, int32_t, XCHG, EVENACC, ODDACC)
+
+#define DO_DAV_U(INSN, XCHG, EVENACC, ODDACC)           \
+    DO_DAV(INSN##b, 1, uint8_t, XCHG, EVENACC, ODDACC)  \
+    DO_DAV(INSN##h, 2, uint16_t, XCHG, EVENACC, ODDACC) \
+    DO_DAV(INSN##w, 4, uint32_t, XCHG, EVENACC, ODDACC)
+
+DO_DAV_S(vmladavs, false, +=, +=)
+DO_DAV_U(vmladavu, false, +=, +=)
+DO_DAV_S(vmlsdav, false, +=, -=)
+DO_DAV_S(vmladavsx, true, +=, +=)
+DO_DAV_S(vmlsdavx, true, +=, -=)
+
 /*
  * Rounding multiply add long dual accumulate high. In the pseudocode
  * this is implemented with a 72-bit internal accumulator value of which
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index 676411e05cb..92ed1be83e7 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -46,6 +46,7 @@ typedef void MVEGenVIWDUPFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_i32, TCGv_i32, TC
 typedef void MVEGenCmpFn(TCGv_ptr, TCGv_ptr, TCGv_ptr);
 typedef void MVEGenScalarCmpFn(TCGv_ptr, TCGv_ptr, TCGv_i32);
 typedef void MVEGenVABAVFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_i32);
+typedef void MVEGenDualAccOpFn(TCGv_i32, TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_i32);
 
 /* Return the offset of a Qn register (same semantics as aa32_vfp_qreg()) */
 static inline long mve_qreg_offset(unsigned reg)
@@ -765,6 +766,69 @@ static bool trans_VRMLSLDAVH(DisasContext *s, arg_vmlaldav *a)
     return do_long_dual_acc(s, a, fns[a->x]);
 }
 
+static bool do_dual_acc(DisasContext *s, arg_vmladav *a, MVEGenDualAccOpFn *fn)
+{
+    TCGv_ptr qn, qm;
+    TCGv_i32 rda;
+
+    if (!dc_isar_feature(aa32_mve, s) ||
+        !mve_check_qreg_bank(s, a->qn) ||
+        !fn) {
+        return false;
+    }
+    if (!mve_eci_check(s) || !vfp_access_check(s)) {
+        return true;
+    }
+
+    qn = mve_qreg_ptr(a->qn);
+    qm = mve_qreg_ptr(a->qm);
+
+    /*
+     * This insn is subject to beat-wise execution. Partial execution
+     * of an A=0 (no-accumulate) insn which does not execute the first
+     * beat must start with the current rda value, not 0.
+     */
+    if (a->a || mve_skip_first_beat(s)) {
+        rda = load_reg(s, a->rda);
+    } else {
+        rda = tcg_const_i32(0);
+    }
+
+    fn(rda, cpu_env, qn, qm, rda);
+    store_reg(s, a->rda, rda);
+    tcg_temp_free_ptr(qn);
+    tcg_temp_free_ptr(qm);
+
+    mve_update_eci(s);
+    return true;
+}
+
+#define DO_DUAL_ACC(INSN, FN)                                           \
+    static bool trans_##INSN(DisasContext *s, arg_vmladav *a)           \
+    {                                                                   \
+        static MVEGenDualAccOpFn * const fns[4][2] = {                  \
+            { gen_helper_mve_##FN##b, gen_helper_mve_##FN##xb },        \
+            { gen_helper_mve_##FN##h, gen_helper_mve_##FN##xh },        \
+            { gen_helper_mve_##FN##w, gen_helper_mve_##FN##xw },        \
+            { NULL, NULL },                                             \
+        };                                                              \
+        return do_dual_acc(s, a, fns[a->size][a->x]);                   \
+    }
+
+DO_DUAL_ACC(VMLADAV_S, vmladavs)
+DO_DUAL_ACC(VMLSDAV, vmlsdav)
+
+static bool trans_VMLADAV_U(DisasContext *s, arg_vmladav *a)
+{
+    static MVEGenDualAccOpFn * const fns[4][2] = {
+        { gen_helper_mve_vmladavub, NULL },
+        { gen_helper_mve_vmladavuh, NULL },
+        { gen_helper_mve_vmladavuw, NULL },
+        { NULL, NULL },
+    };
+    return do_dual_acc(s, a, fns[a->size][a->x]);
+}
+
 static void gen_vpst(DisasContext *s, uint32_t mask)
 {
     /*
-- 
2.20.1

[PULL 26/44] target/arm: Implement MVE VMLA

[Peter Maydell]

Implement the MVE VMLA insn, which multiplies a vector by a scalar
and accumulates into another vector.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    | 4 ++++
 target/arm/mve.decode      | 1 +
 target/arm/mve_helper.c    | 5 +++++
 target/arm/translate-mve.c | 1 +
 4 files changed, 11 insertions(+)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index 34d644a519c..328e31e2665 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -367,6 +367,10 @@ DEF_HELPER_FLAGS_4(mve_vqdmullb_scalarw, TCG_CALL_NO_WG, void, env, ptr, ptr, i3
 DEF_HELPER_FLAGS_4(mve_vqdmullt_scalarh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(mve_vqdmullt_scalarw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 
+DEF_HELPER_FLAGS_4(mve_vmlab, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmlah, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vmlaw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+
 DEF_HELPER_FLAGS_4(mve_vmlasb, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(mve_vmlash, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(mve_vmlasw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index cec5a51b0ee..cd9c806a11c 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -413,6 +413,7 @@ VQDMULH_scalar   1110 1110 0 . .. ... 1 ... 0 1110 . 110 .... @2scalar
 VQRDMULH_scalar  1111 1110 0 . .. ... 1 ... 0 1110 . 110 .... @2scalar
 
 # The U bit (28) is don't-care because it does not affect the result
+VMLA             111- 1110 0 . .. ... 1 ... 0 1110 . 100 .... @2scalar
 VMLAS            111- 1110 0 . .. ... 1 ... 1 1110 . 100 .... @2scalar
 
 # Vector add across vector
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index ea206c932bc..8004b9bb728 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -1008,6 +1008,11 @@ DO_2OP_SAT_SCALAR(vqrdmulh_scalarb, 1, int8_t, DO_QRDMULH_B)
 DO_2OP_SAT_SCALAR(vqrdmulh_scalarh, 2, int16_t, DO_QRDMULH_H)
 DO_2OP_SAT_SCALAR(vqrdmulh_scalarw, 4, int32_t, DO_QRDMULH_W)
 
+/* Vector by scalar plus vector */
+#define DO_VMLA(D, N, M) ((N) * (M) + (D))
+
+DO_2OP_ACC_SCALAR_U(vmla, DO_VMLA)
+
 /* Vector by vector plus scalar */
 #define DO_VMLAS(D, N, M) ((N) * (D) + (M))
 
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index 92ed1be83e7..f8899af352d 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -620,6 +620,7 @@ DO_2OP_SCALAR(VQSUB_U_scalar, vqsubu_scalar)
 DO_2OP_SCALAR(VQDMULH_scalar, vqdmulh_scalar)
 DO_2OP_SCALAR(VQRDMULH_scalar, vqrdmulh_scalar)
 DO_2OP_SCALAR(VBRSR, vbrsr)
+DO_2OP_SCALAR(VMLA, vmla)
 DO_2OP_SCALAR(VMLAS, vmlas)
 
 static bool trans_VQDMULLB_scalar(DisasContext *s, arg_2scalar *a)
-- 
2.20.1

[PULL 27/44] target/arm: Implement MVE saturating doubling multiply accumulates

[Peter Maydell]

Implement the MVE saturating doubling multiply accumulate insns
VQDMLAH, VQRDMLAH, VQDMLASH and VQRDMLASH.  These perform a multiply,
double, add the accumulator shifted by the element size, possibly
round, saturate to twice the element size, then take the high half of
the result.  The *MLAH insns do vector * scalar + vector, and the
*MLASH insns do vector * vector + scalar.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    | 16 +++++++
 target/arm/mve.decode      |  5 ++
 target/arm/mve_helper.c    | 95 ++++++++++++++++++++++++++++++++++++++
 target/arm/translate-mve.c |  4 ++
 4 files changed, 120 insertions(+)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index 328e31e2665..2f54396b2df 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -375,6 +375,22 @@ DEF_HELPER_FLAGS_4(mve_vmlasb, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(mve_vmlash, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(mve_vmlasw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 
+DEF_HELPER_FLAGS_4(mve_vqdmlahb, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vqdmlahh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vqdmlahw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_4(mve_vqrdmlahb, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vqrdmlahh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vqrdmlahw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_4(mve_vqdmlashb, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vqdmlashh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vqdmlashw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_4(mve_vqrdmlashb, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vqrdmlashh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vqrdmlashw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+
 DEF_HELPER_FLAGS_4(mve_vmlaldavsh, TCG_CALL_NO_WG, i64, env, ptr, ptr, i64)
 DEF_HELPER_FLAGS_4(mve_vmlaldavsw, TCG_CALL_NO_WG, i64, env, ptr, ptr, i64)
 DEF_HELPER_FLAGS_4(mve_vmlaldavxsh, TCG_CALL_NO_WG, i64, env, ptr, ptr, i64)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index cd9c806a11c..7a6de3991b6 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -416,6 +416,11 @@ VQRDMULH_scalar  1111 1110 0 . .. ... 1 ... 0 1110 . 110 .... @2scalar
 VMLA             111- 1110 0 . .. ... 1 ... 0 1110 . 100 .... @2scalar
 VMLAS            111- 1110 0 . .. ... 1 ... 1 1110 . 100 .... @2scalar
 
+VQRDMLAH         1110 1110 0 . .. ... 0 ... 0 1110 . 100 .... @2scalar
+VQRDMLASH        1110 1110 0 . .. ... 0 ... 1 1110 . 100 .... @2scalar
+VQDMLAH          1110 1110 0 . .. ... 0 ... 0 1110 . 110 .... @2scalar
+VQDMLASH         1110 1110 0 . .. ... 0 ... 1 1110 . 110 .... @2scalar
+
 # Vector add across vector
 {
   VADDV          111 u:1 1110 1111 size:2 01 ... 0 1111 0 0 a:1 0 qm:3 0 rda=%rdalo
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index 8004b9bb728..a69fcd2243c 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -964,6 +964,28 @@ DO_VQDMLADH_OP(vqrdmlsdhxw, 4, int32_t, 1, 1, do_vqdmlsdh_w)
         mve_advance_vpt(env);                                           \
     }
 
+#define DO_2OP_SAT_ACC_SCALAR(OP, ESIZE, TYPE, FN)                      \
+    void HELPER(glue(mve_, OP))(CPUARMState *env, void *vd, void *vn,   \
+                                uint32_t rm)                            \
+    {                                                                   \
+        TYPE *d = vd, *n = vn;                                          \
+        TYPE m = rm;                                                    \
+        uint16_t mask = mve_element_mask(env);                          \
+        unsigned e;                                                     \
+        bool qc = false;                                                \
+        for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) {              \
+            bool sat = false;                                           \
+            mergemask(&d[H##ESIZE(e)],                                  \
+                      FN(d[H##ESIZE(e)], n[H##ESIZE(e)], m, &sat),      \
+                      mask);                                            \
+            qc |= sat & mask & 1;                                       \
+        }                                                               \
+        if (qc) {                                                       \
+            env->vfp.qc[0] = qc;                                        \
+        }                                                               \
+        mve_advance_vpt(env);                                           \
+    }
+
 /* provide unsigned 2-op scalar helpers for all sizes */
 #define DO_2OP_SCALAR_U(OP, FN)                 \
     DO_2OP_SCALAR(OP##b, 1, uint8_t, FN)        \
@@ -1008,6 +1030,79 @@ DO_2OP_SAT_SCALAR(vqrdmulh_scalarb, 1, int8_t, DO_QRDMULH_B)
 DO_2OP_SAT_SCALAR(vqrdmulh_scalarh, 2, int16_t, DO_QRDMULH_H)
 DO_2OP_SAT_SCALAR(vqrdmulh_scalarw, 4, int32_t, DO_QRDMULH_W)
 
+static int8_t do_vqdmlah_b(int8_t a, int8_t b, int8_t c, int round, bool *sat)
+{
+    int64_t r = (int64_t)a * b * 2 + ((int64_t)c << 8) + (round << 7);
+    return do_sat_bhw(r, INT16_MIN, INT16_MAX, sat) >> 8;
+}
+
+static int16_t do_vqdmlah_h(int16_t a, int16_t b, int16_t c,
+                           int round, bool *sat)
+{
+    int64_t r = (int64_t)a * b * 2 + ((int64_t)c << 16) + (round << 15);
+    return do_sat_bhw(r, INT32_MIN, INT32_MAX, sat) >> 16;
+}
+
+static int32_t do_vqdmlah_w(int32_t a, int32_t b, int32_t c,
+                            int round, bool *sat)
+{
+    /*
+     * Architecturally we should do the entire add, double, round
+     * and then check for saturation. We do three saturating adds,
+     * but we need to be careful about the order. If the first
+     * m1 + m2 saturates then it's impossible for the *2+rc to
+     * bring it back into the non-saturated range. However, if
+     * m1 + m2 is negative then it's possible that doing the doubling
+     * would take the intermediate result below INT64_MAX and the
+     * addition of the rounding constant then brings it back in range.
+     * So we add half the rounding constant and half the "c << esize"
+     * before doubling rather than adding the rounding constant after
+     * the doubling.
+     */
+    int64_t m1 = (int64_t)a * b;
+    int64_t m2 = (int64_t)c << 31;
+    int64_t r;
+    if (sadd64_overflow(m1, m2, &r) ||
+        sadd64_overflow(r, (round << 30), &r) ||
+        sadd64_overflow(r, r, &r)) {
+        *sat = true;
+        return r < 0 ? INT32_MAX : INT32_MIN;
+    }
+    return r >> 32;
+}
+
+/*
+ * The *MLAH insns are vector * scalar + vector;
+ * the *MLASH insns are vector * vector + scalar
+ */
+#define DO_VQDMLAH_B(D, N, M, S) do_vqdmlah_b(N, M, D, 0, S)
+#define DO_VQDMLAH_H(D, N, M, S) do_vqdmlah_h(N, M, D, 0, S)
+#define DO_VQDMLAH_W(D, N, M, S) do_vqdmlah_w(N, M, D, 0, S)
+#define DO_VQRDMLAH_B(D, N, M, S) do_vqdmlah_b(N, M, D, 1, S)
+#define DO_VQRDMLAH_H(D, N, M, S) do_vqdmlah_h(N, M, D, 1, S)
+#define DO_VQRDMLAH_W(D, N, M, S) do_vqdmlah_w(N, M, D, 1, S)
+
+#define DO_VQDMLASH_B(D, N, M, S) do_vqdmlah_b(N, D, M, 0, S)
+#define DO_VQDMLASH_H(D, N, M, S) do_vqdmlah_h(N, D, M, 0, S)
+#define DO_VQDMLASH_W(D, N, M, S) do_vqdmlah_w(N, D, M, 0, S)
+#define DO_VQRDMLASH_B(D, N, M, S) do_vqdmlah_b(N, D, M, 1, S)
+#define DO_VQRDMLASH_H(D, N, M, S) do_vqdmlah_h(N, D, M, 1, S)
+#define DO_VQRDMLASH_W(D, N, M, S) do_vqdmlah_w(N, D, M, 1, S)
+
+DO_2OP_SAT_ACC_SCALAR(vqdmlahb, 1, int8_t, DO_VQDMLAH_B)
+DO_2OP_SAT_ACC_SCALAR(vqdmlahh, 2, int16_t, DO_VQDMLAH_H)
+DO_2OP_SAT_ACC_SCALAR(vqdmlahw, 4, int32_t, DO_VQDMLAH_W)
+DO_2OP_SAT_ACC_SCALAR(vqrdmlahb, 1, int8_t, DO_VQRDMLAH_B)
+DO_2OP_SAT_ACC_SCALAR(vqrdmlahh, 2, int16_t, DO_VQRDMLAH_H)
+DO_2OP_SAT_ACC_SCALAR(vqrdmlahw, 4, int32_t, DO_VQRDMLAH_W)
+
+DO_2OP_SAT_ACC_SCALAR(vqdmlashb, 1, int8_t, DO_VQDMLASH_B)
+DO_2OP_SAT_ACC_SCALAR(vqdmlashh, 2, int16_t, DO_VQDMLASH_H)
+DO_2OP_SAT_ACC_SCALAR(vqdmlashw, 4, int32_t, DO_VQDMLASH_W)
+DO_2OP_SAT_ACC_SCALAR(vqrdmlashb, 1, int8_t, DO_VQRDMLASH_B)
+DO_2OP_SAT_ACC_SCALAR(vqrdmlashh, 2, int16_t, DO_VQRDMLASH_H)
+DO_2OP_SAT_ACC_SCALAR(vqrdmlashw, 4, int32_t, DO_VQRDMLASH_W)
+
 /* Vector by scalar plus vector */
 #define DO_VMLA(D, N, M) ((N) * (M) + (D))
 
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index f8899af352d..e3e115c1aa9 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -622,6 +622,10 @@ DO_2OP_SCALAR(VQRDMULH_scalar, vqrdmulh_scalar)
 DO_2OP_SCALAR(VBRSR, vbrsr)
 DO_2OP_SCALAR(VMLA, vmla)
 DO_2OP_SCALAR(VMLAS, vmlas)
+DO_2OP_SCALAR(VQDMLAH, vqdmlah)
+DO_2OP_SCALAR(VQRDMLAH, vqrdmlah)
+DO_2OP_SCALAR(VQDMLASH, vqdmlash)
+DO_2OP_SCALAR(VQRDMLASH, vqrdmlash)
 
 static bool trans_VQDMULLB_scalar(DisasContext *s, arg_2scalar *a)
 {
-- 
2.20.1

[PULL 28/44] target/arm: Implement MVE VQABS, VQNEG

[Peter Maydell]

Implement the MVE 1-operand saturating operations VQABS and VQNEG.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    |  8 ++++++++
 target/arm/mve.decode      |  3 +++
 target/arm/mve_helper.c    | 37 +++++++++++++++++++++++++++++++++++++
 target/arm/translate-mve.c |  2 ++
 4 files changed, 50 insertions(+)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index 2f54396b2df..f9345bfafc7 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -76,6 +76,14 @@ DEF_HELPER_FLAGS_3(mve_vnegw, TCG_CALL_NO_WG, void, env, ptr, ptr)
 DEF_HELPER_FLAGS_3(mve_vfnegh, TCG_CALL_NO_WG, void, env, ptr, ptr)
 DEF_HELPER_FLAGS_3(mve_vfnegs, TCG_CALL_NO_WG, void, env, ptr, ptr)
 
+DEF_HELPER_FLAGS_3(mve_vqabsb, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vqabsh, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vqabsw, TCG_CALL_NO_WG, void, env, ptr, ptr)
+
+DEF_HELPER_FLAGS_3(mve_vqnegb, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vqnegh, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vqnegw, TCG_CALL_NO_WG, void, env, ptr, ptr)
+
 DEF_HELPER_FLAGS_3(mve_vmovnbb, TCG_CALL_NO_WG, void, env, ptr, ptr)
 DEF_HELPER_FLAGS_3(mve_vmovnbh, TCG_CALL_NO_WG, void, env, ptr, ptr)
 DEF_HELPER_FLAGS_3(mve_vmovntb, TCG_CALL_NO_WG, void, env, ptr, ptr)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index 7a6de3991b6..a05b882f9d9 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -279,6 +279,9 @@ VABS_fp          1111 1111 1 . 11 .. 01 ... 0 0111 01 . 0 ... 0 @1op
 VNEG             1111 1111 1 . 11 .. 01 ... 0 0011 11 . 0 ... 0 @1op
 VNEG_fp          1111 1111 1 . 11 .. 01 ... 0 0111 11 . 0 ... 0 @1op
 
+VQABS            1111 1111 1 . 11 .. 00 ... 0 0111 01 . 0 ... 0 @1op
+VQNEG            1111 1111 1 . 11 .. 00 ... 0 0111 11 . 0 ... 0 @1op
+
 &vdup qd rt size
 # Qd is in the fields usually named Qn
 @vdup            .... .... . . .. ... . rt:4 .... . . . . .... qd=%qn &vdup
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index a69fcd2243c..6539012ddd8 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -2200,3 +2200,40 @@ void HELPER(mve_vpsel)(CPUARMState *env, void *vd, void *vn, void *vm)
     }
     mve_advance_vpt(env);
 }
+
+#define DO_1OP_SAT(OP, ESIZE, TYPE, FN)                                 \
+    void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm)         \
+    {                                                                   \
+        TYPE *d = vd, *m = vm;                                          \
+        uint16_t mask = mve_element_mask(env);                          \
+        unsigned e;                                                     \
+        bool qc = false;                                                \
+        for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) {              \
+            bool sat = false;                                           \
+            mergemask(&d[H##ESIZE(e)], FN(m[H##ESIZE(e)], &sat), mask); \
+            qc |= sat & mask & 1;                                       \
+        }                                                               \
+        if (qc) {                                                       \
+            env->vfp.qc[0] = qc;                                        \
+        }                                                               \
+        mve_advance_vpt(env);                                           \
+    }
+
+#define DO_VQABS_B(N, SATP) \
+    do_sat_bhs(DO_ABS((int64_t)N), INT8_MIN, INT8_MAX, SATP)
+#define DO_VQABS_H(N, SATP) \
+    do_sat_bhs(DO_ABS((int64_t)N), INT16_MIN, INT16_MAX, SATP)
+#define DO_VQABS_W(N, SATP) \
+    do_sat_bhs(DO_ABS((int64_t)N), INT32_MIN, INT32_MAX, SATP)
+
+#define DO_VQNEG_B(N, SATP) do_sat_bhs(-(int64_t)N, INT8_MIN, INT8_MAX, SATP)
+#define DO_VQNEG_H(N, SATP) do_sat_bhs(-(int64_t)N, INT16_MIN, INT16_MAX, SATP)
+#define DO_VQNEG_W(N, SATP) do_sat_bhs(-(int64_t)N, INT32_MIN, INT32_MAX, SATP)
+
+DO_1OP_SAT(vqabsb, 1, int8_t, DO_VQABS_B)
+DO_1OP_SAT(vqabsh, 2, int16_t, DO_VQABS_H)
+DO_1OP_SAT(vqabsw, 4, int32_t, DO_VQABS_W)
+
+DO_1OP_SAT(vqnegb, 1, int8_t, DO_VQNEG_B)
+DO_1OP_SAT(vqnegh, 2, int16_t, DO_VQNEG_H)
+DO_1OP_SAT(vqnegw, 4, int32_t, DO_VQNEG_W)
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index e3e115c1aa9..f2213ec8cde 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -275,6 +275,8 @@ DO_1OP(VCLZ, vclz)
 DO_1OP(VCLS, vcls)
 DO_1OP(VABS, vabs)
 DO_1OP(VNEG, vneg)
+DO_1OP(VQABS, vqabs)
+DO_1OP(VQNEG, vqneg)
 
 /* Narrowing moves: only size 0 and 1 are valid */
 #define DO_VMOVN(INSN, FN) \
-- 
2.20.1

[PULL 29/44] target/arm: Implement MVE VMAXA, VMINA

[Peter Maydell]

Implement the MVE VMAXA and VMINA insns, which take the absolute
value of the signed elements in the input vector and then accumulate
the unsigned max or min into the destination vector.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    |  8 ++++++++
 target/arm/mve.decode      |  4 ++++
 target/arm/mve_helper.c    | 26 ++++++++++++++++++++++++++
 target/arm/translate-mve.c |  2 ++
 4 files changed, 40 insertions(+)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index f9345bfafc7..651020aaad8 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -84,6 +84,14 @@ DEF_HELPER_FLAGS_3(mve_vqnegb, TCG_CALL_NO_WG, void, env, ptr, ptr)
 DEF_HELPER_FLAGS_3(mve_vqnegh, TCG_CALL_NO_WG, void, env, ptr, ptr)
 DEF_HELPER_FLAGS_3(mve_vqnegw, TCG_CALL_NO_WG, void, env, ptr, ptr)
 
+DEF_HELPER_FLAGS_3(mve_vmaxab, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vmaxah, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vmaxaw, TCG_CALL_NO_WG, void, env, ptr, ptr)
+
+DEF_HELPER_FLAGS_3(mve_vminab, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vminah, TCG_CALL_NO_WG, void, env, ptr, ptr)
+DEF_HELPER_FLAGS_3(mve_vminaw, TCG_CALL_NO_WG, void, env, ptr, ptr)
+
 DEF_HELPER_FLAGS_3(mve_vmovnbb, TCG_CALL_NO_WG, void, env, ptr, ptr)
 DEF_HELPER_FLAGS_3(mve_vmovnbh, TCG_CALL_NO_WG, void, env, ptr, ptr)
 DEF_HELPER_FLAGS_3(mve_vmovntb, TCG_CALL_NO_WG, void, env, ptr, ptr)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index a05b882f9d9..0955ed0cc22 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -156,6 +156,8 @@ VMUL             1110 1111 0 . .. ... 0 ... 0 1001 . 1 . 1 ... 0 @2op
   VQMOVUNB       111 0 1110 0 . 11 .. 01 ... 0 1110 1 0 . 0 ... 1 @1op
   VQMOVN_BS      111 0 1110 0 . 11 .. 11 ... 0 1110 0 0 . 0 ... 1 @1op
 
+  VMAXA          111 0 1110 0 . 11 .. 11 ... 0 1110 1 0 . 0 ... 1 @1op
+
   VMULH_S        111 0 1110 0 . .. ...1 ... 0 1110 . 0 . 0 ... 1 @2op
 }
 
@@ -176,6 +178,8 @@ VMUL             1110 1111 0 . .. ... 0 ... 0 1001 . 1 . 1 ... 0 @2op
   VQMOVUNT       111 0 1110 0 . 11 .. 01 ... 1 1110 1 0 . 0 ... 1 @1op
   VQMOVN_TS      111 0 1110 0 . 11 .. 11 ... 1 1110 0 0 . 0 ... 1 @1op
 
+  VMINA          111 0 1110 0 . 11 .. 11 ... 1 1110 1 0 . 0 ... 1 @1op
+
   VRMULH_S       111 0 1110 0 . .. ...1 ... 1 1110 . 0 . 0 ... 1 @2op
 }
 
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index 6539012ddd8..d326205cbf0 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -2237,3 +2237,29 @@ DO_1OP_SAT(vqabsw, 4, int32_t, DO_VQABS_W)
 DO_1OP_SAT(vqnegb, 1, int8_t, DO_VQNEG_B)
 DO_1OP_SAT(vqnegh, 2, int16_t, DO_VQNEG_H)
 DO_1OP_SAT(vqnegw, 4, int32_t, DO_VQNEG_W)
+
+/*
+ * VMAXA, VMINA: vd is unsigned; vm is signed, and we take its
+ * absolute value; we then do an unsigned comparison.
+ */
+#define DO_VMAXMINA(OP, ESIZE, STYPE, UTYPE, FN)                        \
+    void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm)         \
+    {                                                                   \
+        UTYPE *d = vd;                                                  \
+        STYPE *m = vm;                                                  \
+        uint16_t mask = mve_element_mask(env);                          \
+        unsigned e;                                                     \
+        for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) {              \
+            UTYPE r = DO_ABS(m[H##ESIZE(e)]);                           \
+            r = FN(d[H##ESIZE(e)], r);                                  \
+            mergemask(&d[H##ESIZE(e)], r, mask);                        \
+        }                                                               \
+        mve_advance_vpt(env);                                           \
+    }
+
+DO_VMAXMINA(vmaxab, 1, int8_t, uint8_t, DO_MAX)
+DO_VMAXMINA(vmaxah, 2, int16_t, uint16_t, DO_MAX)
+DO_VMAXMINA(vmaxaw, 4, int32_t, uint32_t, DO_MAX)
+DO_VMAXMINA(vminab, 1, int8_t, uint8_t, DO_MIN)
+DO_VMAXMINA(vminah, 2, int16_t, uint16_t, DO_MIN)
+DO_VMAXMINA(vminaw, 4, int32_t, uint32_t, DO_MIN)
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index f2213ec8cde..02c26987a2d 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -277,6 +277,8 @@ DO_1OP(VABS, vabs)
 DO_1OP(VNEG, vneg)
 DO_1OP(VQABS, vqabs)
 DO_1OP(VQNEG, vqneg)
+DO_1OP(VMAXA, vmaxa)
+DO_1OP(VMINA, vmina)
 
 /* Narrowing moves: only size 0 and 1 are valid */
 #define DO_VMOVN(INSN, FN) \
-- 
2.20.1

[PULL 30/44] target/arm: Implement MVE VMOV to/from 2 general-purpose registers

[Peter Maydell]

Implement the MVE VMOV forms that move data between 2 general-purpose
registers and 2 32-bit lanes in a vector register.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/translate-a32.h |  1 +
 target/arm/mve.decode      |  4 ++
 target/arm/translate-mve.c | 85 ++++++++++++++++++++++++++++++++++++++
 target/arm/translate-vfp.c |  2 +-
 4 files changed, 91 insertions(+), 1 deletion(-)

diff --git a/target/arm/translate-a32.h b/target/arm/translate-a32.h
index 6dfcafe1796..6f4d65ddb00 100644
--- a/target/arm/translate-a32.h
+++ b/target/arm/translate-a32.h
@@ -49,6 +49,7 @@ void gen_rev16(TCGv_i32 dest, TCGv_i32 var);
 void clear_eci_state(DisasContext *s);
 bool mve_eci_check(DisasContext *s);
 void mve_update_and_store_eci(DisasContext *s);
+bool mve_skip_vmov(DisasContext *s, int vn, int index, int size);
 
 static inline TCGv_i32 load_cpu_offset(int offset)
 {
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index 0955ed0cc22..774ee2a1a5b 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -136,6 +136,10 @@ VLDR_VSTR        1110110 1 a:1 . w:1 . .... ... 111101 .......   @vldr_vstr \
 VLDR_VSTR        1110110 1 a:1 . w:1 . .... ... 111110 .......   @vldr_vstr \
                  size=2 p=1
 
+# Moves between 2 32-bit vector lanes and 2 general purpose registers
+VMOV_to_2gp      1110 1100 0 . 00 rt2:4 ... 0 1111 000 idx:1 rt:4 qd=%qd
+VMOV_from_2gp    1110 1100 0 . 01 rt2:4 ... 0 1111 000 idx:1 rt:4 qd=%qd
+
 # Vector 2-op
 VAND             1110 1111 0 . 00 ... 0 ... 0 0001 . 1 . 1 ... 0 @2op_nosz
 VBIC             1110 1111 0 . 01 ... 0 ... 0 0001 . 1 . 1 ... 0 @2op_nosz
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index 02c26987a2d..93707fdd681 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -1507,3 +1507,88 @@ static bool do_vabav(DisasContext *s, arg_vabav *a, MVEGenVABAVFn *fn)
 
 DO_VABAV(VABAV_S, vabavs)
 DO_VABAV(VABAV_U, vabavu)
+
+static bool trans_VMOV_to_2gp(DisasContext *s, arg_VMOV_to_2gp *a)
+{
+    /*
+     * VMOV two 32-bit vector lanes to two general-purpose registers.
+     * This insn is not predicated but it is subject to beat-wise
+     * execution if it is not in an IT block. For us this means
+     * only that if PSR.ECI says we should not be executing the beat
+     * corresponding to the lane of the vector register being accessed
+     * then we should skip perfoming the move, and that we need to do
+     * the usual check for bad ECI state and advance of ECI state.
+     * (If PSR.ECI is non-zero then we cannot be in an IT block.)
+     */
+    TCGv_i32 tmp;
+    int vd;
+
+    if (!dc_isar_feature(aa32_mve, s) || !mve_check_qreg_bank(s, a->qd) ||
+        a->rt == 13 || a->rt == 15 || a->rt2 == 13 || a->rt2 == 15 ||
+        a->rt == a->rt2) {
+        /* Rt/Rt2 cases are UNPREDICTABLE */
+        return false;
+    }
+    if (!mve_eci_check(s) || !vfp_access_check(s)) {
+        return true;
+    }
+
+    /* Convert Qreg index to Dreg for read_neon_element32() etc */
+    vd = a->qd * 2;
+
+    if (!mve_skip_vmov(s, vd, a->idx, MO_32)) {
+        tmp = tcg_temp_new_i32();
+        read_neon_element32(tmp, vd, a->idx, MO_32);
+        store_reg(s, a->rt, tmp);
+    }
+    if (!mve_skip_vmov(s, vd + 1, a->idx, MO_32)) {
+        tmp = tcg_temp_new_i32();
+        read_neon_element32(tmp, vd + 1, a->idx, MO_32);
+        store_reg(s, a->rt2, tmp);
+    }
+
+    mve_update_and_store_eci(s);
+    return true;
+}
+
+static bool trans_VMOV_from_2gp(DisasContext *s, arg_VMOV_to_2gp *a)
+{
+    /*
+     * VMOV two general-purpose registers to two 32-bit vector lanes.
+     * This insn is not predicated but it is subject to beat-wise
+     * execution if it is not in an IT block. For us this means
+     * only that if PSR.ECI says we should not be executing the beat
+     * corresponding to the lane of the vector register being accessed
+     * then we should skip perfoming the move, and that we need to do
+     * the usual check for bad ECI state and advance of ECI state.
+     * (If PSR.ECI is non-zero then we cannot be in an IT block.)
+     */
+    TCGv_i32 tmp;
+    int vd;
+
+    if (!dc_isar_feature(aa32_mve, s) || !mve_check_qreg_bank(s, a->qd) ||
+        a->rt == 13 || a->rt == 15 || a->rt2 == 13 || a->rt2 == 15) {
+        /* Rt/Rt2 cases are UNPREDICTABLE */
+        return false;
+    }
+    if (!mve_eci_check(s) || !vfp_access_check(s)) {
+        return true;
+    }
+
+    /* Convert Qreg idx to Dreg for read_neon_element32() etc */
+    vd = a->qd * 2;
+
+    if (!mve_skip_vmov(s, vd, a->idx, MO_32)) {
+        tmp = load_reg(s, a->rt);
+        write_neon_element32(tmp, vd, a->idx, MO_32);
+        tcg_temp_free_i32(tmp);
+    }
+    if (!mve_skip_vmov(s, vd + 1, a->idx, MO_32)) {
+        tmp = load_reg(s, a->rt2);
+        write_neon_element32(tmp, vd + 1, a->idx, MO_32);
+        tcg_temp_free_i32(tmp);
+    }
+
+    mve_update_and_store_eci(s);
+    return true;
+}
diff --git a/target/arm/translate-vfp.c b/target/arm/translate-vfp.c
index b2991e21ec7..e2eb797c829 100644
--- a/target/arm/translate-vfp.c
+++ b/target/arm/translate-vfp.c
@@ -581,7 +581,7 @@ static bool trans_VCVT(DisasContext *s, arg_VCVT *a)
     return true;
 }
 
-static bool mve_skip_vmov(DisasContext *s, int vn, int index, int size)
+bool mve_skip_vmov(DisasContext *s, int vn, int index, int size)
 {
     /*
      * In a CPU with MVE, the VMOV (vector lane to general-purpose register)
-- 
2.20.1

[PULL 31/44] target/arm: Implement MVE VPNOT

[Peter Maydell]

Implement the MVE VPNOT insn, which inverts the bits in VPR.P0
(subject to both predication and to beatwise execution).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    |  1 +
 target/arm/mve.decode      |  1 +
 target/arm/mve_helper.c    | 17 +++++++++++++++++
 target/arm/translate-mve.c | 19 +++++++++++++++++++
 4 files changed, 38 insertions(+)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index 651020aaad8..8cb941912fc 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -119,6 +119,7 @@ DEF_HELPER_FLAGS_4(mve_vorn, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 DEF_HELPER_FLAGS_4(mve_veor, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 
 DEF_HELPER_FLAGS_4(mve_vpsel, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
+DEF_HELPER_FLAGS_1(mve_vpnot, TCG_CALL_NO_WG, void, env)
 
 DEF_HELPER_FLAGS_4(mve_vaddb, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 DEF_HELPER_FLAGS_4(mve_vaddh, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index 774ee2a1a5b..40bd0c04b59 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -571,6 +571,7 @@ VCMPGT            1111 1110 0 . .. ... 1 ... 1 1111 0 0 . 0 ... 1 @vcmp
 VCMPLE            1111 1110 0 . .. ... 1 ... 1 1111 1 0 . 0 ... 1 @vcmp
 
 {
+  VPNOT           1111 1110 0 0 11 000 1 000 0 1111 0100 1101
   VPST            1111 1110 0 . 11 000 1 ... 0 1111 0100 1101 mask=%mask_22_13
   VCMPEQ_scalar   1111 1110 0 . .. ... 1 ... 0 1111 0 1 0 0 .... @vcmp_scalar
 }
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index d326205cbf0..c22a00c5ed6 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -2201,6 +2201,23 @@ void HELPER(mve_vpsel)(CPUARMState *env, void *vd, void *vn, void *vm)
     mve_advance_vpt(env);
 }
 
+void HELPER(mve_vpnot)(CPUARMState *env)
+{
+    /*
+     * P0 bits for unexecuted beats (where eci_mask is 0) are unchanged.
+     * P0 bits for predicated lanes in executed bits (where mask is 0) are 0.
+     * P0 bits otherwise are inverted.
+     * (This is the same logic as VCMP.)
+     * This insn is itself subject to predication and to beat-wise execution,
+     * and after it executes VPT state advances in the usual way.
+     */
+    uint16_t mask = mve_element_mask(env);
+    uint16_t eci_mask = mve_eci_mask(env);
+    uint16_t beatpred = ~env->v7m.vpr & mask;
+    env->v7m.vpr = (env->v7m.vpr & ~(uint32_t)eci_mask) | (beatpred & eci_mask);
+    mve_advance_vpt(env);
+}
+
 #define DO_1OP_SAT(OP, ESIZE, TYPE, FN)                                 \
     void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm)         \
     {                                                                   \
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index 93707fdd681..cc2e58cfe2f 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -887,6 +887,25 @@ static bool trans_VPST(DisasContext *s, arg_VPST *a)
     return true;
 }
 
+static bool trans_VPNOT(DisasContext *s, arg_VPNOT *a)
+{
+    /*
+     * Invert the predicate in VPR.P0. We have call out to
+     * a helper because this insn itself is beatwise and can
+     * be predicated.
+     */
+    if (!dc_isar_feature(aa32_mve, s)) {
+        return false;
+    }
+    if (!mve_eci_check(s) || !vfp_access_check(s)) {
+        return true;
+    }
+
+    gen_helper_mve_vpnot(cpu_env);
+    mve_update_eci(s);
+    return true;
+}
+
 static bool trans_VADDV(DisasContext *s, arg_VADDV *a)
 {
     /* VADDV: vector add across vector */
-- 
2.20.1

[PULL 32/44] target/arm: Implement MVE VCTP

[Peter Maydell]

Implement the MVE VCTP insn, which sets the VPR.P0 predicate bits so
as to predicate any element at index Rn or greater is predicated.  As
with VPNOT, this insn itself is predicable and subject to beatwise
execution.

The calculation of the mask is the same as is used to determine
ltpmask in mve_element_mask(), but we precalculate masklen in
generated code to avoid having to have 4 helpers specialized by size.

We put the decode line in with the low-overhead-loop insns in
t32.decode because it's logically part of that collection of insn
patterns, even though it is an MVE only insn.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    |  2 ++
 target/arm/translate-a32.h |  1 +
 target/arm/t32.decode      |  1 +
 target/arm/mve_helper.c    | 20 ++++++++++++++++++++
 target/arm/translate-mve.c |  2 +-
 target/arm/translate.c     | 33 +++++++++++++++++++++++++++++++++
 6 files changed, 58 insertions(+), 1 deletion(-)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index 8cb941912fc..b6cf3f0c94d 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -121,6 +121,8 @@ DEF_HELPER_FLAGS_4(mve_veor, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 DEF_HELPER_FLAGS_4(mve_vpsel, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 DEF_HELPER_FLAGS_1(mve_vpnot, TCG_CALL_NO_WG, void, env)
 
+DEF_HELPER_FLAGS_2(mve_vctp, TCG_CALL_NO_WG, void, env, i32)
+
 DEF_HELPER_FLAGS_4(mve_vaddb, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 DEF_HELPER_FLAGS_4(mve_vaddh, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
 DEF_HELPER_FLAGS_4(mve_vaddw, TCG_CALL_NO_WG, void, env, ptr, ptr, ptr)
diff --git a/target/arm/translate-a32.h b/target/arm/translate-a32.h
index 6f4d65ddb00..88f15df60e8 100644
--- a/target/arm/translate-a32.h
+++ b/target/arm/translate-a32.h
@@ -48,6 +48,7 @@ long neon_element_offset(int reg, int element, MemOp memop);
 void gen_rev16(TCGv_i32 dest, TCGv_i32 var);
 void clear_eci_state(DisasContext *s);
 bool mve_eci_check(DisasContext *s);
+void mve_update_eci(DisasContext *s);
 void mve_update_and_store_eci(DisasContext *s);
 bool mve_skip_vmov(DisasContext *s, int vn, int index, int size);
 
diff --git a/target/arm/t32.decode b/target/arm/t32.decode
index 2d47f31f143..78fadef9d62 100644
--- a/target/arm/t32.decode
+++ b/target/arm/t32.decode
@@ -748,5 +748,6 @@ BL               1111 0. .......... 11.1 ............         @branch24
       # This is DLSTP
       DLS        1111 0 0000 0 size:2 rn:4 1110 0000 0000 0001
     }
+    VCTP         1111 0 0000 0 size:2 rn:4 1110 1000 0000 0001
   ]
 }
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index c22a00c5ed6..1752555a218 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -2218,6 +2218,26 @@ void HELPER(mve_vpnot)(CPUARMState *env)
     mve_advance_vpt(env);
 }
 
+/*
+ * VCTP: P0 unexecuted bits unchanged, predicated bits zeroed,
+ * otherwise set according to value of Rn. The calculation of
+ * newmask here works in the same way as the calculation of the
+ * ltpmask in mve_element_mask(), but we have pre-calculated
+ * the masklen in the generated code.
+ */
+void HELPER(mve_vctp)(CPUARMState *env, uint32_t masklen)
+{
+    uint16_t mask = mve_element_mask(env);
+    uint16_t eci_mask = mve_eci_mask(env);
+    uint16_t newmask;
+
+    assert(masklen <= 16);
+    newmask = masklen ? MAKE_64BIT_MASK(0, masklen) : 0;
+    newmask &= mask;
+    env->v7m.vpr = (env->v7m.vpr & ~(uint32_t)eci_mask) | (newmask & eci_mask);
+    mve_advance_vpt(env);
+}
+
 #define DO_1OP_SAT(OP, ESIZE, TYPE, FN)                                 \
     void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm)         \
     {                                                                   \
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index cc2e58cfe2f..865d5acbe76 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -93,7 +93,7 @@ bool mve_eci_check(DisasContext *s)
     }
 }
 
-static void mve_update_eci(DisasContext *s)
+void mve_update_eci(DisasContext *s)
 {
     /*
      * The helper function will always update the CPUState field,
diff --git a/target/arm/translate.c b/target/arm/translate.c
index 80c282669f0..804a53279bd 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -8669,6 +8669,39 @@ static bool trans_LCTP(DisasContext *s, arg_LCTP *a)
     return true;
 }
 
+static bool trans_VCTP(DisasContext *s, arg_VCTP *a)
+{
+    /*
+     * M-profile Create Vector Tail Predicate. This insn is itself
+     * predicated and is subject to beatwise execution.
+     */
+    TCGv_i32 rn_shifted, masklen;
+
+    if (!dc_isar_feature(aa32_mve, s) || a->rn == 13 || a->rn == 15) {
+        return false;
+    }
+
+    if (!mve_eci_check(s) || !vfp_access_check(s)) {
+        return true;
+    }
+
+    /*
+     * We pre-calculate the mask length here to avoid having
+     * to have multiple helpers specialized for size.
+     * We pass the helper "rn <= (1 << (4 - size)) ? (rn << size) : 16".
+     */
+    rn_shifted = tcg_temp_new_i32();
+    masklen = load_reg(s, a->rn);
+    tcg_gen_shli_i32(rn_shifted, masklen, a->size);
+    tcg_gen_movcond_i32(TCG_COND_LEU, masklen,
+                        masklen, tcg_constant_i32(1 << (4 - a->size)),
+                        rn_shifted, tcg_constant_i32(16));
+    gen_helper_mve_vctp(cpu_env, masklen);
+    tcg_temp_free_i32(masklen);
+    tcg_temp_free_i32(rn_shifted);
+    mve_update_eci(s);
+    return true;
+}
 
 static bool op_tbranch(DisasContext *s, arg_tbranch *a, bool half)
 {
-- 
2.20.1

[PULL 33/44] target/arm: Implement MVE scatter-gather insns

[Peter Maydell]

Implement the MVE gather-loads and scatter-stores which
form the address by adding a base value from a scalar
register to an offset in each element of a vector.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    |  32 +++++++++
 target/arm/mve.decode      |  12 ++++
 target/arm/mve_helper.c    | 129 +++++++++++++++++++++++++++++++++++++
 target/arm/translate-mve.c |  97 ++++++++++++++++++++++++++++
 4 files changed, 270 insertions(+)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index b6cf3f0c94d..ba842b97c17 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -33,6 +33,38 @@ DEF_HELPER_FLAGS_3(mve_vstrb_h, TCG_CALL_NO_WG, void, env, ptr, i32)
 DEF_HELPER_FLAGS_3(mve_vstrb_w, TCG_CALL_NO_WG, void, env, ptr, i32)
 DEF_HELPER_FLAGS_3(mve_vstrh_w, TCG_CALL_NO_WG, void, env, ptr, i32)
 
+DEF_HELPER_FLAGS_4(mve_vldrb_sg_sh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vldrb_sg_sw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vldrh_sg_sw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_4(mve_vldrb_sg_ub, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vldrb_sg_uh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vldrb_sg_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vldrh_sg_uh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vldrh_sg_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vldrw_sg_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vldrd_sg_ud, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_4(mve_vstrb_sg_ub, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vstrb_sg_uh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vstrb_sg_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vstrh_sg_uh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vstrh_sg_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vstrw_sg_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vstrd_sg_ud, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_4(mve_vldrh_sg_os_sw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_4(mve_vldrh_sg_os_uh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vldrh_sg_os_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vldrw_sg_os_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vldrd_sg_os_ud, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+
+DEF_HELPER_FLAGS_4(mve_vstrh_sg_os_uh, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vstrh_sg_os_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vstrw_sg_os_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vstrd_sg_os_ud, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+
 DEF_HELPER_FLAGS_3(mve_vdup, TCG_CALL_NO_WG, void, env, ptr, i32)
 
 DEF_HELPER_FLAGS_4(mve_vidupb, TCG_CALL_NO_WG, i32, env, ptr, i32, i32)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index 40bd0c04b59..6c3f45c7195 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -42,11 +42,18 @@
 &shl_scalar qda rm size
 &vmaxv qm rda size
 &vabav qn qm rda size
+&vldst_sg qd qm rn size msize os
+
+# scatter-gather memory size is in bits 6:4
+%sg_msize 6:1 4:1
 
 @vldr_vstr ....... . . . . l:1 rn:4 ... ...... imm:7 &vldr_vstr qd=%qd u=0
 # Note that both Rn and Qd are 3 bits only (no D bit)
 @vldst_wn ... u:1 ... . . . . l:1 . rn:3 qd:3 . ... .. imm:7 &vldr_vstr
 
+@vldst_sg .... .... .... rn:4 .... ... size:2 ... ... os:1 &vldst_sg \
+          qd=%qd qm=%qm msize=%sg_msize
+
 @1op .... .... .... size:2 .. .... .... .... .... &1op qd=%qd qm=%qm
 @1op_nosz .... .... .... .... .... .... .... .... &1op qd=%qd qm=%qm size=0
 @2op .... .... .. size:2 .... .... .... .... .... &2op qd=%qd qm=%qm qn=%qn
@@ -136,6 +143,11 @@ VLDR_VSTR        1110110 1 a:1 . w:1 . .... ... 111101 .......   @vldr_vstr \
 VLDR_VSTR        1110110 1 a:1 . w:1 . .... ... 111110 .......   @vldr_vstr \
                  size=2 p=1
 
+# gather loads/scatter stores
+VLDR_S_sg        111 0 1100 1 . 01 .... ... 0 111 . .... .... @vldst_sg
+VLDR_U_sg        111 1 1100 1 . 01 .... ... 0 111 . .... .... @vldst_sg
+VSTR_sg          111 0 1100 1 . 00 .... ... 0 111 . .... .... @vldst_sg
+
 # Moves between 2 32-bit vector lanes and 2 general purpose registers
 VMOV_to_2gp      1110 1100 0 . 00 rt2:4 ... 0 1111 000 idx:1 rt:4 qd=%qd
 VMOV_from_2gp    1110 1100 0 . 01 rt2:4 ... 0 1111 000 idx:1 rt:4 qd=%qd
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index 1752555a218..2b882db1c3d 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -206,6 +206,135 @@ DO_VSTR(vstrh_w, 2, stw, 4, int32_t)
 #undef DO_VLDR
 #undef DO_VSTR
 
+/*
+ * Gather loads/scatter stores. Here each element of Qm specifies
+ * an offset to use from the base register Rm. In the _os_ versions
+ * that offset is scaled by the element size.
+ * For loads, predicated lanes are zeroed instead of retaining
+ * their previous values.
+ */
+#define DO_VLDR_SG(OP, LDTYPE, ESIZE, TYPE, OFFTYPE, ADDRFN)            \
+    void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm,         \
+                          uint32_t base)                                \
+    {                                                                   \
+        TYPE *d = vd;                                                   \
+        OFFTYPE *m = vm;                                                \
+        uint16_t mask = mve_element_mask(env);                          \
+        uint16_t eci_mask = mve_eci_mask(env);                          \
+        unsigned e;                                                     \
+        uint32_t addr;                                                  \
+        for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE, eci_mask >>= ESIZE) { \
+            if (!(eci_mask & 1)) {                                      \
+                continue;                                               \
+            }                                                           \
+            addr = ADDRFN(base, m[H##ESIZE(e)]);                        \
+            d[H##ESIZE(e)] = (mask & 1) ?                               \
+                cpu_##LDTYPE##_data_ra(env, addr, GETPC()) : 0;         \
+        }                                                               \
+        mve_advance_vpt(env);                                           \
+    }
+
+/* We know here TYPE is unsigned so always the same as the offset type */
+#define DO_VSTR_SG(OP, STTYPE, ESIZE, TYPE, ADDRFN)                     \
+    void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm,         \
+                          uint32_t base)                                \
+    {                                                                   \
+        TYPE *d = vd;                                                   \
+        TYPE *m = vm;                                                   \
+        uint16_t mask = mve_element_mask(env);                          \
+        unsigned e;                                                     \
+        uint32_t addr;                                                  \
+        for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) {              \
+            addr = ADDRFN(base, m[H##ESIZE(e)]);                        \
+            if (mask & 1) {                                             \
+                cpu_##STTYPE##_data_ra(env, addr, d[H##ESIZE(e)], GETPC()); \
+            }                                                           \
+        }                                                               \
+        mve_advance_vpt(env);                                           \
+    }
+
+/*
+ * 64-bit accesses are slightly different: they are done as two 32-bit
+ * accesses, controlled by the predicate mask for the relevant beat,
+ * and with a single 32-bit offset in the first of the two Qm elements.
+ * Note that for QEMU our IMPDEF AIRCR.ENDIANNESS is always 0 (little).
+ */
+#define DO_VLDR64_SG(OP, ADDRFN)                                        \
+    void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm,         \
+                          uint32_t base)                                \
+    {                                                                   \
+        uint32_t *d = vd;                                               \
+        uint32_t *m = vm;                                               \
+        uint16_t mask = mve_element_mask(env);                          \
+        uint16_t eci_mask = mve_eci_mask(env);                          \
+        unsigned e;                                                     \
+        uint32_t addr;                                                  \
+        for (e = 0; e < 16 / 4; e++, mask >>= 4, eci_mask >>= 4) {      \
+            if (!(eci_mask & 1)) {                                      \
+                continue;                                               \
+            }                                                           \
+            addr = ADDRFN(base, m[H4(e & ~1)]);                         \
+            addr += 4 * (e & 1);                                        \
+            d[H4(e)] = (mask & 1) ? cpu_ldl_data_ra(env, addr, GETPC()) : 0; \
+        }                                                               \
+        mve_advance_vpt(env);                                           \
+    }
+
+#define DO_VSTR64_SG(OP, ADDRFN)                                        \
+    void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm,         \
+                          uint32_t base)                                \
+    {                                                                   \
+        uint32_t *d = vd;                                               \
+        uint32_t *m = vm;                                               \
+        uint16_t mask = mve_element_mask(env);                          \
+        unsigned e;                                                     \
+        uint32_t addr;                                                  \
+        for (e = 0; e < 16 / 4; e++, mask >>= 4) {                      \
+            addr = ADDRFN(base, m[H4(e & ~1)]);                         \
+            addr += 4 * (e & 1);                                        \
+            if (mask & 1) {                                             \
+                cpu_stl_data_ra(env, addr, d[H4(e)], GETPC());          \
+            }                                                           \
+        }                                                               \
+        mve_advance_vpt(env);                                           \
+    }
+
+#define ADDR_ADD(BASE, OFFSET) ((BASE) + (OFFSET))
+#define ADDR_ADD_OSH(BASE, OFFSET) ((BASE) + ((OFFSET) << 1))
+#define ADDR_ADD_OSW(BASE, OFFSET) ((BASE) + ((OFFSET) << 2))
+#define ADDR_ADD_OSD(BASE, OFFSET) ((BASE) + ((OFFSET) << 3))
+
+DO_VLDR_SG(vldrb_sg_sh, ldsb, 2, int16_t, uint16_t, ADDR_ADD)
+DO_VLDR_SG(vldrb_sg_sw, ldsb, 4, int32_t, uint32_t, ADDR_ADD)
+DO_VLDR_SG(vldrh_sg_sw, ldsw, 4, int32_t, uint32_t, ADDR_ADD)
+
+DO_VLDR_SG(vldrb_sg_ub, ldub, 1, uint8_t, uint8_t, ADDR_ADD)
+DO_VLDR_SG(vldrb_sg_uh, ldub, 2, uint16_t, uint16_t, ADDR_ADD)
+DO_VLDR_SG(vldrb_sg_uw, ldub, 4, uint32_t, uint32_t, ADDR_ADD)
+DO_VLDR_SG(vldrh_sg_uh, lduw, 2, uint16_t, uint16_t, ADDR_ADD)
+DO_VLDR_SG(vldrh_sg_uw, lduw, 4, uint32_t, uint32_t, ADDR_ADD)
+DO_VLDR_SG(vldrw_sg_uw, ldl, 4, uint32_t, uint32_t, ADDR_ADD)
+DO_VLDR64_SG(vldrd_sg_ud, ADDR_ADD)
+
+DO_VLDR_SG(vldrh_sg_os_sw, ldsw, 4, int32_t, uint32_t, ADDR_ADD_OSH)
+DO_VLDR_SG(vldrh_sg_os_uh, lduw, 2, uint16_t, uint16_t, ADDR_ADD_OSH)
+DO_VLDR_SG(vldrh_sg_os_uw, lduw, 4, uint32_t, uint32_t, ADDR_ADD_OSH)
+DO_VLDR_SG(vldrw_sg_os_uw, ldl, 4, uint32_t, uint32_t, ADDR_ADD_OSW)
+DO_VLDR64_SG(vldrd_sg_os_ud, ADDR_ADD_OSD)
+
+DO_VSTR_SG(vstrb_sg_ub, stb, 1, uint8_t, ADDR_ADD)
+DO_VSTR_SG(vstrb_sg_uh, stb, 2, uint16_t, ADDR_ADD)
+DO_VSTR_SG(vstrb_sg_uw, stb, 4, uint32_t, ADDR_ADD)
+DO_VSTR_SG(vstrh_sg_uh, stw, 2, uint16_t, ADDR_ADD)
+DO_VSTR_SG(vstrh_sg_uw, stw, 4, uint32_t, ADDR_ADD)
+DO_VSTR_SG(vstrw_sg_uw, stl, 4, uint32_t, ADDR_ADD)
+DO_VSTR64_SG(vstrd_sg_ud, ADDR_ADD)
+
+DO_VSTR_SG(vstrh_sg_os_uh, stw, 2, uint16_t, ADDR_ADD_OSH)
+DO_VSTR_SG(vstrh_sg_os_uw, stw, 4, uint32_t, ADDR_ADD_OSH)
+DO_VSTR_SG(vstrw_sg_os_uw, stl, 4, uint32_t, ADDR_ADD_OSW)
+DO_VSTR64_SG(vstrd_sg_os_ud, ADDR_ADD_OSD)
+
 /*
  * The mergemask(D, R, M) macro performs the operation "*D = R" but
  * storing only the bytes which correspond to 1 bits in M,
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index 865d5acbe76..24d4e57ead4 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -34,6 +34,7 @@ static inline int vidup_imm(DisasContext *s, int x)
 #include "decode-mve.c.inc"
 
 typedef void MVEGenLdStFn(TCGv_ptr, TCGv_ptr, TCGv_i32);
+typedef void MVEGenLdStSGFn(TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_i32);
 typedef void MVEGenOneOpFn(TCGv_ptr, TCGv_ptr, TCGv_ptr);
 typedef void MVEGenTwoOpFn(TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_ptr);
 typedef void MVEGenTwoOpScalarFn(TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_i32);
@@ -209,6 +210,102 @@ DO_VLDST_WIDE_NARROW(VLDSTB_H, vldrb_sh, vldrb_uh, vstrb_h, MO_8)
 DO_VLDST_WIDE_NARROW(VLDSTB_W, vldrb_sw, vldrb_uw, vstrb_w, MO_8)
 DO_VLDST_WIDE_NARROW(VLDSTH_W, vldrh_sw, vldrh_uw, vstrh_w, MO_16)
 
+static bool do_ldst_sg(DisasContext *s, arg_vldst_sg *a, MVEGenLdStSGFn fn)
+{
+    TCGv_i32 addr;
+    TCGv_ptr qd, qm;
+
+    if (!dc_isar_feature(aa32_mve, s) ||
+        !mve_check_qreg_bank(s, a->qd | a->qm) ||
+        !fn || a->rn == 15) {
+        /* Rn case is UNPREDICTABLE */
+        return false;
+    }
+
+    if (!mve_eci_check(s) || !vfp_access_check(s)) {
+        return true;
+    }
+
+    addr = load_reg(s, a->rn);
+
+    qd = mve_qreg_ptr(a->qd);
+    qm = mve_qreg_ptr(a->qm);
+    fn(cpu_env, qd, qm, addr);
+    tcg_temp_free_ptr(qd);
+    tcg_temp_free_ptr(qm);
+    tcg_temp_free_i32(addr);
+    mve_update_eci(s);
+    return true;
+}
+
+/*
+ * The naming scheme here is "vldrb_sg_sh == in-memory byte loads
+ * signextended to halfword elements in register". _os_ indicates that
+ * the offsets in Qm should be scaled by the element size.
+ */
+/* This macro is just to make the arrays more compact in these functions */
+#define F(N) gen_helper_mve_##N
+
+/* VLDRB/VSTRB (ie msize 1) with OS=1 is UNPREDICTABLE; we UNDEF */
+static bool trans_VLDR_S_sg(DisasContext *s, arg_vldst_sg *a)
+{
+    static MVEGenLdStSGFn * const fns[2][4][4] = { {
+            { NULL, F(vldrb_sg_sh), F(vldrb_sg_sw), NULL },
+            { NULL, NULL,           F(vldrh_sg_sw), NULL },
+            { NULL, NULL,           NULL,           NULL },
+            { NULL, NULL,           NULL,           NULL }
+        }, {
+            { NULL, NULL,              NULL,              NULL },
+            { NULL, NULL,              F(vldrh_sg_os_sw), NULL },
+            { NULL, NULL,              NULL,              NULL },
+            { NULL, NULL,              NULL,              NULL }
+        }
+    };
+    if (a->qd == a->qm) {
+        return false; /* UNPREDICTABLE */
+    }
+    return do_ldst_sg(s, a, fns[a->os][a->msize][a->size]);
+}
+
+static bool trans_VLDR_U_sg(DisasContext *s, arg_vldst_sg *a)
+{
+    static MVEGenLdStSGFn * const fns[2][4][4] = { {
+            { F(vldrb_sg_ub), F(vldrb_sg_uh), F(vldrb_sg_uw), NULL },
+            { NULL,           F(vldrh_sg_uh), F(vldrh_sg_uw), NULL },
+            { NULL,           NULL,           F(vldrw_sg_uw), NULL },
+            { NULL,           NULL,           NULL,           F(vldrd_sg_ud) }
+        }, {
+            { NULL, NULL,              NULL,              NULL },
+            { NULL, F(vldrh_sg_os_uh), F(vldrh_sg_os_uw), NULL },
+            { NULL, NULL,              F(vldrw_sg_os_uw), NULL },
+            { NULL, NULL,              NULL,              F(vldrd_sg_os_ud) }
+        }
+    };
+    if (a->qd == a->qm) {
+        return false; /* UNPREDICTABLE */
+    }
+    return do_ldst_sg(s, a, fns[a->os][a->msize][a->size]);
+}
+
+static bool trans_VSTR_sg(DisasContext *s, arg_vldst_sg *a)
+{
+    static MVEGenLdStSGFn * const fns[2][4][4] = { {
+            { F(vstrb_sg_ub), F(vstrb_sg_uh), F(vstrb_sg_uw), NULL },
+            { NULL,           F(vstrh_sg_uh), F(vstrh_sg_uw), NULL },
+            { NULL,           NULL,           F(vstrw_sg_uw), NULL },
+            { NULL,           NULL,           NULL,           F(vstrd_sg_ud) }
+        }, {
+            { NULL, NULL,              NULL,              NULL },
+            { NULL, F(vstrh_sg_os_uh), F(vstrh_sg_os_uw), NULL },
+            { NULL, NULL,              F(vstrw_sg_os_uw), NULL },
+            { NULL, NULL,              NULL,              F(vstrd_sg_os_ud) }
+        }
+    };
+    return do_ldst_sg(s, a, fns[a->os][a->msize][a->size]);
+}
+
+#undef F
+
 static bool trans_VDUP(DisasContext *s, arg_VDUP *a)
 {
     TCGv_ptr qd;
-- 
2.20.1

[PULL 34/44] target/arm: Implement MVE scatter-gather immediate forms

[Peter Maydell]

Implement the MVE VLDR/VSTR insns which do scatter-gather using base
addresses from Qm plus or minus an immediate offset (possibly with
writeback). Note that writeback is not predicated but it does have
to honour ECI state, so we have to add an eci_mask check to the
VSTR_SG macros (the VLDR_SG macros already needed this to be able
to distinguish "skip beat" from "set predicated element to 0").

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    |  5 +++
 target/arm/mve.decode      | 10 +++++
 target/arm/mve_helper.c    | 91 ++++++++++++++++++++++++--------------
 target/arm/translate-mve.c | 72 ++++++++++++++++++++++++++++++
 4 files changed, 146 insertions(+), 32 deletions(-)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index ba842b97c17..a85a7e1b75d 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -65,6 +65,11 @@ DEF_HELPER_FLAGS_4(mve_vstrh_sg_os_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(mve_vstrw_sg_os_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(mve_vstrd_sg_os_ud, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 
+DEF_HELPER_FLAGS_4(mve_vldrw_sg_wb_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vldrd_sg_wb_ud, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vstrw_sg_wb_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+DEF_HELPER_FLAGS_4(mve_vstrd_sg_wb_ud, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
+
 DEF_HELPER_FLAGS_3(mve_vdup, TCG_CALL_NO_WG, void, env, ptr, i32)
 
 DEF_HELPER_FLAGS_4(mve_vidupb, TCG_CALL_NO_WG, i32, env, ptr, i32, i32)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index 6c3f45c7195..48882dd7f38 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -43,6 +43,7 @@
 &vmaxv qm rda size
 &vabav qn qm rda size
 &vldst_sg qd qm rn size msize os
+&vldst_sg_imm qd qm a w imm
 
 # scatter-gather memory size is in bits 6:4
 %sg_msize 6:1 4:1
@@ -54,6 +55,10 @@
 @vldst_sg .... .... .... rn:4 .... ... size:2 ... ... os:1 &vldst_sg \
           qd=%qd qm=%qm msize=%sg_msize
 
+# Qm is in the fields usually labeled Qn
+@vldst_sg_imm .... .... a:1 . w:1 . .... .... .... . imm:7 &vldst_sg_imm \
+              qd=%qd qm=%qn
+
 @1op .... .... .... size:2 .. .... .... .... .... &1op qd=%qd qm=%qm
 @1op_nosz .... .... .... .... .... .... .... .... &1op qd=%qd qm=%qm size=0
 @2op .... .... .. size:2 .... .... .... .... .... &2op qd=%qd qm=%qm qn=%qn
@@ -148,6 +153,11 @@ VLDR_S_sg        111 0 1100 1 . 01 .... ... 0 111 . .... .... @vldst_sg
 VLDR_U_sg        111 1 1100 1 . 01 .... ... 0 111 . .... .... @vldst_sg
 VSTR_sg          111 0 1100 1 . 00 .... ... 0 111 . .... .... @vldst_sg
 
+VLDRW_sg_imm     111 1 1101 ... 1 ... 0 ... 1 1110 .... .... @vldst_sg_imm
+VLDRD_sg_imm     111 1 1101 ... 1 ... 0 ... 1 1111 .... .... @vldst_sg_imm
+VSTRW_sg_imm     111 1 1101 ... 0 ... 0 ... 1 1110 .... .... @vldst_sg_imm
+VSTRD_sg_imm     111 1 1101 ... 0 ... 0 ... 1 1111 .... .... @vldst_sg_imm
+
 # Moves between 2 32-bit vector lanes and 2 general purpose registers
 VMOV_to_2gp      1110 1100 0 . 00 rt2:4 ... 0 1111 000 idx:1 rt:4 qd=%qd
 VMOV_from_2gp    1110 1100 0 . 01 rt2:4 ... 0 1111 000 idx:1 rt:4 qd=%qd
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index 2b882db1c3d..bbbaa538074 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -213,7 +213,7 @@ DO_VSTR(vstrh_w, 2, stw, 4, int32_t)
  * For loads, predicated lanes are zeroed instead of retaining
  * their previous values.
  */
-#define DO_VLDR_SG(OP, LDTYPE, ESIZE, TYPE, OFFTYPE, ADDRFN)            \
+#define DO_VLDR_SG(OP, LDTYPE, ESIZE, TYPE, OFFTYPE, ADDRFN, WB)        \
     void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm,         \
                           uint32_t base)                                \
     {                                                                   \
@@ -230,25 +230,35 @@ DO_VSTR(vstrh_w, 2, stw, 4, int32_t)
             addr = ADDRFN(base, m[H##ESIZE(e)]);                        \
             d[H##ESIZE(e)] = (mask & 1) ?                               \
                 cpu_##LDTYPE##_data_ra(env, addr, GETPC()) : 0;         \
+            if (WB) {                                                   \
+                m[H##ESIZE(e)] = addr;                                  \
+            }                                                           \
         }                                                               \
         mve_advance_vpt(env);                                           \
     }
 
 /* We know here TYPE is unsigned so always the same as the offset type */
-#define DO_VSTR_SG(OP, STTYPE, ESIZE, TYPE, ADDRFN)                     \
+#define DO_VSTR_SG(OP, STTYPE, ESIZE, TYPE, ADDRFN, WB)                 \
     void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm,         \
                           uint32_t base)                                \
     {                                                                   \
         TYPE *d = vd;                                                   \
         TYPE *m = vm;                                                   \
         uint16_t mask = mve_element_mask(env);                          \
+        uint16_t eci_mask = mve_eci_mask(env);                          \
         unsigned e;                                                     \
         uint32_t addr;                                                  \
-        for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) {              \
+        for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE, eci_mask >>= ESIZE) { \
+            if (!(eci_mask & 1)) {                                      \
+                continue;                                               \
+            }                                                           \
             addr = ADDRFN(base, m[H##ESIZE(e)]);                        \
             if (mask & 1) {                                             \
                 cpu_##STTYPE##_data_ra(env, addr, d[H##ESIZE(e)], GETPC()); \
             }                                                           \
+            if (WB) {                                                   \
+                m[H##ESIZE(e)] = addr;                                  \
+            }                                                           \
         }                                                               \
         mve_advance_vpt(env);                                           \
     }
@@ -258,8 +268,10 @@ DO_VSTR(vstrh_w, 2, stw, 4, int32_t)
  * accesses, controlled by the predicate mask for the relevant beat,
  * and with a single 32-bit offset in the first of the two Qm elements.
  * Note that for QEMU our IMPDEF AIRCR.ENDIANNESS is always 0 (little).
+ * Address writeback happens on the odd beats and updates the address
+ * stored in the even-beat element.
  */
-#define DO_VLDR64_SG(OP, ADDRFN)                                        \
+#define DO_VLDR64_SG(OP, ADDRFN, WB)                                    \
     void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm,         \
                           uint32_t base)                                \
     {                                                                   \
@@ -276,25 +288,35 @@ DO_VSTR(vstrh_w, 2, stw, 4, int32_t)
             addr = ADDRFN(base, m[H4(e & ~1)]);                         \
             addr += 4 * (e & 1);                                        \
             d[H4(e)] = (mask & 1) ? cpu_ldl_data_ra(env, addr, GETPC()) : 0; \
+            if (WB && (e & 1)) {                                        \
+                m[H4(e & ~1)] = addr - 4;                               \
+            }                                                           \
         }                                                               \
         mve_advance_vpt(env);                                           \
     }
 
-#define DO_VSTR64_SG(OP, ADDRFN)                                        \
+#define DO_VSTR64_SG(OP, ADDRFN, WB)                                    \
     void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm,         \
                           uint32_t base)                                \
     {                                                                   \
         uint32_t *d = vd;                                               \
         uint32_t *m = vm;                                               \
         uint16_t mask = mve_element_mask(env);                          \
+        uint16_t eci_mask = mve_eci_mask(env);                          \
         unsigned e;                                                     \
         uint32_t addr;                                                  \
-        for (e = 0; e < 16 / 4; e++, mask >>= 4) {                      \
+        for (e = 0; e < 16 / 4; e++, mask >>= 4, eci_mask >>= 4) {      \
+            if (!(eci_mask & 1)) {                                      \
+                continue;                                               \
+            }                                                           \
             addr = ADDRFN(base, m[H4(e & ~1)]);                         \
             addr += 4 * (e & 1);                                        \
             if (mask & 1) {                                             \
                 cpu_stl_data_ra(env, addr, d[H4(e)], GETPC());          \
             }                                                           \
+            if (WB && (e & 1)) {                                        \
+                m[H4(e & ~1)] = addr - 4;                               \
+            }                                                           \
         }                                                               \
         mve_advance_vpt(env);                                           \
     }
@@ -304,36 +326,41 @@ DO_VSTR(vstrh_w, 2, stw, 4, int32_t)
 #define ADDR_ADD_OSW(BASE, OFFSET) ((BASE) + ((OFFSET) << 2))
 #define ADDR_ADD_OSD(BASE, OFFSET) ((BASE) + ((OFFSET) << 3))
 
-DO_VLDR_SG(vldrb_sg_sh, ldsb, 2, int16_t, uint16_t, ADDR_ADD)
-DO_VLDR_SG(vldrb_sg_sw, ldsb, 4, int32_t, uint32_t, ADDR_ADD)
-DO_VLDR_SG(vldrh_sg_sw, ldsw, 4, int32_t, uint32_t, ADDR_ADD)
+DO_VLDR_SG(vldrb_sg_sh, ldsb, 2, int16_t, uint16_t, ADDR_ADD, false)
+DO_VLDR_SG(vldrb_sg_sw, ldsb, 4, int32_t, uint32_t, ADDR_ADD, false)
+DO_VLDR_SG(vldrh_sg_sw, ldsw, 4, int32_t, uint32_t, ADDR_ADD, false)
 
-DO_VLDR_SG(vldrb_sg_ub, ldub, 1, uint8_t, uint8_t, ADDR_ADD)
-DO_VLDR_SG(vldrb_sg_uh, ldub, 2, uint16_t, uint16_t, ADDR_ADD)
-DO_VLDR_SG(vldrb_sg_uw, ldub, 4, uint32_t, uint32_t, ADDR_ADD)
-DO_VLDR_SG(vldrh_sg_uh, lduw, 2, uint16_t, uint16_t, ADDR_ADD)
-DO_VLDR_SG(vldrh_sg_uw, lduw, 4, uint32_t, uint32_t, ADDR_ADD)
-DO_VLDR_SG(vldrw_sg_uw, ldl, 4, uint32_t, uint32_t, ADDR_ADD)
-DO_VLDR64_SG(vldrd_sg_ud, ADDR_ADD)
+DO_VLDR_SG(vldrb_sg_ub, ldub, 1, uint8_t, uint8_t, ADDR_ADD, false)
+DO_VLDR_SG(vldrb_sg_uh, ldub, 2, uint16_t, uint16_t, ADDR_ADD, false)
+DO_VLDR_SG(vldrb_sg_uw, ldub, 4, uint32_t, uint32_t, ADDR_ADD, false)
+DO_VLDR_SG(vldrh_sg_uh, lduw, 2, uint16_t, uint16_t, ADDR_ADD, false)
+DO_VLDR_SG(vldrh_sg_uw, lduw, 4, uint32_t, uint32_t, ADDR_ADD, false)
+DO_VLDR_SG(vldrw_sg_uw, ldl, 4, uint32_t, uint32_t, ADDR_ADD, false)
+DO_VLDR64_SG(vldrd_sg_ud, ADDR_ADD, false)
 
-DO_VLDR_SG(vldrh_sg_os_sw, ldsw, 4, int32_t, uint32_t, ADDR_ADD_OSH)
-DO_VLDR_SG(vldrh_sg_os_uh, lduw, 2, uint16_t, uint16_t, ADDR_ADD_OSH)
-DO_VLDR_SG(vldrh_sg_os_uw, lduw, 4, uint32_t, uint32_t, ADDR_ADD_OSH)
-DO_VLDR_SG(vldrw_sg_os_uw, ldl, 4, uint32_t, uint32_t, ADDR_ADD_OSW)
-DO_VLDR64_SG(vldrd_sg_os_ud, ADDR_ADD_OSD)
+DO_VLDR_SG(vldrh_sg_os_sw, ldsw, 4, int32_t, uint32_t, ADDR_ADD_OSH, false)
+DO_VLDR_SG(vldrh_sg_os_uh, lduw, 2, uint16_t, uint16_t, ADDR_ADD_OSH, false)
+DO_VLDR_SG(vldrh_sg_os_uw, lduw, 4, uint32_t, uint32_t, ADDR_ADD_OSH, false)
+DO_VLDR_SG(vldrw_sg_os_uw, ldl, 4, uint32_t, uint32_t, ADDR_ADD_OSW, false)
+DO_VLDR64_SG(vldrd_sg_os_ud, ADDR_ADD_OSD, false)
 
-DO_VSTR_SG(vstrb_sg_ub, stb, 1, uint8_t, ADDR_ADD)
-DO_VSTR_SG(vstrb_sg_uh, stb, 2, uint16_t, ADDR_ADD)
-DO_VSTR_SG(vstrb_sg_uw, stb, 4, uint32_t, ADDR_ADD)
-DO_VSTR_SG(vstrh_sg_uh, stw, 2, uint16_t, ADDR_ADD)
-DO_VSTR_SG(vstrh_sg_uw, stw, 4, uint32_t, ADDR_ADD)
-DO_VSTR_SG(vstrw_sg_uw, stl, 4, uint32_t, ADDR_ADD)
-DO_VSTR64_SG(vstrd_sg_ud, ADDR_ADD)
+DO_VSTR_SG(vstrb_sg_ub, stb, 1, uint8_t, ADDR_ADD, false)
+DO_VSTR_SG(vstrb_sg_uh, stb, 2, uint16_t, ADDR_ADD, false)
+DO_VSTR_SG(vstrb_sg_uw, stb, 4, uint32_t, ADDR_ADD, false)
+DO_VSTR_SG(vstrh_sg_uh, stw, 2, uint16_t, ADDR_ADD, false)
+DO_VSTR_SG(vstrh_sg_uw, stw, 4, uint32_t, ADDR_ADD, false)
+DO_VSTR_SG(vstrw_sg_uw, stl, 4, uint32_t, ADDR_ADD, false)
+DO_VSTR64_SG(vstrd_sg_ud, ADDR_ADD, false)
 
-DO_VSTR_SG(vstrh_sg_os_uh, stw, 2, uint16_t, ADDR_ADD_OSH)
-DO_VSTR_SG(vstrh_sg_os_uw, stw, 4, uint32_t, ADDR_ADD_OSH)
-DO_VSTR_SG(vstrw_sg_os_uw, stl, 4, uint32_t, ADDR_ADD_OSW)
-DO_VSTR64_SG(vstrd_sg_os_ud, ADDR_ADD_OSD)
+DO_VSTR_SG(vstrh_sg_os_uh, stw, 2, uint16_t, ADDR_ADD_OSH, false)
+DO_VSTR_SG(vstrh_sg_os_uw, stw, 4, uint32_t, ADDR_ADD_OSH, false)
+DO_VSTR_SG(vstrw_sg_os_uw, stl, 4, uint32_t, ADDR_ADD_OSW, false)
+DO_VSTR64_SG(vstrd_sg_os_ud, ADDR_ADD_OSD, false)
+
+DO_VLDR_SG(vldrw_sg_wb_uw, ldl, 4, uint32_t, uint32_t, ADDR_ADD, true)
+DO_VLDR64_SG(vldrd_sg_wb_ud, ADDR_ADD, true)
+DO_VSTR_SG(vstrw_sg_wb_uw, stl, 4, uint32_t, ADDR_ADD, true)
+DO_VSTR64_SG(vstrd_sg_wb_ud, ADDR_ADD, true)
 
 /*
  * The mergemask(D, R, M) macro performs the operation "*D = R" but
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index 24d4e57ead4..d3cb3396863 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -306,6 +306,78 @@ static bool trans_VSTR_sg(DisasContext *s, arg_vldst_sg *a)
 
 #undef F
 
+static bool do_ldst_sg_imm(DisasContext *s, arg_vldst_sg_imm *a,
+                           MVEGenLdStSGFn *fn, unsigned msize)
+{
+    uint32_t offset;
+    TCGv_ptr qd, qm;
+
+    if (!dc_isar_feature(aa32_mve, s) ||
+        !mve_check_qreg_bank(s, a->qd | a->qm) ||
+        !fn) {
+        return false;
+    }
+
+    if (!mve_eci_check(s) || !vfp_access_check(s)) {
+        return true;
+    }
+
+    offset = a->imm << msize;
+    if (!a->a) {
+        offset = -offset;
+    }
+
+    qd = mve_qreg_ptr(a->qd);
+    qm = mve_qreg_ptr(a->qm);
+    fn(cpu_env, qd, qm, tcg_constant_i32(offset));
+    tcg_temp_free_ptr(qd);
+    tcg_temp_free_ptr(qm);
+    mve_update_eci(s);
+    return true;
+}
+
+static bool trans_VLDRW_sg_imm(DisasContext *s, arg_vldst_sg_imm *a)
+{
+    static MVEGenLdStSGFn * const fns[] = {
+        gen_helper_mve_vldrw_sg_uw,
+        gen_helper_mve_vldrw_sg_wb_uw,
+    };
+    if (a->qd == a->qm) {
+        return false; /* UNPREDICTABLE */
+    }
+    return do_ldst_sg_imm(s, a, fns[a->w], MO_32);
+}
+
+static bool trans_VLDRD_sg_imm(DisasContext *s, arg_vldst_sg_imm *a)
+{
+    static MVEGenLdStSGFn * const fns[] = {
+        gen_helper_mve_vldrd_sg_ud,
+        gen_helper_mve_vldrd_sg_wb_ud,
+    };
+    if (a->qd == a->qm) {
+        return false; /* UNPREDICTABLE */
+    }
+    return do_ldst_sg_imm(s, a, fns[a->w], MO_64);
+}
+
+static bool trans_VSTRW_sg_imm(DisasContext *s, arg_vldst_sg_imm *a)
+{
+    static MVEGenLdStSGFn * const fns[] = {
+        gen_helper_mve_vstrw_sg_uw,
+        gen_helper_mve_vstrw_sg_wb_uw,
+    };
+    return do_ldst_sg_imm(s, a, fns[a->w], MO_32);
+}
+
+static bool trans_VSTRD_sg_imm(DisasContext *s, arg_vldst_sg_imm *a)
+{
+    static MVEGenLdStSGFn * const fns[] = {
+        gen_helper_mve_vstrd_sg_ud,
+        gen_helper_mve_vstrd_sg_wb_ud,
+    };
+    return do_ldst_sg_imm(s, a, fns[a->w], MO_64);
+}
+
 static bool trans_VDUP(DisasContext *s, arg_VDUP *a)
 {
     TCGv_ptr qd;
-- 
2.20.1

[PULL 35/44] target/arm: Implement MVE interleaving loads/stores

[Peter Maydell]

Implement the MVE interleaving load/store functions VLD2, VLD4, VST2
and VST4.  VLD2 loads 16 bytes of data from memory and writes to 2
consecutive Qregs; VLD4 loads 16 bytes of data from memory and writes
to 4 consecutive Qregs.  The 'pattern' field in the encoding
determines the offset into memory which is accessed and also which
elements in the Qregs are written to.  (The intention is that a
sequence of four consecutive VLD4 with different pattern values
performs a complete de-interleaving load of 64 bytes into all
elements of the 4 Qregs.) VST2 and VST4 do the same, but for stores.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper-mve.h    |  48 ++++++
 target/arm/mve.decode      |  11 ++
 target/arm/mve_helper.c    | 342 +++++++++++++++++++++++++++++++++++++
 target/arm/translate-mve.c |  94 ++++++++++
 4 files changed, 495 insertions(+)

diff --git a/target/arm/helper-mve.h b/target/arm/helper-mve.h
index a85a7e1b75d..3db9b15f121 100644
--- a/target/arm/helper-mve.h
+++ b/target/arm/helper-mve.h
@@ -70,6 +70,54 @@ DEF_HELPER_FLAGS_4(mve_vldrd_sg_wb_ud, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(mve_vstrw_sg_wb_uw, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 DEF_HELPER_FLAGS_4(mve_vstrd_sg_wb_ud, TCG_CALL_NO_WG, void, env, ptr, ptr, i32)
 
+DEF_HELPER_FLAGS_3(mve_vld20b, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vld20h, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vld20w, TCG_CALL_NO_WG, void, env, i32, i32)
+
+DEF_HELPER_FLAGS_3(mve_vld21b, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vld21h, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vld21w, TCG_CALL_NO_WG, void, env, i32, i32)
+
+DEF_HELPER_FLAGS_3(mve_vld40b, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vld40h, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vld40w, TCG_CALL_NO_WG, void, env, i32, i32)
+
+DEF_HELPER_FLAGS_3(mve_vld41b, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vld41h, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vld41w, TCG_CALL_NO_WG, void, env, i32, i32)
+
+DEF_HELPER_FLAGS_3(mve_vld42b, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vld42h, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vld42w, TCG_CALL_NO_WG, void, env, i32, i32)
+
+DEF_HELPER_FLAGS_3(mve_vld43b, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vld43h, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vld43w, TCG_CALL_NO_WG, void, env, i32, i32)
+
+DEF_HELPER_FLAGS_3(mve_vst20b, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vst20h, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vst20w, TCG_CALL_NO_WG, void, env, i32, i32)
+
+DEF_HELPER_FLAGS_3(mve_vst21b, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vst21h, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vst21w, TCG_CALL_NO_WG, void, env, i32, i32)
+
+DEF_HELPER_FLAGS_3(mve_vst40b, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vst40h, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vst40w, TCG_CALL_NO_WG, void, env, i32, i32)
+
+DEF_HELPER_FLAGS_3(mve_vst41b, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vst41h, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vst41w, TCG_CALL_NO_WG, void, env, i32, i32)
+
+DEF_HELPER_FLAGS_3(mve_vst42b, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vst42h, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vst42w, TCG_CALL_NO_WG, void, env, i32, i32)
+
+DEF_HELPER_FLAGS_3(mve_vst43b, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vst43h, TCG_CALL_NO_WG, void, env, i32, i32)
+DEF_HELPER_FLAGS_3(mve_vst43w, TCG_CALL_NO_WG, void, env, i32, i32)
+
 DEF_HELPER_FLAGS_3(mve_vdup, TCG_CALL_NO_WG, void, env, ptr, i32)
 
 DEF_HELPER_FLAGS_4(mve_vidupb, TCG_CALL_NO_WG, i32, env, ptr, i32, i32)
diff --git a/target/arm/mve.decode b/target/arm/mve.decode
index 48882dd7f38..87446816293 100644
--- a/target/arm/mve.decode
+++ b/target/arm/mve.decode
@@ -44,6 +44,7 @@
 &vabav qn qm rda size
 &vldst_sg qd qm rn size msize os
 &vldst_sg_imm qd qm a w imm
+&vldst_il qd rn size pat w
 
 # scatter-gather memory size is in bits 6:4
 %sg_msize 6:1 4:1
@@ -59,6 +60,10 @@
 @vldst_sg_imm .... .... a:1 . w:1 . .... .... .... . imm:7 &vldst_sg_imm \
               qd=%qd qm=%qn
 
+# Deinterleaving load/interleaving store
+@vldst_il .... .... .. w:1 . rn:4 .... ... size:2 pat:2 ..... &vldst_il \
+          qd=%qd
+
 @1op .... .... .... size:2 .. .... .... .... .... &1op qd=%qd qm=%qm
 @1op_nosz .... .... .... .... .... .... .... .... &1op qd=%qd qm=%qm size=0
 @2op .... .... .. size:2 .... .... .... .... .... &2op qd=%qd qm=%qm qn=%qn
@@ -158,6 +163,12 @@ VLDRD_sg_imm     111 1 1101 ... 1 ... 0 ... 1 1111 .... .... @vldst_sg_imm
 VSTRW_sg_imm     111 1 1101 ... 0 ... 0 ... 1 1110 .... .... @vldst_sg_imm
 VSTRD_sg_imm     111 1 1101 ... 0 ... 0 ... 1 1111 .... .... @vldst_sg_imm
 
+# deinterleaving loads/interleaving stores
+VLD2             1111 1100 1 .. 1 .... ... 1 111 .. .. 00000 @vldst_il
+VLD4             1111 1100 1 .. 1 .... ... 1 111 .. .. 00001 @vldst_il
+VST2             1111 1100 1 .. 0 .... ... 1 111 .. .. 00000 @vldst_il
+VST4             1111 1100 1 .. 0 .... ... 1 111 .. .. 00001 @vldst_il
+
 # Moves between 2 32-bit vector lanes and 2 general purpose registers
 VMOV_to_2gp      1110 1100 0 . 00 rt2:4 ... 0 1111 000 idx:1 rt:4 qd=%qd
 VMOV_from_2gp    1110 1100 0 . 01 rt2:4 ... 0 1111 000 idx:1 rt:4 qd=%qd
diff --git a/target/arm/mve_helper.c b/target/arm/mve_helper.c
index bbbaa538074..c2826eb5f9f 100644
--- a/target/arm/mve_helper.c
+++ b/target/arm/mve_helper.c
@@ -362,6 +362,348 @@ DO_VLDR64_SG(vldrd_sg_wb_ud, ADDR_ADD, true)
 DO_VSTR_SG(vstrw_sg_wb_uw, stl, 4, uint32_t, ADDR_ADD, true)
 DO_VSTR64_SG(vstrd_sg_wb_ud, ADDR_ADD, true)
 
+/*
+ * Deinterleaving loads/interleaving stores.
+ *
+ * For these helpers we are passed the index of the first Qreg
+ * (VLD2/VST2 will also access Qn+1, VLD4/VST4 access Qn .. Qn+3)
+ * and the value of the base address register Rn.
+ * The helpers are specialized for pattern and element size, so
+ * for instance vld42h is VLD4 with pattern 2, element size MO_16.
+ *
+ * These insns are beatwise but not predicated, so we must honour ECI,
+ * but need not look at mve_element_mask().
+ *
+ * The pseudocode implements these insns with multiple memory accesses
+ * of the element size, but rules R_VVVG and R_FXDM permit us to make
+ * one 32-bit memory access per beat.
+ */
+#define DO_VLD4B(OP, O1, O2, O3, O4)                                    \
+    void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx,             \
+                          uint32_t base)                                \
+    {                                                                   \
+        int beat, e;                                                    \
+        uint16_t mask = mve_eci_mask(env);                              \
+        static const uint8_t off[4] = { O1, O2, O3, O4 };               \
+        uint32_t addr, data;                                            \
+        for (beat = 0; beat < 4; beat++, mask >>= 4) {                  \
+            if ((mask & 1) == 0) {                                      \
+                /* ECI says skip this beat */                           \
+                continue;                                               \
+            }                                                           \
+            addr = base + off[beat] * 4;                                \
+            data = cpu_ldl_le_data_ra(env, addr, GETPC());              \
+            for (e = 0; e < 4; e++, data >>= 8) {                       \
+                uint8_t *qd = (uint8_t *)aa32_vfp_qreg(env, qnidx + e); \
+                qd[H1(off[beat])] = data;                               \
+            }                                                           \
+        }                                                               \
+    }
+
+#define DO_VLD4H(OP, O1, O2)                                            \
+    void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx,             \
+                          uint32_t base)                                \
+    {                                                                   \
+        int beat;                                                       \
+        uint16_t mask = mve_eci_mask(env);                              \
+        static const uint8_t off[4] = { O1, O1, O2, O2 };               \
+        uint32_t addr, data;                                            \
+        int y; /* y counts 0 2 0 2 */                                   \
+        uint16_t *qd;                                                   \
+        for (beat = 0, y = 0; beat < 4; beat++, mask >>= 4, y ^= 2) {   \
+            if ((mask & 1) == 0) {                                      \
+                /* ECI says skip this beat */                           \
+                continue;                                               \
+            }                                                           \
+            addr = base + off[beat] * 8 + (beat & 1) * 4;               \
+            data = cpu_ldl_le_data_ra(env, addr, GETPC());              \
+            qd = (uint16_t *)aa32_vfp_qreg(env, qnidx + y);             \
+            qd[H2(off[beat])] = data;                                   \
+            data >>= 16;                                                \
+            qd = (uint16_t *)aa32_vfp_qreg(env, qnidx + y + 1);         \
+            qd[H2(off[beat])] = data;                                   \
+        }                                                               \
+    }
+
+#define DO_VLD4W(OP, O1, O2, O3, O4)                                    \
+    void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx,             \
+                          uint32_t base)                                \
+    {                                                                   \
+        int beat;                                                       \
+        uint16_t mask = mve_eci_mask(env);                              \
+        static const uint8_t off[4] = { O1, O2, O3, O4 };               \
+        uint32_t addr, data;                                            \
+        uint32_t *qd;                                                   \
+        int y;                                                          \
+        for (beat = 0; beat < 4; beat++, mask >>= 4) {                  \
+            if ((mask & 1) == 0) {                                      \
+                /* ECI says skip this beat */                           \
+                continue;                                               \
+            }                                                           \
+            addr = base + off[beat] * 4;                                \
+            data = cpu_ldl_le_data_ra(env, addr, GETPC());              \
+            y = (beat + (O1 & 2)) & 3;                                  \
+            qd = (uint32_t *)aa32_vfp_qreg(env, qnidx + y);             \
+            qd[H4(off[beat] >> 2)] = data;                              \
+        }                                                               \
+    }
+
+DO_VLD4B(vld40b, 0, 1, 10, 11)
+DO_VLD4B(vld41b, 2, 3, 12, 13)
+DO_VLD4B(vld42b, 4, 5, 14, 15)
+DO_VLD4B(vld43b, 6, 7, 8, 9)
+
+DO_VLD4H(vld40h, 0, 5)
+DO_VLD4H(vld41h, 1, 6)
+DO_VLD4H(vld42h, 2, 7)
+DO_VLD4H(vld43h, 3, 4)
+
+DO_VLD4W(vld40w, 0, 1, 10, 11)
+DO_VLD4W(vld41w, 2, 3, 12, 13)
+DO_VLD4W(vld42w, 4, 5, 14, 15)
+DO_VLD4W(vld43w, 6, 7, 8, 9)
+
+#define DO_VLD2B(OP, O1, O2, O3, O4)                                    \
+    void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx,             \
+                          uint32_t base)                                \
+    {                                                                   \
+        int beat, e;                                                    \
+        uint16_t mask = mve_eci_mask(env);                              \
+        static const uint8_t off[4] = { O1, O2, O3, O4 };               \
+        uint32_t addr, data;                                            \
+        uint8_t *qd;                                                    \
+        for (beat = 0; beat < 4; beat++, mask >>= 4) {                  \
+            if ((mask & 1) == 0) {                                      \
+                /* ECI says skip this beat */                           \
+                continue;                                               \
+            }                                                           \
+            addr = base + off[beat] * 2;                                \
+            data = cpu_ldl_le_data_ra(env, addr, GETPC());              \
+            for (e = 0; e < 4; e++, data >>= 8) {                       \
+                qd = (uint8_t *)aa32_vfp_qreg(env, qnidx + (e & 1));    \
+                qd[H1(off[beat] + (e >> 1))] = data;                    \
+            }                                                           \
+        }                                                               \
+    }
+
+#define DO_VLD2H(OP, O1, O2, O3, O4)                                    \
+    void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx,             \
+                          uint32_t base)                                \
+    {                                                                   \
+        int beat;                                                       \
+        uint16_t mask = mve_eci_mask(env);                              \
+        static const uint8_t off[4] = { O1, O2, O3, O4 };               \
+        uint32_t addr, data;                                            \
+        int e;                                                          \
+        uint16_t *qd;                                                   \
+        for (beat = 0; beat < 4; beat++, mask >>= 4) {                  \
+            if ((mask & 1) == 0) {                                      \
+                /* ECI says skip this beat */                           \
+                continue;                                               \
+            }                                                           \
+            addr = base + off[beat] * 4;                                \
+            data = cpu_ldl_le_data_ra(env, addr, GETPC());              \
+            for (e = 0; e < 2; e++, data >>= 16) {                      \
+                qd = (uint16_t *)aa32_vfp_qreg(env, qnidx + e);         \
+                qd[H2(off[beat])] = data;                               \
+            }                                                           \
+        }                                                               \
+    }
+
+#define DO_VLD2W(OP, O1, O2, O3, O4)                                    \
+    void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx,             \
+                          uint32_t base)                                \
+    {                                                                   \
+        int beat;                                                       \
+        uint16_t mask = mve_eci_mask(env);                              \
+        static const uint8_t off[4] = { O1, O2, O3, O4 };               \
+        uint32_t addr, data;                                            \
+        uint32_t *qd;                                                   \
+        for (beat = 0; beat < 4; beat++, mask >>= 4) {                  \
+            if ((mask & 1) == 0) {                                      \
+                /* ECI says skip this beat */                           \
+                continue;                                               \
+            }                                                           \
+            addr = base + off[beat];                                    \
+            data = cpu_ldl_le_data_ra(env, addr, GETPC());              \
+            qd = (uint32_t *)aa32_vfp_qreg(env, qnidx + (beat & 1));    \
+            qd[H4(off[beat] >> 3)] = data;                              \
+        }                                                               \
+    }
+
+DO_VLD2B(vld20b, 0, 2, 12, 14)
+DO_VLD2B(vld21b, 4, 6, 8, 10)
+
+DO_VLD2H(vld20h, 0, 1, 6, 7)
+DO_VLD2H(vld21h, 2, 3, 4, 5)
+
+DO_VLD2W(vld20w, 0, 4, 24, 28)
+DO_VLD2W(vld21w, 8, 12, 16, 20)
+
+#define DO_VST4B(OP, O1, O2, O3, O4)                                    \
+    void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx,             \
+                          uint32_t base)                                \
+    {                                                                   \
+        int beat, e;                                                    \
+        uint16_t mask = mve_eci_mask(env);                              \
+        static const uint8_t off[4] = { O1, O2, O3, O4 };               \
+        uint32_t addr, data;                                            \
+        for (beat = 0; beat < 4; beat++, mask >>= 4) {                  \
+            if ((mask & 1) == 0) {                                      \
+                /* ECI says skip this beat */                           \
+                continue;                                               \
+            }                                                           \
+            addr = base + off[beat] * 4;                                \
+            data = 0;                                                   \
+            for (e = 3; e >= 0; e--) {                                  \
+                uint8_t *qd = (uint8_t *)aa32_vfp_qreg(env, qnidx + e); \
+                data = (data << 8) | qd[H1(off[beat])];                 \
+            }                                                           \
+            cpu_stl_le_data_ra(env, addr, data, GETPC());               \
+        }                                                               \
+    }
+
+#define DO_VST4H(OP, O1, O2)                                            \
+    void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx,             \
+                          uint32_t base)                                \
+    {                                                                   \
+        int beat;                                                       \
+        uint16_t mask = mve_eci_mask(env);                              \
+        static const uint8_t off[4] = { O1, O1, O2, O2 };               \
+        uint32_t addr, data;                                            \
+        int y; /* y counts 0 2 0 2 */                                   \
+        uint16_t *qd;                                                   \
+        for (beat = 0, y = 0; beat < 4; beat++, mask >>= 4, y ^= 2) {   \
+            if ((mask & 1) == 0) {                                      \
+                /* ECI says skip this beat */                           \
+                continue;                                               \
+            }                                                           \
+            addr = base + off[beat] * 8 + (beat & 1) * 4;               \
+            qd = (uint16_t *)aa32_vfp_qreg(env, qnidx + y);             \
+            data = qd[H2(off[beat])];                                   \
+            qd = (uint16_t *)aa32_vfp_qreg(env, qnidx + y + 1);         \
+            data |= qd[H2(off[beat])] << 16;                            \
+            cpu_stl_le_data_ra(env, addr, data, GETPC());               \
+        }                                                               \
+    }
+
+#define DO_VST4W(OP, O1, O2, O3, O4)                                    \
+    void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx,             \
+                          uint32_t base)                                \
+    {                                                                   \
+        int beat;                                                       \
+        uint16_t mask = mve_eci_mask(env);                              \
+        static const uint8_t off[4] = { O1, O2, O3, O4 };               \
+        uint32_t addr, data;                                            \
+        uint32_t *qd;                                                   \
+        int y;                                                          \
+        for (beat = 0; beat < 4; beat++, mask >>= 4) {                  \
+            if ((mask & 1) == 0) {                                      \
+                /* ECI says skip this beat */                           \
+                continue;                                               \
+            }                                                           \
+            addr = base + off[beat] * 4;                                \
+            y = (beat + (O1 & 2)) & 3;                                  \
+            qd = (uint32_t *)aa32_vfp_qreg(env, qnidx + y);             \
+            data = qd[H4(off[beat] >> 2)];                              \
+            cpu_stl_le_data_ra(env, addr, data, GETPC());               \
+        }                                                               \
+    }
+
+DO_VST4B(vst40b, 0, 1, 10, 11)
+DO_VST4B(vst41b, 2, 3, 12, 13)
+DO_VST4B(vst42b, 4, 5, 14, 15)
+DO_VST4B(vst43b, 6, 7, 8, 9)
+
+DO_VST4H(vst40h, 0, 5)
+DO_VST4H(vst41h, 1, 6)
+DO_VST4H(vst42h, 2, 7)
+DO_VST4H(vst43h, 3, 4)
+
+DO_VST4W(vst40w, 0, 1, 10, 11)
+DO_VST4W(vst41w, 2, 3, 12, 13)
+DO_VST4W(vst42w, 4, 5, 14, 15)
+DO_VST4W(vst43w, 6, 7, 8, 9)
+
+#define DO_VST2B(OP, O1, O2, O3, O4)                                    \
+    void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx,             \
+                          uint32_t base)                                \
+    {                                                                   \
+        int beat, e;                                                    \
+        uint16_t mask = mve_eci_mask(env);                              \
+        static const uint8_t off[4] = { O1, O2, O3, O4 };               \
+        uint32_t addr, data;                                            \
+        uint8_t *qd;                                                    \
+        for (beat = 0; beat < 4; beat++, mask >>= 4) {                  \
+            if ((mask & 1) == 0) {                                      \
+                /* ECI says skip this beat */                           \
+                continue;                                               \
+            }                                                           \
+            addr = base + off[beat] * 2;                                \
+            data = 0;                                                   \
+            for (e = 3; e >= 0; e--) {                                  \
+                qd = (uint8_t *)aa32_vfp_qreg(env, qnidx + (e & 1));    \
+                data = (data << 8) | qd[H1(off[beat] + (e >> 1))];      \
+            }                                                           \
+            cpu_stl_le_data_ra(env, addr, data, GETPC());               \
+        }                                                               \
+    }
+
+#define DO_VST2H(OP, O1, O2, O3, O4)                                    \
+    void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx,             \
+                          uint32_t base)                                \
+    {                                                                   \
+        int beat;                                                       \
+        uint16_t mask = mve_eci_mask(env);                              \
+        static const uint8_t off[4] = { O1, O2, O3, O4 };               \
+        uint32_t addr, data;                                            \
+        int e;                                                          \
+        uint16_t *qd;                                                   \
+        for (beat = 0; beat < 4; beat++, mask >>= 4) {                  \
+            if ((mask & 1) == 0) {                                      \
+                /* ECI says skip this beat */                           \
+                continue;                                               \
+            }                                                           \
+            addr = base + off[beat] * 4;                                \
+            data = 0;                                                   \
+            for (e = 1; e >= 0; e--) {                                  \
+                qd = (uint16_t *)aa32_vfp_qreg(env, qnidx + e);         \
+                data = (data << 16) | qd[H2(off[beat])];                \
+            }                                                           \
+            cpu_stl_le_data_ra(env, addr, data, GETPC());               \
+        }                                                               \
+    }
+
+#define DO_VST2W(OP, O1, O2, O3, O4)                                    \
+    void HELPER(mve_##OP)(CPUARMState *env, uint32_t qnidx,             \
+                          uint32_t base)                                \
+    {                                                                   \
+        int beat;                                                       \
+        uint16_t mask = mve_eci_mask(env);                              \
+        static const uint8_t off[4] = { O1, O2, O3, O4 };               \
+        uint32_t addr, data;                                            \
+        uint32_t *qd;                                                   \
+        for (beat = 0; beat < 4; beat++, mask >>= 4) {                  \
+            if ((mask & 1) == 0) {                                      \
+                /* ECI says skip this beat */                           \
+                continue;                                               \
+            }                                                           \
+            addr = base + off[beat];                                    \
+            qd = (uint32_t *)aa32_vfp_qreg(env, qnidx + (beat & 1));    \
+            data = qd[H4(off[beat] >> 3)];                              \
+            cpu_stl_le_data_ra(env, addr, data, GETPC());               \
+        }                                                               \
+    }
+
+DO_VST2B(vst20b, 0, 2, 12, 14)
+DO_VST2B(vst21b, 4, 6, 8, 10)
+
+DO_VST2H(vst20h, 0, 1, 6, 7)
+DO_VST2H(vst21h, 2, 3, 4, 5)
+
+DO_VST2W(vst20w, 0, 4, 24, 28)
+DO_VST2W(vst21w, 8, 12, 16, 20)
+
 /*
  * The mergemask(D, R, M) macro performs the operation "*D = R" but
  * storing only the bytes which correspond to 1 bits in M,
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index d3cb3396863..78229c44c68 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -35,6 +35,7 @@ static inline int vidup_imm(DisasContext *s, int x)
 
 typedef void MVEGenLdStFn(TCGv_ptr, TCGv_ptr, TCGv_i32);
 typedef void MVEGenLdStSGFn(TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_i32);
+typedef void MVEGenLdStIlFn(TCGv_ptr, TCGv_i32, TCGv_i32);
 typedef void MVEGenOneOpFn(TCGv_ptr, TCGv_ptr, TCGv_ptr);
 typedef void MVEGenTwoOpFn(TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_ptr);
 typedef void MVEGenTwoOpScalarFn(TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_i32);
@@ -378,6 +379,99 @@ static bool trans_VSTRD_sg_imm(DisasContext *s, arg_vldst_sg_imm *a)
     return do_ldst_sg_imm(s, a, fns[a->w], MO_64);
 }
 
+static bool do_vldst_il(DisasContext *s, arg_vldst_il *a, MVEGenLdStIlFn *fn,
+                        int addrinc)
+{
+    TCGv_i32 rn;
+
+    if (!dc_isar_feature(aa32_mve, s) ||
+        !mve_check_qreg_bank(s, a->qd) ||
+        !fn || (a->rn == 13 && a->w) || a->rn == 15) {
+        /* Variously UNPREDICTABLE or UNDEF or related-encoding */
+        return false;
+    }
+    if (!mve_eci_check(s) || !vfp_access_check(s)) {
+        return true;
+    }
+
+    rn = load_reg(s, a->rn);
+    /*
+     * We pass the index of Qd, not a pointer, because the helper must
+     * access multiple Q registers starting at Qd and working up.
+     */
+    fn(cpu_env, tcg_constant_i32(a->qd), rn);
+
+    if (a->w) {
+        tcg_gen_addi_i32(rn, rn, addrinc);
+        store_reg(s, a->rn, rn);
+    } else {
+        tcg_temp_free_i32(rn);
+    }
+    mve_update_and_store_eci(s);
+    return true;
+}
+
+/* This macro is just to make the arrays more compact in these functions */
+#define F(N) gen_helper_mve_##N
+
+static bool trans_VLD2(DisasContext *s, arg_vldst_il *a)
+{
+    static MVEGenLdStIlFn * const fns[4][4] = {
+        { F(vld20b), F(vld20h), F(vld20w), NULL, },
+        { F(vld21b), F(vld21h), F(vld21w), NULL, },
+        { NULL, NULL, NULL, NULL },
+        { NULL, NULL, NULL, NULL },
+    };
+    if (a->qd > 6) {
+        return false;
+    }
+    return do_vldst_il(s, a, fns[a->pat][a->size], 32);
+}
+
+static bool trans_VLD4(DisasContext *s, arg_vldst_il *a)
+{
+    static MVEGenLdStIlFn * const fns[4][4] = {
+        { F(vld40b), F(vld40h), F(vld40w), NULL, },
+        { F(vld41b), F(vld41h), F(vld41w), NULL, },
+        { F(vld42b), F(vld42h), F(vld42w), NULL, },
+        { F(vld43b), F(vld43h), F(vld43w), NULL, },
+    };
+    if (a->qd > 4) {
+        return false;
+    }
+    return do_vldst_il(s, a, fns[a->pat][a->size], 64);
+}
+
+static bool trans_VST2(DisasContext *s, arg_vldst_il *a)
+{
+    static MVEGenLdStIlFn * const fns[4][4] = {
+        { F(vst20b), F(vst20h), F(vst20w), NULL, },
+        { F(vst21b), F(vst21h), F(vst21w), NULL, },
+        { NULL, NULL, NULL, NULL },
+        { NULL, NULL, NULL, NULL },
+    };
+    if (a->qd > 6) {
+        return false;
+    }
+    return do_vldst_il(s, a, fns[a->pat][a->size], 32);
+}
+
+static bool trans_VST4(DisasContext *s, arg_vldst_il *a)
+{
+    static MVEGenLdStIlFn * const fns[4][4] = {
+        { F(vst40b), F(vst40h), F(vst40w), NULL, },
+        { F(vst41b), F(vst41h), F(vst41w), NULL, },
+        { F(vst42b), F(vst42h), F(vst42w), NULL, },
+        { F(vst43b), F(vst43h), F(vst43w), NULL, },
+    };
+    if (a->qd > 4) {
+        return false;
+    }
+    return do_vldst_il(s, a, fns[a->pat][a->size], 64);
+}
+
+#undef F
+
 static bool trans_VDUP(DisasContext *s, arg_VDUP *a)
 {
     TCGv_ptr qd;
-- 
2.20.1

[PULL 36/44] target/arm: Re-indent sdiv and udiv helpers

[Peter Maydell]

We're about to make a code change to the sdiv and udiv helper
functions, so first fix their indentation and coding style.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210730151636.17254-2-peter.maydell@linaro.org
---
 target/arm/helper.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index 155d8bf2399..8e9c2a2cf8c 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -9355,17 +9355,20 @@ uint32_t HELPER(uxtb16)(uint32_t x)
 
 int32_t HELPER(sdiv)(int32_t num, int32_t den)
 {
-    if (den == 0)
-      return 0;
-    if (num == INT_MIN && den == -1)
-      return INT_MIN;
+    if (den == 0) {
+        return 0;
+    }
+    if (num == INT_MIN && den == -1) {
+        return INT_MIN;
+    }
     return num / den;
 }
 
 uint32_t HELPER(udiv)(uint32_t num, uint32_t den)
 {
-    if (den == 0)
-      return 0;
+    if (den == 0) {
+        return 0;
+    }
     return num / den;
 }
 
-- 
2.20.1

[PULL 37/44] target/arm: Implement M-profile trapping on division by zero

[Peter Maydell]

Unlike A-profile, for M-profile the UDIV and SDIV insns can be
configured to raise an exception on division by zero, using the CCR
DIV_0_TRP bit.

Implement support for setting this bit by making the helper functions
raise the appropriate exception.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210730151636.17254-3-peter.maydell@linaro.org
---
 target/arm/cpu.h       |  1 +
 target/arm/helper.h    |  4 ++--
 target/arm/helper.c    | 19 +++++++++++++++++--
 target/arm/m_helper.c  |  4 ++++
 target/arm/translate.c |  4 ++--
 5 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 9f0a5f84d50..5cf8996ae3c 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -54,6 +54,7 @@
 #define EXCP_LAZYFP         20   /* v7M fault during lazy FP stacking */
 #define EXCP_LSERR          21   /* v8M LSERR SecureFault */
 #define EXCP_UNALIGNED      22   /* v7M UNALIGNED UsageFault */
+#define EXCP_DIVBYZERO      23   /* v7M DIVBYZERO UsageFault */
 /* NB: add new EXCP_ defines to the array in arm_log_exception() too */
 
 #define ARMV7M_EXCP_RESET   1
diff --git a/target/arm/helper.h b/target/arm/helper.h
index 248569b0cd8..aee8f0019b4 100644
--- a/target/arm/helper.h
+++ b/target/arm/helper.h
@@ -6,8 +6,8 @@ DEF_HELPER_3(add_saturate, i32, env, i32, i32)
 DEF_HELPER_3(sub_saturate, i32, env, i32, i32)
 DEF_HELPER_3(add_usaturate, i32, env, i32, i32)
 DEF_HELPER_3(sub_usaturate, i32, env, i32, i32)
-DEF_HELPER_FLAGS_2(sdiv, TCG_CALL_NO_RWG_SE, s32, s32, s32)
-DEF_HELPER_FLAGS_2(udiv, TCG_CALL_NO_RWG_SE, i32, i32, i32)
+DEF_HELPER_FLAGS_3(sdiv, TCG_CALL_NO_RWG, s32, env, s32, s32)
+DEF_HELPER_FLAGS_3(udiv, TCG_CALL_NO_RWG, i32, env, i32, i32)
 DEF_HELPER_FLAGS_1(rbit, TCG_CALL_NO_RWG_SE, i32, i32)
 
 #define PAS_OP(pfx)  \
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 8e9c2a2cf8c..56c520cf8e9 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -9345,6 +9345,18 @@ uint32_t HELPER(sxtb16)(uint32_t x)
     return res;
 }
 
+static void handle_possible_div0_trap(CPUARMState *env, uintptr_t ra)
+{
+    /*
+     * Take a division-by-zero exception if necessary; otherwise return
+     * to get the usual non-trapping division behaviour (result of 0)
+     */
+    if (arm_feature(env, ARM_FEATURE_M)
+        && (env->v7m.ccr[env->v7m.secure] & R_V7M_CCR_DIV_0_TRP_MASK)) {
+        raise_exception_ra(env, EXCP_DIVBYZERO, 0, 1, ra);
+    }
+}
+
 uint32_t HELPER(uxtb16)(uint32_t x)
 {
     uint32_t res;
@@ -9353,9 +9365,10 @@ uint32_t HELPER(uxtb16)(uint32_t x)
     return res;
 }
 
-int32_t HELPER(sdiv)(int32_t num, int32_t den)
+int32_t HELPER(sdiv)(CPUARMState *env, int32_t num, int32_t den)
 {
     if (den == 0) {
+        handle_possible_div0_trap(env, GETPC());
         return 0;
     }
     if (num == INT_MIN && den == -1) {
@@ -9364,9 +9377,10 @@ int32_t HELPER(sdiv)(int32_t num, int32_t den)
     return num / den;
 }
 
-uint32_t HELPER(udiv)(uint32_t num, uint32_t den)
+uint32_t HELPER(udiv)(CPUARMState *env, uint32_t num, uint32_t den)
 {
     if (den == 0) {
+        handle_possible_div0_trap(env, GETPC());
         return 0;
     }
     return num / den;
@@ -9567,6 +9581,7 @@ void arm_log_exception(int idx)
             [EXCP_LAZYFP] = "v7M exception during lazy FP stacking",
             [EXCP_LSERR] = "v8M LSERR UsageFault",
             [EXCP_UNALIGNED] = "v7M UNALIGNED UsageFault",
+            [EXCP_DIVBYZERO] = "v7M DIVBYZERO UsageFault",
         };
 
         if (idx >= 0 && idx < ARRAY_SIZE(excnames)) {
diff --git a/target/arm/m_helper.c b/target/arm/m_helper.c
index 20761c94877..47903b3dc35 100644
--- a/target/arm/m_helper.c
+++ b/target/arm/m_helper.c
@@ -2252,6 +2252,10 @@ void arm_v7m_cpu_do_interrupt(CPUState *cs)
         armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE, env->v7m.secure);
         env->v7m.cfsr[env->v7m.secure] |= R_V7M_CFSR_UNALIGNED_MASK;
         break;
+    case EXCP_DIVBYZERO:
+        armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE, env->v7m.secure);
+        env->v7m.cfsr[env->v7m.secure] |= R_V7M_CFSR_DIVBYZERO_MASK;
+        break;
     case EXCP_SWI:
         /* The PC already points to the next instruction.  */
         armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SVC, env->v7m.secure);
diff --git a/target/arm/translate.c b/target/arm/translate.c
index 804a53279bd..115aa768b6a 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -7992,9 +7992,9 @@ static bool op_div(DisasContext *s, arg_rrr *a, bool u)
     t1 = load_reg(s, a->rn);
     t2 = load_reg(s, a->rm);
     if (u) {
-        gen_helper_udiv(t1, t1, t2);
+        gen_helper_udiv(t1, cpu_env, t1, t2);
     } else {
-        gen_helper_sdiv(t1, t1, t2);
+        gen_helper_sdiv(t1, cpu_env, t1, t2);
     }
     tcg_temp_free_i32(t2);
     store_reg(s, a->rd, t1);
-- 
2.20.1

[PULL 38/44] target/arm: kvm: use RCU_READ_LOCK_GUARD() in kvm_arch_fixup_msi_route()

[Peter Maydell]

From: Hamza Mahfooz <someguy@effective-light.com>

As per commit 5626f8c6d468 ("rcu: Add automatically released rcu_read_lock
variants"), RCU_READ_LOCK_GUARD() should be used instead of
rcu_read_{un}lock().

Signed-off-by: Hamza Mahfooz <someguy@effective-light.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 20210727235201.11491-1-someguy@effective-light.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/kvm.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index d8381ba2245..5d55de1a493 100644
--- a/target/arm/kvm.c
+++ b/target/arm/kvm.c
@@ -998,7 +998,6 @@ int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
     hwaddr xlat, len, doorbell_gpa;
     MemoryRegionSection mrs;
     MemoryRegion *mr;
-    int ret = 1;
 
     if (as == &address_space_memory) {
         return 0;
@@ -1006,15 +1005,19 @@ int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
 
     /* MSI doorbell address is translated by an IOMMU */
 
-    rcu_read_lock();
+    RCU_READ_LOCK_GUARD();
+
     mr = address_space_translate(as, address, &xlat, &len, true,
                                  MEMTXATTRS_UNSPECIFIED);
+
     if (!mr) {
-        goto unlock;
+        return 1;
     }
+
     mrs = memory_region_find(mr, xlat, 1);
+
     if (!mrs.mr) {
-        goto unlock;
+        return 1;
     }
 
     doorbell_gpa = mrs.offset_within_address_space;
@@ -1025,11 +1028,7 @@ int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
 
     trace_kvm_arm_fixup_msi_route(address, doorbell_gpa);
 
-    ret = 0;
-
-unlock:
-    rcu_read_unlock();
-    return ret;
+    return 0;
 }
 
 int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route,
-- 
2.20.1

[PULL 39/44] hw/char/pl011: add support for sending break

[Peter Maydell]

From: Jan Luebbe <jlu@pengutronix.de>

Break events are currently only handled by chardev/char-serial.c, so we
just ignore errors, which results in no behaviour change for other
chardevs.

Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Message-id: 20210806144700.3751979-1-jlu@pengutronix.de
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/char/pl011.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/char/pl011.c b/hw/char/pl011.c
index dc85527a5f9..6e2d7f75095 100644
--- a/hw/char/pl011.c
+++ b/hw/char/pl011.c
@@ -26,6 +26,7 @@
 #include "hw/qdev-properties-system.h"
 #include "migration/vmstate.h"
 #include "chardev/char-fe.h"
+#include "chardev/char-serial.h"
 #include "qemu/log.h"
 #include "qemu/module.h"
 #include "trace.h"
@@ -231,6 +232,11 @@ static void pl011_write(void *opaque, hwaddr offset,
             s->read_count = 0;
             s->read_pos = 0;
         }
+        if ((s->lcr ^ value) & 0x1) {
+            int break_enable = value & 0x1;
+            qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_SERIAL_SET_BREAK,
+                              &break_enable);
+        }
         s->lcr = value;
         pl011_set_read_trigger(s);
         break;
-- 
2.20.1

[PULL 40/44] fsl-imx6ul: Instantiate SAI1/2/3 and ASRC as unimplemented devices

[Peter Maydell]

From: Guenter Roeck <linux@roeck-us.net>

Instantiate SAI1/2/3 and ASRC as unimplemented devices to avoid random
Linux kernel crashes, such as

Unhandled fault: external abort on non-linefetch (0x808) at 0xd1580010
pgd = (ptrval)
[d1580010] *pgd=8231b811, *pte=02034653, *ppte=02034453
Internal error: : 808 [#1] SMP ARM
...
[<c095e974>] (regmap_mmio_write32le) from [<c095eb48>] (regmap_mmio_write+0x3c/0x54)
[<c095eb48>] (regmap_mmio_write) from [<c09580f4>] (_regmap_write+0x4c/0x1f0)
[<c09580f4>] (_regmap_write) from [<c095837c>] (_regmap_update_bits+0xe4/0xec)
[<c095837c>] (_regmap_update_bits) from [<c09599b4>] (regmap_update_bits_base+0x50/0x74)
[<c09599b4>] (regmap_update_bits_base) from [<c0d3e9e4>] (fsl_asrc_runtime_resume+0x1e4/0x21c)
[<c0d3e9e4>] (fsl_asrc_runtime_resume) from [<c0942464>] (__rpm_callback+0x3c/0x108)
[<c0942464>] (__rpm_callback) from [<c0942590>] (rpm_callback+0x60/0x64)
[<c0942590>] (rpm_callback) from [<c0942b60>] (rpm_resume+0x5cc/0x808)
[<c0942b60>] (rpm_resume) from [<c0942dfc>] (__pm_runtime_resume+0x60/0xa0)
[<c0942dfc>] (__pm_runtime_resume) from [<c0d3ecc4>] (fsl_asrc_probe+0x2a8/0x708)
[<c0d3ecc4>] (fsl_asrc_probe) from [<c0935b08>] (platform_probe+0x58/0xb8)
[<c0935b08>] (platform_probe) from [<c0933264>] (really_probe.part.0+0x9c/0x334)
[<c0933264>] (really_probe.part.0) from [<c093359c>] (__driver_probe_device+0xa0/0x138)
[<c093359c>] (__driver_probe_device) from [<c0933664>] (driver_probe_device+0x30/0xc8)
[<c0933664>] (driver_probe_device) from [<c0933c88>] (__driver_attach+0x90/0x130)
[<c0933c88>] (__driver_attach) from [<c0931060>] (bus_for_each_dev+0x78/0xb8)
[<c0931060>] (bus_for_each_dev) from [<c093254c>] (bus_add_driver+0xf0/0x1d8)
[<c093254c>] (bus_add_driver) from [<c0934a30>] (driver_register+0x88/0x118)
[<c0934a30>] (driver_register) from [<c01022c0>] (do_one_initcall+0x7c/0x3a4)
[<c01022c0>] (do_one_initcall) from [<c1601204>] (kernel_init_freeable+0x198/0x22c)
[<c1601204>] (kernel_init_freeable) from [<c0f5ff2c>] (kernel_init+0x10/0x128)
[<c0f5ff2c>] (kernel_init) from [<c010013c>] (ret_from_fork+0x14/0x38)

or

Unhandled fault: external abort on non-linefetch (0x808) at 0xd19b0000
pgd = (ptrval)
[d19b0000] *pgd=82711811, *pte=308a0653, *ppte=308a0453
Internal error: : 808 [#1] SMP ARM
...
[<c095e974>] (regmap_mmio_write32le) from [<c095eb48>] (regmap_mmio_write+0x3c/0x54)
[<c095eb48>] (regmap_mmio_write) from [<c09580f4>] (_regmap_write+0x4c/0x1f0)
[<c09580f4>] (_regmap_write) from [<c0959b28>] (regmap_write+0x3c/0x60)
[<c0959b28>] (regmap_write) from [<c0d41130>] (fsl_sai_runtime_resume+0x9c/0x1ec)
[<c0d41130>] (fsl_sai_runtime_resume) from [<c0942464>] (__rpm_callback+0x3c/0x108)
[<c0942464>] (__rpm_callback) from [<c0942590>] (rpm_callback+0x60/0x64)
[<c0942590>] (rpm_callback) from [<c0942b60>] (rpm_resume+0x5cc/0x808)
[<c0942b60>] (rpm_resume) from [<c0942dfc>] (__pm_runtime_resume+0x60/0xa0)
[<c0942dfc>] (__pm_runtime_resume) from [<c0d4231c>] (fsl_sai_probe+0x2b8/0x65c)
[<c0d4231c>] (fsl_sai_probe) from [<c0935b08>] (platform_probe+0x58/0xb8)
[<c0935b08>] (platform_probe) from [<c0933264>] (really_probe.part.0+0x9c/0x334)
[<c0933264>] (really_probe.part.0) from [<c093359c>] (__driver_probe_device+0xa0/0x138)
[<c093359c>] (__driver_probe_device) from [<c0933664>] (driver_probe_device+0x30/0xc8)
[<c0933664>] (driver_probe_device) from [<c0933c88>] (__driver_attach+0x90/0x130)
[<c0933c88>] (__driver_attach) from [<c0931060>] (bus_for_each_dev+0x78/0xb8)
[<c0931060>] (bus_for_each_dev) from [<c093254c>] (bus_add_driver+0xf0/0x1d8)
[<c093254c>] (bus_add_driver) from [<c0934a30>] (driver_register+0x88/0x118)
[<c0934a30>] (driver_register) from [<c01022c0>] (do_one_initcall+0x7c/0x3a4)
[<c01022c0>] (do_one_initcall) from [<c1601204>] (kernel_init_freeable+0x198/0x22c)
[<c1601204>] (kernel_init_freeable) from [<c0f5ff2c>] (kernel_init+0x10/0x128)
[<c0f5ff2c>] (kernel_init) from [<c010013c>] (ret_from_fork+0x14/0x38)

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Message-id: 20210810160318.87376-1-linux@roeck-us.net
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/arm/fsl-imx6ul.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/hw/arm/fsl-imx6ul.c b/hw/arm/fsl-imx6ul.c
index e0128d73161..1d1a708dd97 100644
--- a/hw/arm/fsl-imx6ul.c
+++ b/hw/arm/fsl-imx6ul.c
@@ -534,6 +534,13 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
      */
     create_unimplemented_device("sdma", FSL_IMX6UL_SDMA_ADDR, 0x4000);
 
+    /*
+     * SAI (Audio SSI (Synchronous Serial Interface))
+     */
+    create_unimplemented_device("sai1", FSL_IMX6UL_SAI1_ADDR, 0x4000);
+    create_unimplemented_device("sai2", FSL_IMX6UL_SAI2_ADDR, 0x4000);
+    create_unimplemented_device("sai3", FSL_IMX6UL_SAI3_ADDR, 0x4000);
+
     /*
      * PWM
      */
@@ -542,6 +549,11 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
     create_unimplemented_device("pwm3", FSL_IMX6UL_PWM3_ADDR, 0x4000);
     create_unimplemented_device("pwm4", FSL_IMX6UL_PWM4_ADDR, 0x4000);
 
+    /*
+     * Audio ASRC (asynchronous sample rate converter)
+     */
+    create_unimplemented_device("asrc", FSL_IMX6UL_ASRC_ADDR, 0x4000);
+
     /*
      * CAN
      */
-- 
2.20.1

[PULL 41/44] hw/dma/pl330: Add memory region to replace default

[Peter Maydell]

From: "Wen, Jianxian" <Jianxian.Wen@verisilicon.com>

Add property memory region which can connect with IOMMU region to support SMMU translate.

Signed-off-by: Jianxian Wen <jianxian.wen@verisilicon.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 4C23C17B8E87E74E906A25A3254A03F4FA1FEC31@SHASXM03.verisilicon.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/arm/exynos4210.c  |  3 +++
 hw/arm/xilinx_zynq.c |  3 +++
 hw/dma/pl330.c       | 26 ++++++++++++++++++++++----
 3 files changed, 28 insertions(+), 4 deletions(-)

diff --git a/hw/arm/exynos4210.c b/hw/arm/exynos4210.c
index 5c7a51bbad7..0299e81f853 100644
--- a/hw/arm/exynos4210.c
+++ b/hw/arm/exynos4210.c
@@ -173,6 +173,9 @@ static DeviceState *pl330_create(uint32_t base, qemu_or_irq *orgate,
     int i;
 
     dev = qdev_new("pl330");
+    object_property_set_link(OBJECT(dev), "memory",
+                             OBJECT(get_system_memory()),
+                             &error_fatal);
     qdev_prop_set_uint8(dev, "num_events", nevents);
     qdev_prop_set_uint8(dev, "num_chnls",  8);
     qdev_prop_set_uint8(dev, "num_periph_req",  nreq);
diff --git a/hw/arm/xilinx_zynq.c b/hw/arm/xilinx_zynq.c
index 245af81bbb7..69c333e91b1 100644
--- a/hw/arm/xilinx_zynq.c
+++ b/hw/arm/xilinx_zynq.c
@@ -312,6 +312,9 @@ static void zynq_init(MachineState *machine)
     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, pic[39-IRQ_OFFSET]);
 
     dev = qdev_new("pl330");
+    object_property_set_link(OBJECT(dev), "memory",
+                             OBJECT(address_space_mem),
+                             &error_fatal);
     qdev_prop_set_uint8(dev, "num_chnls",  8);
     qdev_prop_set_uint8(dev, "num_periph_req",  4);
     qdev_prop_set_uint8(dev, "num_events",  16);
diff --git a/hw/dma/pl330.c b/hw/dma/pl330.c
index 944ba296b08..0cb46191c19 100644
--- a/hw/dma/pl330.c
+++ b/hw/dma/pl330.c
@@ -269,6 +269,9 @@ struct PL330State {
     uint8_t num_faulting;
     uint8_t periph_busy[PL330_PERIPH_NUM];
 
+    /* Memory region that DMA operation access */
+    MemoryRegion *mem_mr;
+    AddressSpace *mem_as;
 };
 
 #define TYPE_PL330 "pl330"
@@ -1108,7 +1111,7 @@ static inline const PL330InsnDesc *pl330_fetch_insn(PL330Chan *ch)
     uint8_t opcode;
     int i;
 
-    dma_memory_read(&address_space_memory, ch->pc, &opcode, 1);
+    dma_memory_read(ch->parent->mem_as, ch->pc, &opcode, 1);
     for (i = 0; insn_desc[i].size; i++) {
         if ((opcode & insn_desc[i].opmask) == insn_desc[i].opcode) {
             return &insn_desc[i];
@@ -1122,7 +1125,7 @@ static inline void pl330_exec_insn(PL330Chan *ch, const PL330InsnDesc *insn)
     uint8_t buf[PL330_INSN_MAXSIZE];
 
     assert(insn->size <= PL330_INSN_MAXSIZE);
-    dma_memory_read(&address_space_memory, ch->pc, buf, insn->size);
+    dma_memory_read(ch->parent->mem_as, ch->pc, buf, insn->size);
     insn->exec(ch, buf[0], &buf[1], insn->size - 1);
 }
 
@@ -1186,7 +1189,7 @@ static int pl330_exec_cycle(PL330Chan *channel)
     if (q != NULL && q->len <= pl330_fifo_num_free(&s->fifo)) {
         int len = q->len - (q->addr & (q->len - 1));
 
-        dma_memory_read(&address_space_memory, q->addr, buf, len);
+        dma_memory_read(s->mem_as, q->addr, buf, len);
         trace_pl330_exec_cycle(q->addr, len);
         if (trace_event_get_state_backends(TRACE_PL330_HEXDUMP)) {
             pl330_hexdump(buf, len);
@@ -1217,7 +1220,7 @@ static int pl330_exec_cycle(PL330Chan *channel)
             fifo_res = pl330_fifo_get(&s->fifo, buf, len, q->tag);
         }
         if (fifo_res == PL330_FIFO_OK || q->z) {
-            dma_memory_write(&address_space_memory, q->addr, buf, len);
+            dma_memory_write(s->mem_as, q->addr, buf, len);
             trace_pl330_exec_cycle(q->addr, len);
             if (trace_event_get_state_backends(TRACE_PL330_HEXDUMP)) {
                 pl330_hexdump(buf, len);
@@ -1562,6 +1565,18 @@ static void pl330_realize(DeviceState *dev, Error **errp)
                           "dma", PL330_IOMEM_SIZE);
     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->iomem);
 
+    if (!s->mem_mr) {
+        error_setg(errp, "'memory' link is not set");
+        return;
+    } else if (s->mem_mr == get_system_memory()) {
+        /* Avoid creating new AS for system memory. */
+        s->mem_as = &address_space_memory;
+    } else {
+        s->mem_as = g_new0(AddressSpace, 1);
+        address_space_init(s->mem_as, s->mem_mr,
+                           memory_region_name(s->mem_mr));
+    }
+
     s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, pl330_exec_cycle_timer, s);
 
     s->cfg[0] = (s->mgr_ns_at_rst ? 0x4 : 0) |
@@ -1656,6 +1671,9 @@ static Property pl330_properties[] = {
     DEFINE_PROP_UINT8("rd_q_dep", PL330State, rd_q_dep, 16),
     DEFINE_PROP_UINT16("data_buffer_dep", PL330State, data_buffer_dep, 256),
 
+    DEFINE_PROP_LINK("memory", PL330State, mem_mr,
+                     TYPE_MEMORY_REGION, MemoryRegion *),
+
     DEFINE_PROP_END_OF_LIST(),
 };
 
-- 
2.20.1

[PULL 42/44] sbsa-ref: Rename SBSA_GWDT enum value

[Peter Maydell]

From: Eduardo Habkost <ehabkost@redhat.com>

The SBSA_GWDT enum value conflicts with the SBSA_GWDT() QOM type
checking helper, preventing us from using a OBJECT_DEFINE* or
DEFINE_INSTANCE_CHECKER macro for the SBSA_GWDT() wrapper.

If I understand the SBSA 6.0 specification correctly, the signal
being connected to IRQ 16 is the WS0 output signal from the
Generic Watchdog.  Rename the enum value to SBSA_GWDT_WS0 to be
more explicit and avoid the name conflict.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-id: 20210806023119.431680-1-ehabkost@redhat.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/arm/sbsa-ref.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/hw/arm/sbsa-ref.c b/hw/arm/sbsa-ref.c
index c1629df6031..509c5f09b4e 100644
--- a/hw/arm/sbsa-ref.c
+++ b/hw/arm/sbsa-ref.c
@@ -65,7 +65,7 @@ enum {
     SBSA_GIC_DIST,
     SBSA_GIC_REDIST,
     SBSA_SECURE_EC,
-    SBSA_GWDT,
+    SBSA_GWDT_WS0,
     SBSA_GWDT_REFRESH,
     SBSA_GWDT_CONTROL,
     SBSA_SMMU,
@@ -140,7 +140,7 @@ static const int sbsa_ref_irqmap[] = {
     [SBSA_AHCI] = 10,
     [SBSA_EHCI] = 11,
     [SBSA_SMMU] = 12, /* ... to 15 */
-    [SBSA_GWDT] = 16,
+    [SBSA_GWDT_WS0] = 16,
 };
 
 static const char * const valid_cpus[] = {
@@ -481,7 +481,7 @@ static void create_wdt(const SBSAMachineState *sms)
     hwaddr cbase = sbsa_ref_memmap[SBSA_GWDT_CONTROL].base;
     DeviceState *dev = qdev_new(TYPE_WDT_SBSA);
     SysBusDevice *s = SYS_BUS_DEVICE(dev);
-    int irq = sbsa_ref_irqmap[SBSA_GWDT];
+    int irq = sbsa_ref_irqmap[SBSA_GWDT_WS0];
 
     sysbus_realize_and_unref(s, &error_fatal);
     sysbus_mmio_map(s, 0, rbase);
-- 
2.20.1

[PULL 43/44] fsl-imx7: Instantiate SAI1/2/3 as unimplemented devices

[Peter Maydell]

From: Guenter Roeck <linux@roeck-us.net>

Instantiate SAI1/2/3 as unimplemented devices to avoid Linux kernel crashes
such as the following.

Unhandled fault: external abort on non-linefetch (0x808) at 0xd19b0000
pgd = (ptrval)
[d19b0000] *pgd=82711811, *pte=308a0653, *ppte=308a0453
Internal error: : 808 [#1] SMP ARM
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.14.0-rc5 #1
...
[<c095e974>] (regmap_mmio_write32le) from [<c095eb48>] (regmap_mmio_write+0x3c/0x54)
[<c095eb48>] (regmap_mmio_write) from [<c09580f4>] (_regmap_write+0x4c/0x1f0)
[<c09580f4>] (_regmap_write) from [<c0959b28>] (regmap_write+0x3c/0x60)
[<c0959b28>] (regmap_write) from [<c0d41130>] (fsl_sai_runtime_resume+0x9c/0x1ec)
[<c0d41130>] (fsl_sai_runtime_resume) from [<c0942464>] (__rpm_callback+0x3c/0x108)
[<c0942464>] (__rpm_callback) from [<c0942590>] (rpm_callback+0x60/0x64)
[<c0942590>] (rpm_callback) from [<c0942b60>] (rpm_resume+0x5cc/0x808)
[<c0942b60>] (rpm_resume) from [<c0942dfc>] (__pm_runtime_resume+0x60/0xa0)
[<c0942dfc>] (__pm_runtime_resume) from [<c0d4231c>] (fsl_sai_probe+0x2b8/0x65c)
[<c0d4231c>] (fsl_sai_probe) from [<c0935b08>] (platform_probe+0x58/0xb8)
[<c0935b08>] (platform_probe) from [<c0933264>] (really_probe.part.0+0x9c/0x334)
[<c0933264>] (really_probe.part.0) from [<c093359c>] (__driver_probe_device+0xa0/0x138)
[<c093359c>] (__driver_probe_device) from [<c0933664>] (driver_probe_device+0x30/0xc8)
[<c0933664>] (driver_probe_device) from [<c0933c88>] (__driver_attach+0x90/0x130)
[<c0933c88>] (__driver_attach) from [<c0931060>] (bus_for_each_dev+0x78/0xb8)
[<c0931060>] (bus_for_each_dev) from [<c093254c>] (bus_add_driver+0xf0/0x1d8)
[<c093254c>] (bus_add_driver) from [<c0934a30>] (driver_register+0x88/0x118)
[<c0934a30>] (driver_register) from [<c01022c0>] (do_one_initcall+0x7c/0x3a4)
[<c01022c0>] (do_one_initcall) from [<c1601204>] (kernel_init_freeable+0x198/0x22c)
[<c1601204>] (kernel_init_freeable) from [<c0f5ff2c>] (kernel_init+0x10/0x128)
[<c0f5ff2c>] (kernel_init) from [<c010013c>] (ret_from_fork+0x14/0x38)

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Message-id: 20210810175607.538090-1-linux@roeck-us.net
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 include/hw/arm/fsl-imx7.h | 5 +++++
 hw/arm/fsl-imx7.c         | 7 +++++++
 2 files changed, 12 insertions(+)

diff --git a/include/hw/arm/fsl-imx7.h b/include/hw/arm/fsl-imx7.h
index f5d527a4906..1c5fa6fd676 100644
--- a/include/hw/arm/fsl-imx7.h
+++ b/include/hw/arm/fsl-imx7.h
@@ -174,6 +174,11 @@ enum FslIMX7MemoryMap {
     FSL_IMX7_UART6_ADDR           = 0x30A80000,
     FSL_IMX7_UART7_ADDR           = 0x30A90000,
 
+    FSL_IMX7_SAI1_ADDR            = 0x308A0000,
+    FSL_IMX7_SAI2_ADDR            = 0x308B0000,
+    FSL_IMX7_SAI3_ADDR            = 0x308C0000,
+    FSL_IMX7_SAIn_SIZE            = 0x10000,
+
     FSL_IMX7_ENET1_ADDR           = 0x30BE0000,
     FSL_IMX7_ENET2_ADDR           = 0x30BF0000,
 
diff --git a/hw/arm/fsl-imx7.c b/hw/arm/fsl-imx7.c
index 2ff2cab9246..149885f2b80 100644
--- a/hw/arm/fsl-imx7.c
+++ b/hw/arm/fsl-imx7.c
@@ -467,6 +467,13 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
     create_unimplemented_device("can1", FSL_IMX7_CAN1_ADDR, FSL_IMX7_CANn_SIZE);
     create_unimplemented_device("can2", FSL_IMX7_CAN2_ADDR, FSL_IMX7_CANn_SIZE);
 
+    /*
+     * SAI (Audio SSI (Synchronous Serial Interface))
+     */
+    create_unimplemented_device("sai1", FSL_IMX7_SAI1_ADDR, FSL_IMX7_SAIn_SIZE);
+    create_unimplemented_device("sai2", FSL_IMX7_SAI2_ADDR, FSL_IMX7_SAIn_SIZE);
+    create_unimplemented_device("sai2", FSL_IMX7_SAI3_ADDR, FSL_IMX7_SAIn_SIZE);
+
     /*
      * OCOTP
      */
-- 
2.20.1

[PULL 44/44] docs: Document how to use gdb with unix sockets

[Peter Maydell]

From: Sebastian Meyer <meyer@absint.com>

With gdb 9.0 and better it is possible to connect to a gdbstub
over unix sockets, which is better than a TCP socket connection
in some situations. The QEMU command line to set this up is
non-obvious; document it.

Signed-off-by: Sebastian Meyer <meyer@absint.com>
Message-id: 162867284829.27377.4784930719350564918-0@git.sr.ht
[PMM: Tweaked commit message; adjusted wording in a couple of
places; fixed rST formatting issue; moved section up out of
the 'advanced debugging options' subsection]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 docs/system/gdb.rst | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/docs/system/gdb.rst b/docs/system/gdb.rst
index 144d083df31..bdb42dae2fe 100644
--- a/docs/system/gdb.rst
+++ b/docs/system/gdb.rst
@@ -15,7 +15,8 @@ The ``-s`` option will make QEMU listen for an incoming connection
 from gdb on TCP port 1234, and ``-S`` will make QEMU not start the
 guest until you tell it to from gdb. (If you want to specify which
 TCP port to use or to use something other than TCP for the gdbstub
-connection, use the ``-gdb dev`` option instead of ``-s``.)
+connection, use the ``-gdb dev`` option instead of ``-s``. See
+`Using unix sockets`_ for an example.)
 
 .. parsed-literal::
 
@@ -100,6 +101,29 @@ not just those in the cluster you are currently working on::
 
   (gdb) set schedule-multiple on
 
+Using unix sockets
+==================
+
+An alternate method for connecting gdb to the QEMU gdbstub is to use
+a unix socket (if supported by your operating system). This is useful when
+running several tests in parallel, or if you do not have a known free TCP
+port (e.g. when running automated tests).
+
+First create a chardev with the appropriate options, then
+instruct the gdbserver to use that device:
+
+.. parsed-literal::
+
+   |qemu_system| -chardev socket,path=/tmp/gdb-socket,server=on,wait=off,id=gdb0 -gdb chardev:gdb0 -S ...
+
+Start gdb as before, but this time connect using the path to
+the socket::
+
+   (gdb) target remote /tmp/gdb-socket
+
+Note that to use a unix socket for the connection you will need
+gdb version 9.0 or newer.
+
 Advanced debugging options
 ==========================
 
-- 
2.20.1

Re: [PULL 00/44] target-arm queue

[Peter Maydell]

On Wed, 25 Aug 2021 at 11:35, Peter Maydell <peter.maydell@linaro.org> wrote:
>
> First set of arm patches for 6.2. I have a lot more in my
> to-review queue still...
>
> -- PMM
>
> The following changes since commit d42685765653ec155fdf60910662f8830bdb2cef:
>
>   Open 6.2 development tree (2021-08-25 10:25:12 +0100)
>
> are available in the Git repository at:
>
>   https://git.linaro.org/people/pmaydell/qemu-arm.git tags/pull-target-arm-20210825
>
> for you to fetch changes up to 24b1a6aa43615be22c7ee66bd68ec5675f6a6a9a:
>
>   docs: Document how to use gdb with unix sockets (2021-08-25 10:48:51 +0100)
>
> ----------------------------------------------------------------
> target-arm queue:
>  * More MVE emulation work
>  * Implement M-profile trapping on division by zero
>  * kvm: use RCU_READ_LOCK_GUARD() in kvm_arch_fixup_msi_route()
>  * hw/char/pl011: add support for sending break
>  * fsl-imx6ul: Instantiate SAI1/2/3 and ASRC as unimplemented devices
>  * hw/dma/pl330: Add memory region to replace default
>  * sbsa-ref: Rename SBSA_GWDT enum value
>  * fsl-imx7: Instantiate SAI1/2/3 as unimplemented devices
>  * docs: Document how to use gdb with unix sockets


Applied, thanks.

Please update the changelog at https://wiki.qemu.org/ChangeLog/6.2
for any user-visible changes.

-- PMM