[Qemu-devel] [PULL 00/42] target-arm queue

[Qemu-devel] [PULL 00/42] target-arm queue

[Peter Maydell]

Arm queue -- I have more stuff pending but I prefer to push
this first lot out and keep the pull below 50 patches.
Most of this is Alex's FP16 support work.

-- PMM


The following changes since commit 6697439794f72b3501ee16bb95d16854f9981421:

  Merge remote-tracking branch 'remotes/kraxel/tags/usb-20180227-pull-request' into staging (2018-02-27 17:50:46 +0000)

are available in the Git repository at:

  git://git.linaro.org/people/pmaydell/qemu-arm.git tags/pull-target-arm-20180301

for you to fetch changes up to c22e580c2ad1cccef582e1490e732f254d4ac064:

  MAINTAINERS: Update my email address (2018-03-01 11:13:59 +0000)

----------------------------------------------------------------
target-arm queue:
 * update MAINTAINERS for Alistair's new email address
 * add Arm v8.2 FP16 arithmetic extension for linux-user
 * implement display connector emulation for vexpress board
 * xilinx_spips: Enable only two slaves when reading/writing with stripe
 * xilinx_spips: Use 8 dummy cycles with the QIOR/QIOR4 commands
 * hw: register: Run post_write hook on reset

----------------------------------------------------------------
Alex Bennée (31):
      include/exec/helper-head.h: support f16 in helper calls
      target/arm/cpu64: introduce ARM_V8_FP16 feature bit
      target/arm/cpu.h: update comment for half-precision values
      target/arm/cpu.h: add additional float_status flags
      target/arm/helper: pass explicit fpst to set_rmode
      arm/translate-a64: implement half-precision F(MIN|MAX)(V|NMV)
      arm/translate-a64: handle_3same_64 comment fix
      arm/translate-a64: initial decode for simd_three_reg_same_fp16
      arm/translate-a64: add FP16 FADD/FABD/FSUB/FMUL/FDIV to simd_three_reg_same_fp16
      arm/translate-a64: add FP16 F[A]C[EQ/GE/GT] to simd_three_reg_same_fp16
      arm/translate-a64: add FP16 FMULA/X/S to simd_three_reg_same_fp16
      arm/translate-a64: add FP16 FR[ECP/SQRT]S to simd_three_reg_same_fp16
      arm/translate-a64: add FP16 pairwise ops simd_three_reg_same_fp16
      arm/translate-a64: add FP16 FMULX/MLS/FMLA to simd_indexed
      arm/translate-a64: add FP16 x2 ops for simd_indexed
      arm/translate-a64: initial decode for simd_two_reg_misc_fp16
      arm/translate-a64: add FP16 FPRINTx to simd_two_reg_misc_fp16
      arm/translate-a64: add FCVTxx to simd_two_reg_misc_fp16
      arm/translate-a64: add FP16 FCMxx (zero) to simd_two_reg_misc_fp16
      arm/translate-a64: add FP16 SCVTF/UCVFT to simd_two_reg_misc_fp16
      arm/translate-a64: add FP16 FNEG/FABS to simd_two_reg_misc_fp16
      arm/helper.c: re-factor recpe and add recepe_f16
      arm/translate-a64: add FP16 FRECPE
      arm/translate-a64: add FP16 FRCPX to simd_two_reg_misc_fp16
      arm/translate-a64: add FP16 FSQRT to simd_two_reg_misc_fp16
      arm/helper.c: re-factor rsqrte and add rsqrte_f16
      arm/translate-a64: add FP16 FRSQRTE to simd_two_reg_misc_fp16
      arm/translate-a64: add FP16 FMOV to simd_mod_imm
      arm/translate-a64: add all FP16 ops in simd_scalar_pairwise
      arm/translate-a64: implement simd_scalar_three_reg_same_fp16
      arm/translate-a64: add all single op FP16 to handle_fp_1src_half

Alistair Francis (2):
      hw: register: Run post_write hook on reset
      MAINTAINERS: Update my email address

Corey Minyard (2):
      i2c: Fix some brace style issues
      i2c: Move the bus class to i2c.h

Francisco Iglesias (2):
      xilinx_spips: Enable only two slaves when reading/writing with stripe
      xilinx_spips: Use 8 dummy cycles with the QIOR/QIOR4 commands

Linus Walleij (3):
      hw/i2c-ddc: Do not fail writes
      hw/sii9022: Add support for Silicon Image SII9022
      arm/vexpress: Add proper display connector emulation

Peter Maydell (2):
      target/arm: Enable ARM_V8_FP16 feature bit for the AArch64 "any" CPU
      linux-user: Report AArch64 FP16 support via hwcap bits

 hw/display/Makefile.objs        |    1 +
 include/exec/helper-head.h      |    3 +
 include/fpu/softfloat.h         |   18 +-
 include/hw/i2c/i2c.h            |   23 +-
 include/hw/register.h           |    6 +-
 target/arm/cpu.h                |   34 +-
 target/arm/helper-a64.h         |   33 +
 target/arm/helper.h             |   14 +-
 hw/arm/vexpress.c               |    6 +-
 hw/core/register.c              |    8 +
 hw/display/sii9022.c            |  191 ++++++
 hw/i2c/core.c                   |   18 -
 hw/i2c/i2c-ddc.c                |    4 +-
 hw/ssi/xilinx_spips.c           |   43 +-
 linux-user/elfload.c            |    2 +
 target/arm/cpu64.c              |    1 +
 target/arm/helper-a64.c         |  269 +++++++++
 target/arm/helper.c             |  481 ++++++++-------
 target/arm/translate-a64.c      | 1266 +++++++++++++++++++++++++++++++++------
 target/arm/translate.c          |   12 +-
 MAINTAINERS                     |   12 +-
 default-configs/arm-softmmu.mak |    2 +
 hw/display/trace-events         |    5 +
 23 files changed, 1981 insertions(+), 471 deletions(-)
 create mode 100644 hw/display/sii9022.c

[Qemu-devel] [PULL 01/42] hw: register: Run post_write hook on reset

[Peter Maydell]

From: Alistair Francis <alistair.francis@xilinx.com>

Ensure that the post write hook is called during reset. This allows us
to rely on the post write functions instead of having to call them from
the reset() function.

Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: d131e24b911653a945e46ca2d8f90f572469e1dd.1517856214.git.alistair.francis@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 include/hw/register.h | 6 +++---
 hw/core/register.c    | 8 ++++++++
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/include/hw/register.h b/include/hw/register.h
index de2414e6b4..5796584588 100644
--- a/include/hw/register.h
+++ b/include/hw/register.h
@@ -34,7 +34,7 @@ typedef struct RegisterInfoArray RegisterInfoArray;
  * immediately before the actual write. The returned value is what is written,
  * giving the handler a chance to modify the written value.
  * @post_write: Post write callback. Passed the written value. Most write side
- * effects should be implemented here.
+ * effects should be implemented here. This is called during device reset.
  *
  * @post_read: Post read callback. Passes the value that is about to be returned
  * for a read. The return value from this function is what is ultimately read,
@@ -135,8 +135,8 @@ uint64_t register_read(RegisterInfo *reg, uint64_t re, const char* prefix,
                        bool debug);
 
 /**
- * reset a register
- * @reg: register to reset
+ * Resets a register. This will also call the post_write hook if it exists.
+ * @reg: The register to reset.
  */
 
 void register_reset(RegisterInfo *reg);
diff --git a/hw/core/register.c b/hw/core/register.c
index 900294b9c4..0741a1af32 100644
--- a/hw/core/register.c
+++ b/hw/core/register.c
@@ -159,13 +159,21 @@ uint64_t register_read(RegisterInfo *reg, uint64_t re, const char* prefix,
 
 void register_reset(RegisterInfo *reg)
 {
+    const RegisterAccessInfo *ac;
+
     g_assert(reg);
 
     if (!reg->data || !reg->access) {
         return;
     }
 
+    ac = reg->access;
+
     register_write_val(reg, reg->access->reset);
+
+    if (ac->post_write) {
+        ac->post_write(reg, reg->access->reset);
+    }
 }
 
 void register_init(RegisterInfo *reg)
-- 
2.16.2

[Qemu-devel] [PULL 02/42] xilinx_spips: Enable only two slaves when reading/writing with stripe

[Peter Maydell]

From: Francisco Iglesias <frasse.iglesias@gmail.com>

Assert only the lower cs on bus 0 and upper cs on bus 1 when both buses and
chip selects are enabled (e.g reading/writing with stripe).

Signed-off-by: Francisco Iglesias <frasse.iglesias@gmail.com>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Tested-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: 20180223232233.31482-2-frasse.iglesias@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/ssi/xilinx_spips.c | 41 +++++++++++++++++++++++++++++++++++++----
 1 file changed, 37 insertions(+), 4 deletions(-)

diff --git a/hw/ssi/xilinx_spips.c b/hw/ssi/xilinx_spips.c
index 8af36ca3d4..0cb484ecf4 100644
--- a/hw/ssi/xilinx_spips.c
+++ b/hw/ssi/xilinx_spips.c
@@ -223,7 +223,7 @@ static void xilinx_spips_update_cs(XilinxSPIPS *s, int field)
 {
     int i;
 
-    for (i = 0; i < s->num_cs; i++) {
+    for (i = 0; i < s->num_cs * s->num_busses; i++) {
         bool old_state = s->cs_lines_state[i];
         bool new_state = field & (1 << i);
 
@@ -234,7 +234,7 @@ static void xilinx_spips_update_cs(XilinxSPIPS *s, int field)
         }
         qemu_set_irq(s->cs_lines[i], !new_state);
     }
-    if (!(field & ((1 << s->num_cs) - 1))) {
+    if (!(field & ((1 << (s->num_cs * s->num_busses)) - 1))) {
         s->snoop_state = SNOOP_CHECKING;
         s->cmd_dummies = 0;
         s->link_state = 1;
@@ -248,7 +248,40 @@ static void xlnx_zynqmp_qspips_update_cs_lines(XlnxZynqMPQSPIPS *s)
 {
     if (s->regs[R_GQSPI_GF_SNAPSHOT]) {
         int field = ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, CHIP_SELECT);
-        xilinx_spips_update_cs(XILINX_SPIPS(s), field);
+        bool upper_cs_sel = field & (1 << 1);
+        bool lower_cs_sel = field & 1;
+        bool bus0_enabled;
+        bool bus1_enabled;
+        uint8_t buses;
+        int cs = 0;
+
+        buses = ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, DATA_BUS_SELECT);
+        bus0_enabled = buses & 1;
+        bus1_enabled = buses & (1 << 1);
+
+        if (bus0_enabled && bus1_enabled) {
+            if (lower_cs_sel) {
+                cs |= 1;
+            }
+            if (upper_cs_sel) {
+                cs |= 1 << 3;
+            }
+        } else if (bus0_enabled) {
+            if (lower_cs_sel) {
+                cs |= 1;
+            }
+            if (upper_cs_sel) {
+                cs |= 1 << 1;
+            }
+        } else if (bus1_enabled) {
+            if (lower_cs_sel) {
+                cs |= 1 << 2;
+            }
+            if (upper_cs_sel) {
+                cs |= 1 << 3;
+            }
+        }
+        xilinx_spips_update_cs(XILINX_SPIPS(s), cs);
     }
 }
 
@@ -260,7 +293,7 @@ static void xilinx_spips_update_cs_lines(XilinxSPIPS *s)
     if (num_effective_busses(s) == 2) {
         /* Single bit chip-select for qspi */
         field &= 0x1;
-        field |= field << 1;
+        field |= field << 3;
     /* Dual stack U-Page */
     } else if (s->regs[R_LQSPI_CFG] & LQSPI_CFG_TWO_MEM &&
                s->regs[R_LQSPI_STS] & LQSPI_CFG_U_PAGE) {
-- 
2.16.2

[Qemu-devel] [PULL 03/42] xilinx_spips: Use 8 dummy cycles with the QIOR/QIOR4 commands

[Peter Maydell]

From: Francisco Iglesias <frasse.iglesias@gmail.com>

Use 8 dummy cycles (4 dummy bytes) with the QIOR/QIOR4 commands in legacy mode
for matching what is expected by Micron (Numonyx) flashes (the default target
flash type of the QSPI).

Signed-off-by: Francisco Iglesias <frasse.iglesias@gmail.com>
Tested-by: Alistair Francis <alistair.francis@xilinx.com>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: 20180223232233.31482-3-frasse.iglesias@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/ssi/xilinx_spips.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/ssi/xilinx_spips.c b/hw/ssi/xilinx_spips.c
index 0cb484ecf4..426f971311 100644
--- a/hw/ssi/xilinx_spips.c
+++ b/hw/ssi/xilinx_spips.c
@@ -577,7 +577,7 @@ static int xilinx_spips_num_dummies(XilinxQSPIPS *qs, uint8_t command)
         return 2;
     case QIOR:
     case QIOR_4:
-        return 5;
+        return 4;
     default:
         return -1;
     }
-- 
2.16.2

[Qemu-devel] [PULL 04/42] i2c: Fix some brace style issues

[Peter Maydell]

From: Corey Minyard <cminyard@mvista.com>

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Message-id: 20180227104903.21353-2-linus.walleij@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 include/hw/i2c/i2c.h | 6 ++----
 hw/i2c/core.c        | 3 +--
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/include/hw/i2c/i2c.h b/include/hw/i2c/i2c.h
index 24e95d0155..8fd449f645 100644
--- a/include/hw/i2c/i2c.h
+++ b/include/hw/i2c/i2c.h
@@ -25,8 +25,7 @@ typedef struct I2CSlave I2CSlave;
 #define I2C_SLAVE_GET_CLASS(obj) \
      OBJECT_GET_CLASS(I2CSlaveClass, (obj), TYPE_I2C_SLAVE)
 
-typedef struct I2CSlaveClass
-{
+typedef struct I2CSlaveClass {
     DeviceClass parent_class;
 
     /* Callbacks provided by the device.  */
@@ -50,8 +49,7 @@ typedef struct I2CSlaveClass
     int (*event)(I2CSlave *s, enum i2c_event event);
 } I2CSlaveClass;
 
-struct I2CSlave
-{
+struct I2CSlave {
     DeviceState qdev;
 
     /* Remaining fields for internal use by the I2C code.  */
diff --git a/hw/i2c/core.c b/hw/i2c/core.c
index 59068f157e..9a54b61c1d 100644
--- a/hw/i2c/core.c
+++ b/hw/i2c/core.c
@@ -19,8 +19,7 @@ struct I2CNode {
 
 #define I2C_BROADCAST 0x00
 
-struct I2CBus
-{
+struct I2CBus {
     BusState qbus;
     QLIST_HEAD(, I2CNode) current_devs;
     uint8_t saved_address;
-- 
2.16.2

[Qemu-devel] [PULL 05/42] i2c: Move the bus class to i2c.h

[Peter Maydell]

From: Corey Minyard <cminyard@mvista.com>

Some devices need access to it.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Message-id: 20180227104903.21353-3-linus.walleij@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 include/hw/i2c/i2c.h | 17 +++++++++++++++++
 hw/i2c/core.c        | 17 -----------------
 2 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/include/hw/i2c/i2c.h b/include/hw/i2c/i2c.h
index 8fd449f645..d727379b48 100644
--- a/include/hw/i2c/i2c.h
+++ b/include/hw/i2c/i2c.h
@@ -56,6 +56,23 @@ struct I2CSlave {
     uint8_t address;
 };
 
+#define TYPE_I2C_BUS "i2c-bus"
+#define I2C_BUS(obj) OBJECT_CHECK(I2CBus, (obj), TYPE_I2C_BUS)
+
+typedef struct I2CNode I2CNode;
+
+struct I2CNode {
+    I2CSlave *elt;
+    QLIST_ENTRY(I2CNode) next;
+};
+
+struct I2CBus {
+    BusState qbus;
+    QLIST_HEAD(, I2CNode) current_devs;
+    uint8_t saved_address;
+    bool broadcast;
+};
+
 I2CBus *i2c_init_bus(DeviceState *parent, const char *name);
 void i2c_set_slave_address(I2CSlave *dev, uint8_t address);
 int i2c_bus_busy(I2CBus *bus);
diff --git a/hw/i2c/core.c b/hw/i2c/core.c
index 9a54b61c1d..cfccefca3d 100644
--- a/hw/i2c/core.c
+++ b/hw/i2c/core.c
@@ -10,30 +10,13 @@
 #include "qemu/osdep.h"
 #include "hw/i2c/i2c.h"
 
-typedef struct I2CNode I2CNode;
-
-struct I2CNode {
-    I2CSlave *elt;
-    QLIST_ENTRY(I2CNode) next;
-};
-
 #define I2C_BROADCAST 0x00
 
-struct I2CBus {
-    BusState qbus;
-    QLIST_HEAD(, I2CNode) current_devs;
-    uint8_t saved_address;
-    bool broadcast;
-};
-
 static Property i2c_props[] = {
     DEFINE_PROP_UINT8("address", struct I2CSlave, address, 0),
     DEFINE_PROP_END_OF_LIST(),
 };
 
-#define TYPE_I2C_BUS "i2c-bus"
-#define I2C_BUS(obj) OBJECT_CHECK(I2CBus, (obj), TYPE_I2C_BUS)
-
 static const TypeInfo i2c_bus_info = {
     .name = TYPE_I2C_BUS,
     .parent = TYPE_BUS,
-- 
2.16.2

[Qemu-devel] [PULL 06/42] hw/i2c-ddc: Do not fail writes

[Peter Maydell]

From: Linus Walleij <linus.walleij@linaro.org>

The tx function of the DDC I2C slave emulation was returning 1
on all writes resulting in NACK in the I2C bus. Changing it to
0 makes the DDC I2C work fine with bit-banged I2C such as the
versatile I2C.

I guess it was not affecting whatever I2C controller this was
used with until now, but with the Versatile I2C it surely
does not work.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Message-id: 20180227104903.21353-4-linus.walleij@linaro.org
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/i2c/i2c-ddc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/i2c/i2c-ddc.c b/hw/i2c/i2c-ddc.c
index 199dac9e41..bec0c91e2d 100644
--- a/hw/i2c/i2c-ddc.c
+++ b/hw/i2c/i2c-ddc.c
@@ -259,12 +259,12 @@ static int i2c_ddc_tx(I2CSlave *i2c, uint8_t data)
         s->reg = data;
         s->firstbyte = false;
         DPRINTF("[EDID] Written new pointer: %u\n", data);
-        return 1;
+        return 0;
     }
 
     /* Ignore all writes */
     s->reg++;
-    return 1;
+    return 0;
 }
 
 static void i2c_ddc_init(Object *obj)
-- 
2.16.2

[Qemu-devel] [PULL 07/42] hw/sii9022: Add support for Silicon Image SII9022

[Peter Maydell]

From: Linus Walleij <linus.walleij@linaro.org>

This adds support for emulating the Silicon Image SII9022 DVI/HDMI
bridge. It's not very clever right now, it just acknowledges
the switch into DDC I2C mode and back. Combining this with the
existing DDC I2C emulation gives the right behavior on the Versatile
Express emulation passing through the QEMU EDID to the emulated
platform.

Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Message-id: 20180227104903.21353-5-linus.walleij@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
[PMM: explictly reset ddc_req/ddc_skip_finish/ddc]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/display/Makefile.objs |   1 +
 hw/display/sii9022.c     | 191 +++++++++++++++++++++++++++++++++++++++++++++++
 hw/display/trace-events  |   5 ++
 3 files changed, 197 insertions(+)
 create mode 100644 hw/display/sii9022.c

diff --git a/hw/display/Makefile.objs b/hw/display/Makefile.objs
index d3a4cb396e..3c7c75b94d 100644
--- a/hw/display/Makefile.objs
+++ b/hw/display/Makefile.objs
@@ -3,6 +3,7 @@ common-obj-$(CONFIG_VGA_CIRRUS) += cirrus_vga.o
 common-obj-$(CONFIG_G364FB) += g364fb.o
 common-obj-$(CONFIG_JAZZ_LED) += jazz_led.o
 common-obj-$(CONFIG_PL110) += pl110.o
+common-obj-$(CONFIG_SII9022) += sii9022.o
 common-obj-$(CONFIG_SSD0303) += ssd0303.o
 common-obj-$(CONFIG_SSD0323) += ssd0323.o
 common-obj-$(CONFIG_XEN) += xenfb.o
diff --git a/hw/display/sii9022.c b/hw/display/sii9022.c
new file mode 100644
index 0000000000..eaf11a6e7b
--- /dev/null
+++ b/hw/display/sii9022.c
@@ -0,0 +1,191 @@
+/*
+ * Silicon Image SiI9022
+ *
+ * This is a pretty hollow emulation: all we do is acknowledge that we
+ * exist (chip ID) and confirm that we get switched over into DDC mode
+ * so the emulated host can proceed to read out EDID data. All subsequent
+ * set-up of connectors etc will be acknowledged and ignored.
+ *
+ * Copyright (C) 2018 Linus Walleij
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "hw/i2c/i2c.h"
+#include "hw/i2c/i2c-ddc.h"
+#include "trace.h"
+
+#define SII9022_SYS_CTRL_DATA 0x1a
+#define SII9022_SYS_CTRL_PWR_DWN 0x10
+#define SII9022_SYS_CTRL_AV_MUTE 0x08
+#define SII9022_SYS_CTRL_DDC_BUS_REQ 0x04
+#define SII9022_SYS_CTRL_DDC_BUS_GRTD 0x02
+#define SII9022_SYS_CTRL_OUTPUT_MODE 0x01
+#define SII9022_SYS_CTRL_OUTPUT_HDMI 1
+#define SII9022_SYS_CTRL_OUTPUT_DVI 0
+#define SII9022_REG_CHIPID 0x1b
+#define SII9022_INT_ENABLE 0x3c
+#define SII9022_INT_STATUS 0x3d
+#define SII9022_INT_STATUS_HOTPLUG 0x01;
+#define SII9022_INT_STATUS_PLUGGED 0x04;
+
+#define TYPE_SII9022 "sii9022"
+#define SII9022(obj) OBJECT_CHECK(sii9022_state, (obj), TYPE_SII9022)
+
+typedef struct sii9022_state {
+    I2CSlave parent_obj;
+    uint8_t ptr;
+    bool addr_byte;
+    bool ddc_req;
+    bool ddc_skip_finish;
+    bool ddc;
+} sii9022_state;
+
+static const VMStateDescription vmstate_sii9022 = {
+    .name = "sii9022",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_I2C_SLAVE(parent_obj, sii9022_state),
+        VMSTATE_UINT8(ptr, sii9022_state),
+        VMSTATE_BOOL(addr_byte, sii9022_state),
+        VMSTATE_BOOL(ddc_req, sii9022_state),
+        VMSTATE_BOOL(ddc_skip_finish, sii9022_state),
+        VMSTATE_BOOL(ddc, sii9022_state),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static int sii9022_event(I2CSlave *i2c, enum i2c_event event)
+{
+    sii9022_state *s = SII9022(i2c);
+
+    switch (event) {
+    case I2C_START_SEND:
+        s->addr_byte = true;
+        break;
+    case I2C_START_RECV:
+        break;
+    case I2C_FINISH:
+        break;
+    case I2C_NACK:
+        break;
+    }
+
+    return 0;
+}
+
+static int sii9022_rx(I2CSlave *i2c)
+{
+    sii9022_state *s = SII9022(i2c);
+    uint8_t res = 0x00;
+
+    switch (s->ptr) {
+    case SII9022_SYS_CTRL_DATA:
+        if (s->ddc_req) {
+            /* Acknowledge DDC bus request */
+            res = SII9022_SYS_CTRL_DDC_BUS_GRTD | SII9022_SYS_CTRL_DDC_BUS_REQ;
+        }
+        break;
+    case SII9022_REG_CHIPID:
+        res = 0xb0;
+        break;
+    case SII9022_INT_STATUS:
+        /* Something is cold-plugged in, no interrupts */
+        res = SII9022_INT_STATUS_PLUGGED;
+        break;
+    default:
+        break;
+    }
+
+    trace_sii9022_read_reg(s->ptr, res);
+    s->ptr++;
+
+    return res;
+}
+
+static int sii9022_tx(I2CSlave *i2c, uint8_t data)
+{
+    sii9022_state *s = SII9022(i2c);
+
+    if (s->addr_byte) {
+        s->ptr = data;
+        s->addr_byte = false;
+        return 0;
+    }
+
+    switch (s->ptr) {
+    case SII9022_SYS_CTRL_DATA:
+        if (data & SII9022_SYS_CTRL_DDC_BUS_REQ) {
+            s->ddc_req = true;
+            if (data & SII9022_SYS_CTRL_DDC_BUS_GRTD) {
+                s->ddc = true;
+                /* Skip this finish since we just switched to DDC */
+                s->ddc_skip_finish = true;
+                trace_sii9022_switch_mode("DDC");
+            }
+        } else {
+            s->ddc_req = false;
+            s->ddc = false;
+            trace_sii9022_switch_mode("normal");
+        }
+        break;
+    default:
+        break;
+    }
+
+    trace_sii9022_write_reg(s->ptr, data);
+    s->ptr++;
+
+    return 0;
+}
+
+static void sii9022_reset(DeviceState *dev)
+{
+    sii9022_state *s = SII9022(dev);
+
+    s->ptr = 0;
+    s->addr_byte = false;
+    s->ddc_req = false;
+    s->ddc_skip_finish = false;
+    s->ddc = false;
+}
+
+static void sii9022_realize(DeviceState *dev, Error **errp)
+{
+    I2CBus *bus;
+
+    bus = I2C_BUS(qdev_get_parent_bus(dev));
+    i2c_create_slave(bus, TYPE_I2CDDC, 0x50);
+}
+
+static void sii9022_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
+
+    k->event = sii9022_event;
+    k->recv = sii9022_rx;
+    k->send = sii9022_tx;
+    dc->reset = sii9022_reset;
+    dc->realize = sii9022_realize;
+    dc->vmsd = &vmstate_sii9022;
+}
+
+static const TypeInfo sii9022_info = {
+    .name          = TYPE_SII9022,
+    .parent        = TYPE_I2C_SLAVE,
+    .instance_size = sizeof(sii9022_state),
+    .class_init    = sii9022_class_init,
+};
+
+static void sii9022_register_types(void)
+{
+    type_register_static(&sii9022_info);
+}
+
+type_init(sii9022_register_types)
diff --git a/hw/display/trace-events b/hw/display/trace-events
index da498c1def..5a48c6cb6a 100644
--- a/hw/display/trace-events
+++ b/hw/display/trace-events
@@ -132,3 +132,8 @@ vga_cirrus_read_io(uint32_t addr, uint32_t val) "addr 0x%x, val 0x%x"
 vga_cirrus_write_io(uint32_t addr, uint32_t val) "addr 0x%x, val 0x%x"
 vga_cirrus_read_blt(uint32_t offset, uint32_t val) "offset 0x%x, val 0x%x"
 vga_cirrus_write_blt(uint32_t offset, uint32_t val) "offset 0x%x, val 0x%x"
+
+# hw/display/sii9022.c
+sii9022_read_reg(uint8_t addr, uint8_t val) "addr 0x%02x, val 0x%02x"
+sii9022_write_reg(uint8_t addr, uint8_t val) "addr 0x%02x, val 0x%02x"
+sii9022_switch_mode(const char *mode) "mode: %s"
-- 
2.16.2

[Qemu-devel] [PULL 08/42] arm/vexpress: Add proper display connector emulation

[Peter Maydell]

From: Linus Walleij <linus.walleij@linaro.org>

This adds the SiI9022 (and implicitly EDID I2C) device to the ARM
Versatile Express machine, and selects the two I2C devices necessary
in the arm-softmmu.mak configuration so everything will build
smoothly.

I am implementing proper handling of the graphics in the Linux
kernel and adding proper emulation of SiI9022 and EDID makes the
driver probe as nicely as before, retrieving the resolutions
supported by the "QEMU monitor" and overall just working nice.

Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Message-id: 20180227104903.21353-6-linus.walleij@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/arm/vexpress.c               | 6 +++++-
 default-configs/arm-softmmu.mak | 2 ++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/hw/arm/vexpress.c b/hw/arm/vexpress.c
index dc5928ae1a..9fad79177a 100644
--- a/hw/arm/vexpress.c
+++ b/hw/arm/vexpress.c
@@ -29,6 +29,7 @@
 #include "hw/arm/arm.h"
 #include "hw/arm/primecell.h"
 #include "hw/devices.h"
+#include "hw/i2c/i2c.h"
 #include "net/net.h"
 #include "sysemu/sysemu.h"
 #include "hw/boards.h"
@@ -537,6 +538,7 @@ static void vexpress_common_init(MachineState *machine)
     uint32_t sys_id;
     DriveInfo *dinfo;
     pflash_t *pflash0;
+    I2CBus *i2c;
     ram_addr_t vram_size, sram_size;
     MemoryRegion *sysmem = get_system_memory();
     MemoryRegion *vram = g_new(MemoryRegion, 1);
@@ -628,7 +630,9 @@ static void vexpress_common_init(MachineState *machine)
     sysbus_create_simple("sp804", map[VE_TIMER01], pic[2]);
     sysbus_create_simple("sp804", map[VE_TIMER23], pic[3]);
 
-    /* VE_SERIALDVI: not modelled */
+    dev = sysbus_create_simple("versatile_i2c", map[VE_SERIALDVI], NULL);
+    i2c = (I2CBus *)qdev_get_child_bus(dev, "i2c");
+    i2c_create_slave(i2c, "sii9022", 0x39);
 
     sysbus_create_simple("pl031", map[VE_RTC], pic[4]); /* RTC */
 
diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
index ca34cf4462..54f855d072 100644
--- a/default-configs/arm-softmmu.mak
+++ b/default-configs/arm-softmmu.mak
@@ -21,6 +21,8 @@ CONFIG_STELLARIS_INPUT=y
 CONFIG_STELLARIS_ENET=y
 CONFIG_SSD0303=y
 CONFIG_SSD0323=y
+CONFIG_DDC=y
+CONFIG_SII9022=y
 CONFIG_ADS7846=y
 CONFIG_MAX111X=y
 CONFIG_SSI=y
-- 
2.16.2

[Qemu-devel] [PULL 09/42] include/exec/helper-head.h: support f16 in helper calls

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

This allows us to explicitly pass float16 to helpers rather than
assuming uint32_t and dealing with the result. Of course they will be
passed in i32 sized registers by default.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-2-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 include/exec/helper-head.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/exec/helper-head.h b/include/exec/helper-head.h
index e1fd08f2ba..15b6a68de3 100644
--- a/include/exec/helper-head.h
+++ b/include/exec/helper-head.h
@@ -26,6 +26,7 @@
 #define dh_alias_int i32
 #define dh_alias_i64 i64
 #define dh_alias_s64 i64
+#define dh_alias_f16 i32
 #define dh_alias_f32 i32
 #define dh_alias_f64 i64
 #define dh_alias_ptr ptr
@@ -38,6 +39,7 @@
 #define dh_ctype_int int
 #define dh_ctype_i64 uint64_t
 #define dh_ctype_s64 int64_t
+#define dh_ctype_f16 float16
 #define dh_ctype_f32 float32
 #define dh_ctype_f64 float64
 #define dh_ctype_ptr void *
@@ -94,6 +96,7 @@
 #define dh_is_signed_s32 1
 #define dh_is_signed_i64 0
 #define dh_is_signed_s64 1
+#define dh_is_signed_f16 0
 #define dh_is_signed_f32 0
 #define dh_is_signed_f64 0
 #define dh_is_signed_tl  0
-- 
2.16.2

[Qemu-devel] [PULL 10/42] target/arm/cpu64: introduce ARM_V8_FP16 feature bit

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-3-alex.bennee@linaro.org
[PMM: postpone actually enabling feature until end of the
 patch series]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/cpu.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 8c839faa8f..267a9d7e2f 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1408,6 +1408,7 @@ enum arm_features {
     ARM_FEATURE_V8_SHA3, /* implements SHA3 part of v8 Crypto Extensions */
     ARM_FEATURE_V8_SM3, /* implements SM3 part of v8 Crypto Extensions */
     ARM_FEATURE_V8_SM4, /* implements SM4 part of v8 Crypto Extensions */
+    ARM_FEATURE_V8_FP16, /* implements v8.2 half-precision float */
 };
 
 static inline int arm_feature(CPUARMState *env, int feature)
-- 
2.16.2

[Qemu-devel] [PULL 11/42] target/arm/cpu.h: update comment for half-precision values

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-4-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/cpu.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 267a9d7e2f..25f31a4e21 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -168,6 +168,7 @@ typedef struct {
  *  Qn = regs[n].d[1]:regs[n].d[0]
  *  Dn = regs[n].d[0]
  *  Sn = regs[n].d[0] bits 31..0
+ *  Hn = regs[n].d[0] bits 15..0
  *
  * This corresponds to the architecturally defined mapping between
  * the two execution states, and means we do not need to explicitly
-- 
2.16.2

[Qemu-devel] [PULL 12/42] target/arm/cpu.h: add additional float_status flags

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

Half-precision flush to zero behaviour is controlled by a separate
FZ16 bit in the FPCR. To handle this we pass a pointer to
fp_status_fp16 when working on half-precision operations. The value of
the presented FPCR is calculated from an amalgam of the two when read.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-5-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/cpu.h           | 32 ++++++++++++++++++++++------
 target/arm/helper.c        | 26 ++++++++++++++++++-----
 target/arm/translate-a64.c | 53 +++++++++++++++++++++++++---------------------
 3 files changed, 75 insertions(+), 36 deletions(-)

diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 25f31a4e21..2b9740878b 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -538,19 +538,29 @@ typedef struct CPUARMState {
         /* scratch space when Tn are not sufficient.  */
         uint32_t scratch[8];
 
-        /* fp_status is the "normal" fp status. standard_fp_status retains
-         * values corresponding to the ARM "Standard FPSCR Value", ie
-         * default-NaN, flush-to-zero, round-to-nearest and is used by
-         * any operations (generally Neon) which the architecture defines
-         * as controlled by the standard FPSCR value rather than the FPSCR.
+        /* There are a number of distinct float control structures:
+         *
+         *  fp_status: is the "normal" fp status.
+         *  fp_status_fp16: used for half-precision calculations
+         *  standard_fp_status : the ARM "Standard FPSCR Value"
+         *
+         * Half-precision operations are governed by a separate
+         * flush-to-zero control bit in FPSCR:FZ16. We pass a separate
+         * status structure to control this.
+         *
+         * The "Standard FPSCR", ie default-NaN, flush-to-zero,
+         * round-to-nearest and is used by any operations (generally
+         * Neon) which the architecture defines as controlled by the
+         * standard FPSCR value rather than the FPSCR.
          *
          * To avoid having to transfer exception bits around, we simply
          * say that the FPSCR cumulative exception flags are the logical
-         * OR of the flags in the two fp statuses. This relies on the
+         * OR of the flags in the three fp statuses. This relies on the
          * only thing which needs to read the exception flags being
          * an explicit FPSCR read.
          */
         float_status fp_status;
+        float_status fp_status_f16;
         float_status standard_fp_status;
 
         /* ZCR_EL[1-3] */
@@ -1190,12 +1200,20 @@ static inline void xpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
 uint32_t vfp_get_fpscr(CPUARMState *env);
 void vfp_set_fpscr(CPUARMState *env, uint32_t val);
 
-/* For A64 the FPSCR is split into two logically distinct registers,
+/* FPCR, Floating Point Control Register
+ * FPSR, Floating Poiht Status Register
+ *
+ * For A64 the FPSCR is split into two logically distinct registers,
  * FPCR and FPSR. However since they still use non-overlapping bits
  * we store the underlying state in fpscr and just mask on read/write.
  */
 #define FPSR_MASK 0xf800009f
 #define FPCR_MASK 0x07f79f00
+
+#define FPCR_FZ16   (1 << 19)   /* ARMv8.2+, FP16 flush-to-zero */
+#define FPCR_FZ     (1 << 24)   /* Flush-to-zero enable bit */
+#define FPCR_DN     (1 << 25)   /* Default NaN enable bit */
+
 static inline uint32_t vfp_get_fpsr(CPUARMState *env)
 {
     return vfp_get_fpscr(env) & FPSR_MASK;
diff --git a/target/arm/helper.c b/target/arm/helper.c
index c5bc69b961..f450eb200f 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -11103,6 +11103,7 @@ uint32_t HELPER(vfp_get_fpscr)(CPUARMState *env)
             | (env->vfp.vec_stride << 20);
     i = get_float_exception_flags(&env->vfp.fp_status);
     i |= get_float_exception_flags(&env->vfp.standard_fp_status);
+    i |= get_float_exception_flags(&env->vfp.fp_status_f16);
     fpscr |= vfp_exceptbits_from_host(i);
     return fpscr;
 }
@@ -11160,16 +11161,31 @@ void HELPER(vfp_set_fpscr)(CPUARMState *env, uint32_t val)
             break;
         }
         set_float_rounding_mode(i, &env->vfp.fp_status);
+        set_float_rounding_mode(i, &env->vfp.fp_status_f16);
     }
-    if (changed & (1 << 24)) {
-        set_flush_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status);
-        set_flush_inputs_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status);
+    if (changed & FPCR_FZ16) {
+        bool ftz_enabled = val & FPCR_FZ16;
+        set_flush_to_zero(ftz_enabled, &env->vfp.fp_status_f16);
+        set_flush_inputs_to_zero(ftz_enabled, &env->vfp.fp_status_f16);
+    }
+    if (changed & FPCR_FZ) {
+        bool ftz_enabled = val & FPCR_FZ;
+        set_flush_to_zero(ftz_enabled, &env->vfp.fp_status);
+        set_flush_inputs_to_zero(ftz_enabled, &env->vfp.fp_status);
+    }
+    if (changed & FPCR_DN) {
+        bool dnan_enabled = val & FPCR_DN;
+        set_default_nan_mode(dnan_enabled, &env->vfp.fp_status);
+        set_default_nan_mode(dnan_enabled, &env->vfp.fp_status_f16);
     }
-    if (changed & (1 << 25))
-        set_default_nan_mode((val & (1 << 25)) != 0, &env->vfp.fp_status);
 
+    /* The exception flags are ORed together when we read fpscr so we
+     * only need to preserve the current state in one of our
+     * float_status values.
+     */
     i = vfp_exceptbits_to_host(val);
     set_float_exception_flags(i, &env->vfp.fp_status);
+    set_float_exception_flags(0, &env->vfp.fp_status_f16);
     set_float_exception_flags(0, &env->vfp.standard_fp_status);
 }
 
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 1c88539d62..2c64d2b3fe 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -637,16 +637,21 @@ static void write_fp_sreg(DisasContext *s, int reg, TCGv_i32 v)
     tcg_temp_free_i64(tmp);
 }
 
-static TCGv_ptr get_fpstatus_ptr(void)
+static TCGv_ptr get_fpstatus_ptr(bool is_f16)
 {
     TCGv_ptr statusptr = tcg_temp_new_ptr();
     int offset;
 
-    /* In A64 all instructions (both FP and Neon) use the FPCR;
-     * there is no equivalent of the A32 Neon "standard FPSCR value"
-     * and all operations use vfp.fp_status.
+    /* In A64 all instructions (both FP and Neon) use the FPCR; there
+     * is no equivalent of the A32 Neon "standard FPSCR value".
+     * However half-precision operations operate under a different
+     * FZ16 flag and use vfp.fp_status_f16 instead of vfp.fp_status.
      */
-    offset = offsetof(CPUARMState, vfp.fp_status);
+    if (is_f16) {
+        offset = offsetof(CPUARMState, vfp.fp_status_f16);
+    } else {
+        offset = offsetof(CPUARMState, vfp.fp_status);
+    }
     tcg_gen_addi_ptr(statusptr, cpu_env, offset);
     return statusptr;
 }
@@ -4423,7 +4428,7 @@ static void handle_fp_compare(DisasContext *s, bool is_double,
                               bool cmp_with_zero, bool signal_all_nans)
 {
     TCGv_i64 tcg_flags = tcg_temp_new_i64();
-    TCGv_ptr fpst = get_fpstatus_ptr();
+    TCGv_ptr fpst = get_fpstatus_ptr(false);
 
     if (is_double) {
         TCGv_i64 tcg_vn, tcg_vm;
@@ -4598,7 +4603,7 @@ static void handle_fp_1src_single(DisasContext *s, int opcode, int rd, int rn)
     TCGv_i32 tcg_op;
     TCGv_i32 tcg_res;
 
-    fpst = get_fpstatus_ptr();
+    fpst = get_fpstatus_ptr(false);
     tcg_op = read_fp_sreg(s, rn);
     tcg_res = tcg_temp_new_i32();
 
@@ -4660,7 +4665,7 @@ static void handle_fp_1src_double(DisasContext *s, int opcode, int rd, int rn)
         return;
     }
 
-    fpst = get_fpstatus_ptr();
+    fpst = get_fpstatus_ptr(false);
     tcg_op = read_fp_dreg(s, rn);
     tcg_res = tcg_temp_new_i64();
 
@@ -4840,7 +4845,7 @@ static void handle_fp_2src_single(DisasContext *s, int opcode,
     TCGv_ptr fpst;
 
     tcg_res = tcg_temp_new_i32();
-    fpst = get_fpstatus_ptr();
+    fpst = get_fpstatus_ptr(false);
     tcg_op1 = read_fp_sreg(s, rn);
     tcg_op2 = read_fp_sreg(s, rm);
 
@@ -4893,7 +4898,7 @@ static void handle_fp_2src_double(DisasContext *s, int opcode,
     TCGv_ptr fpst;
 
     tcg_res = tcg_temp_new_i64();
-    fpst = get_fpstatus_ptr();
+    fpst = get_fpstatus_ptr(false);
     tcg_op1 = read_fp_dreg(s, rn);
     tcg_op2 = read_fp_dreg(s, rm);
 
@@ -4979,7 +4984,7 @@ static void handle_fp_3src_single(DisasContext *s, bool o0, bool o1,
 {
     TCGv_i32 tcg_op1, tcg_op2, tcg_op3;
     TCGv_i32 tcg_res = tcg_temp_new_i32();
-    TCGv_ptr fpst = get_fpstatus_ptr();
+    TCGv_ptr fpst = get_fpstatus_ptr(false);
 
     tcg_op1 = read_fp_sreg(s, rn);
     tcg_op2 = read_fp_sreg(s, rm);
@@ -5017,7 +5022,7 @@ static void handle_fp_3src_double(DisasContext *s, bool o0, bool o1,
 {
     TCGv_i64 tcg_op1, tcg_op2, tcg_op3;
     TCGv_i64 tcg_res = tcg_temp_new_i64();
-    TCGv_ptr fpst = get_fpstatus_ptr();
+    TCGv_ptr fpst = get_fpstatus_ptr(false);
 
     tcg_op1 = read_fp_dreg(s, rn);
     tcg_op2 = read_fp_dreg(s, rm);
@@ -5158,7 +5163,7 @@ static void handle_fpfpcvt(DisasContext *s, int rd, int rn, int opcode,
     TCGv_ptr tcg_fpstatus;
     TCGv_i32 tcg_shift;
 
-    tcg_fpstatus = get_fpstatus_ptr();
+    tcg_fpstatus = get_fpstatus_ptr(false);
 
     tcg_shift = tcg_const_i32(64 - scale);
 
@@ -5870,7 +5875,7 @@ static void disas_simd_across_lanes(DisasContext *s, uint32_t insn)
         TCGv_i32 tcg_elt1 = tcg_temp_new_i32();
         TCGv_i32 tcg_elt2 = tcg_temp_new_i32();
         TCGv_i32 tcg_elt3 = tcg_temp_new_i32();
-        TCGv_ptr fpst = get_fpstatus_ptr();
+        TCGv_ptr fpst = get_fpstatus_ptr(false);
 
         assert(esize == 32);
         assert(elements == 4);
@@ -6372,7 +6377,7 @@ static void disas_simd_scalar_pairwise(DisasContext *s, uint32_t insn)
         }
 
         size = extract32(size, 0, 1) ? 3 : 2;
-        fpst = get_fpstatus_ptr();
+        fpst = get_fpstatus_ptr(false);
         break;
     default:
         unallocated_encoding(s);
@@ -6864,7 +6869,7 @@ static void handle_simd_intfp_conv(DisasContext *s, int rd, int rn,
                                    int fracbits, int size)
 {
     bool is_double = size == 3 ? true : false;
-    TCGv_ptr tcg_fpst = get_fpstatus_ptr();
+    TCGv_ptr tcg_fpst = get_fpstatus_ptr(false);
     TCGv_i32 tcg_shift = tcg_const_i32(fracbits);
     TCGv_i64 tcg_int = tcg_temp_new_i64();
     TCGMemOp mop = size | (is_signed ? MO_SIGN : 0);
@@ -6980,7 +6985,7 @@ static void handle_simd_shift_fpint_conv(DisasContext *s, bool is_scalar,
 
     tcg_rmode = tcg_const_i32(arm_rmode_to_sf(FPROUNDING_ZERO));
     gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
-    tcg_fpstatus = get_fpstatus_ptr();
+    tcg_fpstatus = get_fpstatus_ptr(false);
     tcg_shift = tcg_const_i32(fracbits);
 
     if (is_double) {
@@ -7326,7 +7331,7 @@ static void handle_3same_float(DisasContext *s, int size, int elements,
                                int fpopcode, int rd, int rn, int rm)
 {
     int pass;
-    TCGv_ptr fpst = get_fpstatus_ptr();
+    TCGv_ptr fpst = get_fpstatus_ptr(false);
 
     for (pass = 0; pass < elements; pass++) {
         if (size) {
@@ -7790,7 +7795,7 @@ static void handle_2misc_fcmp_zero(DisasContext *s, int opcode,
         return;
     }
 
-    fpst = get_fpstatus_ptr();
+    fpst = get_fpstatus_ptr(false);
 
     if (is_double) {
         TCGv_i64 tcg_op = tcg_temp_new_i64();
@@ -7897,7 +7902,7 @@ static void handle_2misc_reciprocal(DisasContext *s, int opcode,
                                     int size, int rn, int rd)
 {
     bool is_double = (size == 3);
-    TCGv_ptr fpst = get_fpstatus_ptr();
+    TCGv_ptr fpst = get_fpstatus_ptr(false);
 
     if (is_double) {
         TCGv_i64 tcg_op = tcg_temp_new_i64();
@@ -8296,7 +8301,7 @@ static void disas_simd_scalar_two_reg_misc(DisasContext *s, uint32_t insn)
     if (is_fcvt) {
         tcg_rmode = tcg_const_i32(arm_rmode_to_sf(rmode));
         gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
-        tcg_fpstatus = get_fpstatus_ptr();
+        tcg_fpstatus = get_fpstatus_ptr(false);
     } else {
         tcg_rmode = NULL;
         tcg_fpstatus = NULL;
@@ -9516,7 +9521,7 @@ static void handle_simd_3same_pair(DisasContext *s, int is_q, int u, int opcode,
 
     /* Floating point operations need fpst */
     if (opcode >= 0x58) {
-        fpst = get_fpstatus_ptr();
+        fpst = get_fpstatus_ptr(false);
     } else {
         fpst = NULL;
     }
@@ -10676,7 +10681,7 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
     }
 
     if (need_fpstatus) {
-        tcg_fpstatus = get_fpstatus_ptr();
+        tcg_fpstatus = get_fpstatus_ptr(false);
     } else {
         tcg_fpstatus = NULL;
     }
@@ -11056,7 +11061,7 @@ static void disas_simd_indexed(DisasContext *s, uint32_t insn)
     }
 
     if (is_fp) {
-        fpst = get_fpstatus_ptr();
+        fpst = get_fpstatus_ptr(false);
     } else {
         fpst = NULL;
     }
-- 
2.16.2

[Qemu-devel] [PULL 13/42] target/arm/helper: pass explicit fpst to set_rmode

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

As the rounding mode is now split between FP16 and the rest of
floating point we need to be explicit when tweaking it. Instead of
passing the CPU env we now pass the appropriate fpst pointer directly.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-6-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper.h        |  2 +-
 target/arm/helper.c        |  4 ++--
 target/arm/translate-a64.c | 26 +++++++++++++-------------
 target/arm/translate.c     | 12 ++++++------
 4 files changed, 22 insertions(+), 22 deletions(-)

diff --git a/target/arm/helper.h b/target/arm/helper.h
index 6383d7d09e..81ecb319b3 100644
--- a/target/arm/helper.h
+++ b/target/arm/helper.h
@@ -167,7 +167,7 @@ DEF_HELPER_3(vfp_uhtod, f64, i64, i32, ptr)
 DEF_HELPER_3(vfp_ultod, f64, i64, i32, ptr)
 DEF_HELPER_3(vfp_uqtod, f64, i64, i32, ptr)
 
-DEF_HELPER_FLAGS_2(set_rmode, TCG_CALL_NO_RWG, i32, i32, env)
+DEF_HELPER_FLAGS_2(set_rmode, TCG_CALL_NO_RWG, i32, i32, ptr)
 DEF_HELPER_FLAGS_2(set_neon_rmode, TCG_CALL_NO_RWG, i32, i32, env)
 
 DEF_HELPER_2(vfp_fcvt_f16_to_f32, f32, i32, env)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index f450eb200f..303cd1eaf9 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -11393,9 +11393,9 @@ VFP_CONV_FIX_A64(uq, s, 32, 64, uint64)
 /* Set the current fp rounding mode and return the old one.
  * The argument is a softfloat float_round_ value.
  */
-uint32_t HELPER(set_rmode)(uint32_t rmode, CPUARMState *env)
+uint32_t HELPER(set_rmode)(uint32_t rmode, void *fpstp)
 {
-    float_status *fp_status = &env->vfp.fp_status;
+    float_status *fp_status = fpstp;
 
     uint32_t prev_rmode = get_float_rounding_mode(fp_status);
     set_float_rounding_mode(rmode, fp_status);
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 2c64d2b3fe..91c2b8ed11 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -4628,10 +4628,10 @@ static void handle_fp_1src_single(DisasContext *s, int opcode, int rd, int rn)
     {
         TCGv_i32 tcg_rmode = tcg_const_i32(arm_rmode_to_sf(opcode & 7));
 
-        gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
+        gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst);
         gen_helper_rints(tcg_res, tcg_op, fpst);
 
-        gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
+        gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst);
         tcg_temp_free_i32(tcg_rmode);
         break;
     }
@@ -4687,10 +4687,10 @@ static void handle_fp_1src_double(DisasContext *s, int opcode, int rd, int rn)
     {
         TCGv_i32 tcg_rmode = tcg_const_i32(arm_rmode_to_sf(opcode & 7));
 
-        gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
+        gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst);
         gen_helper_rintd(tcg_res, tcg_op, fpst);
 
-        gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
+        gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst);
         tcg_temp_free_i32(tcg_rmode);
         break;
     }
@@ -5217,7 +5217,7 @@ static void handle_fpfpcvt(DisasContext *s, int rd, int rn, int opcode,
 
         tcg_rmode = tcg_const_i32(arm_rmode_to_sf(rmode));
 
-        gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
+        gen_helper_set_rmode(tcg_rmode, tcg_rmode, tcg_fpstatus);
 
         if (is_double) {
             TCGv_i64 tcg_double = read_fp_dreg(s, rn);
@@ -5264,7 +5264,7 @@ static void handle_fpfpcvt(DisasContext *s, int rd, int rn, int opcode,
             tcg_temp_free_i32(tcg_single);
         }
 
-        gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
+        gen_helper_set_rmode(tcg_rmode, tcg_rmode, tcg_fpstatus);
         tcg_temp_free_i32(tcg_rmode);
 
         if (!sf) {
@@ -6984,8 +6984,8 @@ static void handle_simd_shift_fpint_conv(DisasContext *s, bool is_scalar,
     assert(!(is_scalar && is_q));
 
     tcg_rmode = tcg_const_i32(arm_rmode_to_sf(FPROUNDING_ZERO));
-    gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
     tcg_fpstatus = get_fpstatus_ptr(false);
+    gen_helper_set_rmode(tcg_rmode, tcg_rmode, tcg_fpstatus);
     tcg_shift = tcg_const_i32(fracbits);
 
     if (is_double) {
@@ -7029,7 +7029,7 @@ static void handle_simd_shift_fpint_conv(DisasContext *s, bool is_scalar,
 
     tcg_temp_free_ptr(tcg_fpstatus);
     tcg_temp_free_i32(tcg_shift);
-    gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
+    gen_helper_set_rmode(tcg_rmode, tcg_rmode, tcg_fpstatus);
     tcg_temp_free_i32(tcg_rmode);
 }
 
@@ -8300,8 +8300,8 @@ static void disas_simd_scalar_two_reg_misc(DisasContext *s, uint32_t insn)
 
     if (is_fcvt) {
         tcg_rmode = tcg_const_i32(arm_rmode_to_sf(rmode));
-        gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
         tcg_fpstatus = get_fpstatus_ptr(false);
+        gen_helper_set_rmode(tcg_rmode, tcg_rmode, tcg_fpstatus);
     } else {
         tcg_rmode = NULL;
         tcg_fpstatus = NULL;
@@ -8366,7 +8366,7 @@ static void disas_simd_scalar_two_reg_misc(DisasContext *s, uint32_t insn)
     }
 
     if (is_fcvt) {
-        gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
+        gen_helper_set_rmode(tcg_rmode, tcg_rmode, tcg_fpstatus);
         tcg_temp_free_i32(tcg_rmode);
         tcg_temp_free_ptr(tcg_fpstatus);
     }
@@ -10680,14 +10680,14 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
         return;
     }
 
-    if (need_fpstatus) {
+    if (need_fpstatus || need_rmode) {
         tcg_fpstatus = get_fpstatus_ptr(false);
     } else {
         tcg_fpstatus = NULL;
     }
     if (need_rmode) {
         tcg_rmode = tcg_const_i32(arm_rmode_to_sf(rmode));
-        gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
+        gen_helper_set_rmode(tcg_rmode, tcg_rmode, tcg_fpstatus);
     } else {
         tcg_rmode = NULL;
     }
@@ -10929,7 +10929,7 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
     clear_vec_high(s, is_q, rd);
 
     if (need_rmode) {
-        gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
+        gen_helper_set_rmode(tcg_rmode, tcg_rmode, tcg_fpstatus);
         tcg_temp_free_i32(tcg_rmode);
     }
     if (need_fpstatus) {
diff --git a/target/arm/translate.c b/target/arm/translate.c
index 1270022289..aa6dcaa577 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -3143,7 +3143,7 @@ static int handle_vrint(uint32_t insn, uint32_t rd, uint32_t rm, uint32_t dp,
     TCGv_i32 tcg_rmode;
 
     tcg_rmode = tcg_const_i32(arm_rmode_to_sf(rounding));
-    gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
+    gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst);
 
     if (dp) {
         TCGv_i64 tcg_op;
@@ -3167,7 +3167,7 @@ static int handle_vrint(uint32_t insn, uint32_t rd, uint32_t rm, uint32_t dp,
         tcg_temp_free_i32(tcg_res);
     }
 
-    gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
+    gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst);
     tcg_temp_free_i32(tcg_rmode);
 
     tcg_temp_free_ptr(fpst);
@@ -3184,7 +3184,7 @@ static int handle_vcvt(uint32_t insn, uint32_t rd, uint32_t rm, uint32_t dp,
     tcg_shift = tcg_const_i32(0);
 
     tcg_rmode = tcg_const_i32(arm_rmode_to_sf(rounding));
-    gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
+    gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst);
 
     if (dp) {
         TCGv_i64 tcg_double, tcg_res;
@@ -3222,7 +3222,7 @@ static int handle_vcvt(uint32_t insn, uint32_t rd, uint32_t rm, uint32_t dp,
         tcg_temp_free_i32(tcg_single);
     }
 
-    gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
+    gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst);
     tcg_temp_free_i32(tcg_rmode);
 
     tcg_temp_free_i32(tcg_shift);
@@ -3892,13 +3892,13 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
                         TCGv_ptr fpst = get_fpstatus_ptr(0);
                         TCGv_i32 tcg_rmode;
                         tcg_rmode = tcg_const_i32(float_round_to_zero);
-                        gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
+                        gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst);
                         if (dp) {
                             gen_helper_rintd(cpu_F0d, cpu_F0d, fpst);
                         } else {
                             gen_helper_rints(cpu_F0s, cpu_F0s, fpst);
                         }
-                        gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
+                        gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst);
                         tcg_temp_free_i32(tcg_rmode);
                         tcg_temp_free_ptr(fpst);
                         break;
-- 
2.16.2

[Qemu-devel] [PULL 14/42] arm/translate-a64: implement half-precision F(MIN|MAX)(V|NMV)

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

This implements the half-precision variants of the across vector
reduction operations. This involves a re-factor of the reduction code
which more closely matches the ARM ARM order (and handles 8 element
reductions).

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-7-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper-a64.h    |   4 ++
 target/arm/helper-a64.c    |  18 ++++++
 target/arm/translate-a64.c | 140 ++++++++++++++++++++++++++++-----------------
 3 files changed, 109 insertions(+), 53 deletions(-)

diff --git a/target/arm/helper-a64.h b/target/arm/helper-a64.h
index 85d86741db..cb2a73124d 100644
--- a/target/arm/helper-a64.h
+++ b/target/arm/helper-a64.h
@@ -48,3 +48,7 @@ DEF_HELPER_FLAGS_4(paired_cmpxchg64_le_parallel, TCG_CALL_NO_WG,
 DEF_HELPER_FLAGS_4(paired_cmpxchg64_be, TCG_CALL_NO_WG, i64, env, i64, i64, i64)
 DEF_HELPER_FLAGS_4(paired_cmpxchg64_be_parallel, TCG_CALL_NO_WG,
                    i64, env, i64, i64, i64)
+DEF_HELPER_FLAGS_3(advsimd_maxh, TCG_CALL_NO_RWG, f16, f16, f16, ptr)
+DEF_HELPER_FLAGS_3(advsimd_minh, TCG_CALL_NO_RWG, f16, f16, f16, ptr)
+DEF_HELPER_FLAGS_3(advsimd_maxnumh, TCG_CALL_NO_RWG, f16, f16, f16, ptr)
+DEF_HELPER_FLAGS_3(advsimd_minnumh, TCG_CALL_NO_RWG, f16, f16, f16, ptr)
diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
index 10e08bdc1f..fddd5d242b 100644
--- a/target/arm/helper-a64.c
+++ b/target/arm/helper-a64.c
@@ -572,3 +572,21 @@ uint64_t HELPER(paired_cmpxchg64_be_parallel)(CPUARMState *env, uint64_t addr,
 {
     return do_paired_cmpxchg64_be(env, addr, new_lo, new_hi, true, GETPC());
 }
+
+/*
+ * AdvSIMD half-precision
+ */
+
+#define ADVSIMD_HELPER(name, suffix) HELPER(glue(glue(advsimd_, name), suffix))
+
+#define ADVSIMD_HALFOP(name) \
+float16 ADVSIMD_HELPER(name, h)(float16 a, float16 b, void *fpstp) \
+{ \
+    float_status *fpst = fpstp; \
+    return float16_ ## name(a, b, fpst);    \
+}
+
+ADVSIMD_HALFOP(min)
+ADVSIMD_HALFOP(max)
+ADVSIMD_HALFOP(minnum)
+ADVSIMD_HALFOP(maxnum)
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 91c2b8ed11..ebaf4571ac 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -5741,26 +5741,75 @@ static void disas_simd_zip_trn(DisasContext *s, uint32_t insn)
     tcg_temp_free_i64(tcg_resh);
 }
 
-static void do_minmaxop(DisasContext *s, TCGv_i32 tcg_elt1, TCGv_i32 tcg_elt2,
-                        int opc, bool is_min, TCGv_ptr fpst)
+/*
+ * do_reduction_op helper
+ *
+ * This mirrors the Reduce() pseudocode in the ARM ARM. It is
+ * important for correct NaN propagation that we do these
+ * operations in exactly the order specified by the pseudocode.
+ *
+ * This is a recursive function, TCG temps should be freed by the
+ * calling function once it is done with the values.
+ */
+static TCGv_i32 do_reduction_op(DisasContext *s, int fpopcode, int rn,
+                                int esize, int size, int vmap, TCGv_ptr fpst)
 {
-    /* Helper function for disas_simd_across_lanes: do a single precision
-     * min/max operation on the specified two inputs,
-     * and return the result in tcg_elt1.
-     */
-    if (opc == 0xc) {
-        if (is_min) {
-            gen_helper_vfp_minnums(tcg_elt1, tcg_elt1, tcg_elt2, fpst);
-        } else {
-            gen_helper_vfp_maxnums(tcg_elt1, tcg_elt1, tcg_elt2, fpst);
-        }
+    if (esize == size) {
+        int element;
+        TCGMemOp msize = esize == 16 ? MO_16 : MO_32;
+        TCGv_i32 tcg_elem;
+
+        /* We should have one register left here */
+        assert(ctpop8(vmap) == 1);
+        element = ctz32(vmap);
+        assert(element < 8);
+
+        tcg_elem = tcg_temp_new_i32();
+        read_vec_element_i32(s, tcg_elem, rn, element, msize);
+        return tcg_elem;
     } else {
-        assert(opc == 0xf);
-        if (is_min) {
-            gen_helper_vfp_mins(tcg_elt1, tcg_elt1, tcg_elt2, fpst);
-        } else {
-            gen_helper_vfp_maxs(tcg_elt1, tcg_elt1, tcg_elt2, fpst);
+        int bits = size / 2;
+        int shift = ctpop8(vmap) / 2;
+        int vmap_lo = (vmap >> shift) & vmap;
+        int vmap_hi = (vmap & ~vmap_lo);
+        TCGv_i32 tcg_hi, tcg_lo, tcg_res;
+
+        tcg_hi = do_reduction_op(s, fpopcode, rn, esize, bits, vmap_hi, fpst);
+        tcg_lo = do_reduction_op(s, fpopcode, rn, esize, bits, vmap_lo, fpst);
+        tcg_res = tcg_temp_new_i32();
+
+        switch (fpopcode) {
+        case 0x0c: /* fmaxnmv half-precision */
+            gen_helper_advsimd_maxnumh(tcg_res, tcg_lo, tcg_hi, fpst);
+            break;
+        case 0x0f: /* fmaxv half-precision */
+            gen_helper_advsimd_maxh(tcg_res, tcg_lo, tcg_hi, fpst);
+            break;
+        case 0x1c: /* fminnmv half-precision */
+            gen_helper_advsimd_minnumh(tcg_res, tcg_lo, tcg_hi, fpst);
+            break;
+        case 0x1f: /* fminv half-precision */
+            gen_helper_advsimd_minh(tcg_res, tcg_lo, tcg_hi, fpst);
+            break;
+        case 0x2c: /* fmaxnmv */
+            gen_helper_vfp_maxnums(tcg_res, tcg_lo, tcg_hi, fpst);
+            break;
+        case 0x2f: /* fmaxv */
+            gen_helper_vfp_maxs(tcg_res, tcg_lo, tcg_hi, fpst);
+            break;
+        case 0x3c: /* fminnmv */
+            gen_helper_vfp_minnums(tcg_res, tcg_lo, tcg_hi, fpst);
+            break;
+        case 0x3f: /* fminv */
+            gen_helper_vfp_mins(tcg_res, tcg_lo, tcg_hi, fpst);
+            break;
+        default:
+            g_assert_not_reached();
         }
+
+        tcg_temp_free_i32(tcg_hi);
+        tcg_temp_free_i32(tcg_lo);
+        return tcg_res;
     }
 }
 
@@ -5802,16 +5851,21 @@ static void disas_simd_across_lanes(DisasContext *s, uint32_t insn)
         break;
     case 0xc: /* FMAXNMV, FMINNMV */
     case 0xf: /* FMAXV, FMINV */
-        if (!is_u || !is_q || extract32(size, 0, 1)) {
-            unallocated_encoding(s);
-            return;
-        }
-        /* Bit 1 of size field encodes min vs max, and actual size is always
-         * 32 bits: adjust the size variable so following code can rely on it
+        /* Bit 1 of size field encodes min vs max and the actual size
+         * depends on the encoding of the U bit. If not set (and FP16
+         * enabled) then we do half-precision float instead of single
+         * precision.
          */
         is_min = extract32(size, 1, 1);
         is_fp = true;
-        size = 2;
+        if (!is_u && arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {
+            size = 1;
+        } else if (!is_u || !is_q || extract32(size, 0, 1)) {
+            unallocated_encoding(s);
+            return;
+        } else {
+            size = 2;
+        }
         break;
     default:
         unallocated_encoding(s);
@@ -5868,38 +5922,18 @@ static void disas_simd_across_lanes(DisasContext *s, uint32_t insn)
 
         }
     } else {
-        /* Floating point ops which work on 32 bit (single) intermediates.
+        /* Floating point vector reduction ops which work across 32
+         * bit (single) or 16 bit (half-precision) intermediates.
          * Note that correct NaN propagation requires that we do these
          * operations in exactly the order specified by the pseudocode.
          */
-        TCGv_i32 tcg_elt1 = tcg_temp_new_i32();
-        TCGv_i32 tcg_elt2 = tcg_temp_new_i32();
-        TCGv_i32 tcg_elt3 = tcg_temp_new_i32();
-        TCGv_ptr fpst = get_fpstatus_ptr(false);
-
-        assert(esize == 32);
-        assert(elements == 4);
-
-        read_vec_element(s, tcg_elt, rn, 0, MO_32);
-        tcg_gen_extrl_i64_i32(tcg_elt1, tcg_elt);
-        read_vec_element(s, tcg_elt, rn, 1, MO_32);
-        tcg_gen_extrl_i64_i32(tcg_elt2, tcg_elt);
-
-        do_minmaxop(s, tcg_elt1, tcg_elt2, opcode, is_min, fpst);
-
-        read_vec_element(s, tcg_elt, rn, 2, MO_32);
-        tcg_gen_extrl_i64_i32(tcg_elt2, tcg_elt);
-        read_vec_element(s, tcg_elt, rn, 3, MO_32);
-        tcg_gen_extrl_i64_i32(tcg_elt3, tcg_elt);
-
-        do_minmaxop(s, tcg_elt2, tcg_elt3, opcode, is_min, fpst);
-
-        do_minmaxop(s, tcg_elt1, tcg_elt2, opcode, is_min, fpst);
-
-        tcg_gen_extu_i32_i64(tcg_res, tcg_elt1);
-        tcg_temp_free_i32(tcg_elt1);
-        tcg_temp_free_i32(tcg_elt2);
-        tcg_temp_free_i32(tcg_elt3);
+        TCGv_ptr fpst = get_fpstatus_ptr(size == MO_16);
+        int fpopcode = opcode | is_min << 4 | is_u << 5;
+        int vmap = (1 << elements) - 1;
+        TCGv_i32 tcg_res32 = do_reduction_op(s, fpopcode, rn, esize,
+                                             (is_q ? 128 : 64), vmap, fpst);
+        tcg_gen_extu_i32_i64(tcg_res, tcg_res32);
+        tcg_temp_free_i32(tcg_res32);
         tcg_temp_free_ptr(fpst);
     }
 
-- 
2.16.2

[Qemu-devel] [PULL 15/42] arm/translate-a64: handle_3same_64 comment fix

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

We do implement all the opcodes.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-8-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/translate-a64.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index ebaf4571ac..5dd54b7ac4 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -7278,8 +7278,7 @@ static void handle_3same_64(DisasContext *s, int opcode, bool u,
     /* Handle 64x64->64 opcodes which are shared between the scalar
      * and vector 3-same groups. We cover every opcode where size == 3
      * is valid in either the three-reg-same (integer, not pairwise)
-     * or scalar-three-reg-same groups. (Some opcodes are not yet
-     * implemented.)
+     * or scalar-three-reg-same groups.
      */
     TCGCond cond;
 
-- 
2.16.2

[Qemu-devel] [PULL 16/42] arm/translate-a64: initial decode for simd_three_reg_same_fp16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

This is the initial decode skeleton for the Advanced SIMD three same
instruction group.

The fprintf is purely to aid debugging as the additional instructions
are added. It will be removed once the group is complete.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-9-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/translate-a64.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 5dd54b7ac4..4828457b5b 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -10228,6 +10228,78 @@ static void disas_simd_three_reg_same(DisasContext *s, uint32_t insn)
     }
 }
 
+/*
+ * Advanced SIMD three same (ARMv8.2 FP16 variants)
+ *
+ *  31  30  29  28       24 23  22 21 20  16 15 14 13    11 10  9    5 4    0
+ * +---+---+---+-----------+---------+------+-----+--------+---+------+------+
+ * | 0 | Q | U | 0 1 1 1 0 | a | 1 0 |  Rm  | 0 0 | opcode | 1 |  Rn  |  Rd  |
+ * +---+---+---+-----------+---------+------+-----+--------+---+------+------+
+ *
+ * This includes FMULX, FCMEQ (register), FRECPS, FRSQRTS, FCMGE
+ * (register), FACGE, FABD, FCMGT (register) and FACGT.
+ *
+ */
+static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn)
+{
+    int opcode, fpopcode;
+    int is_q, u, a, rm, rn, rd;
+    int datasize, elements;
+    int pass;
+    TCGv_ptr fpst;
+
+    if (!arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {
+        unallocated_encoding(s);
+        return;
+    }
+
+    if (!fp_access_check(s)) {
+        return;
+    }
+
+    /* For these floating point ops, the U, a and opcode bits
+     * together indicate the operation.
+     */
+    opcode = extract32(insn, 11, 3);
+    u = extract32(insn, 29, 1);
+    a = extract32(insn, 23, 1);
+    is_q = extract32(insn, 30, 1);
+    rm = extract32(insn, 16, 5);
+    rn = extract32(insn, 5, 5);
+    rd = extract32(insn, 0, 5);
+
+    fpopcode = opcode | (a << 3) |  (u << 4);
+    datasize = is_q ? 128 : 64;
+    elements = datasize / 16;
+
+    fpst = get_fpstatus_ptr(true);
+
+    for (pass = 0; pass < elements; pass++) {
+        TCGv_i32 tcg_op1 = tcg_temp_new_i32();
+        TCGv_i32 tcg_op2 = tcg_temp_new_i32();
+        TCGv_i32 tcg_res = tcg_temp_new_i32();
+
+        read_vec_element_i32(s, tcg_op1, rn, pass, MO_16);
+        read_vec_element_i32(s, tcg_op2, rm, pass, MO_16);
+
+        switch (fpopcode) {
+        default:
+            fprintf(stderr, "%s: insn %#04x, fpop %#2x @ %#" PRIx64 "\n",
+                    __func__, insn, fpopcode, s->pc);
+            g_assert_not_reached();
+        }
+
+        write_vec_element_i32(s, tcg_res, rd, pass, MO_16);
+        tcg_temp_free_i32(tcg_res);
+        tcg_temp_free_i32(tcg_op1);
+        tcg_temp_free_i32(tcg_op2);
+    }
+
+    tcg_temp_free_ptr(fpst);
+
+    clear_vec_high(s, is_q, rd);
+}
+
 static void handle_2misc_widening(DisasContext *s, int opcode, bool is_q,
                                   int size, int rn, int rd)
 {
@@ -11975,6 +12047,7 @@ static const AArch64DecodeTable data_proc_simd[] = {
     { 0xce000000, 0xff808000, disas_crypto_four_reg },
     { 0xce800000, 0xffe00000, disas_crypto_xar },
     { 0xce408000, 0xffe0c000, disas_crypto_three_reg_imm2 },
+    { 0x0e400400, 0x9f60c400, disas_simd_three_reg_same_fp16 },
     { 0x00000000, 0x00000000, NULL }
 };
 
-- 
2.16.2

[Qemu-devel] [PULL 17/42] arm/translate-a64: add FP16 FADD/FABD/FSUB/FMUL/FDIV to simd_three_reg_same_fp16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

The fprintf is only there for debugging as the skeleton is added to,
it will be removed once the skeleton is complete.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-10-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper-a64.h    |  4 ++++
 target/arm/helper-a64.c    |  4 ++++
 target/arm/translate-a64.c | 28 ++++++++++++++++++++++++++++
 3 files changed, 36 insertions(+)

diff --git a/target/arm/helper-a64.h b/target/arm/helper-a64.h
index cb2a73124d..bac9469426 100644
--- a/target/arm/helper-a64.h
+++ b/target/arm/helper-a64.h
@@ -52,3 +52,7 @@ DEF_HELPER_FLAGS_3(advsimd_maxh, TCG_CALL_NO_RWG, f16, f16, f16, ptr)
 DEF_HELPER_FLAGS_3(advsimd_minh, TCG_CALL_NO_RWG, f16, f16, f16, ptr)
 DEF_HELPER_FLAGS_3(advsimd_maxnumh, TCG_CALL_NO_RWG, f16, f16, f16, ptr)
 DEF_HELPER_FLAGS_3(advsimd_minnumh, TCG_CALL_NO_RWG, f16, f16, f16, ptr)
+DEF_HELPER_3(advsimd_addh, f16, f16, f16, ptr)
+DEF_HELPER_3(advsimd_subh, f16, f16, f16, ptr)
+DEF_HELPER_3(advsimd_mulh, f16, f16, f16, ptr)
+DEF_HELPER_3(advsimd_divh, f16, f16, f16, ptr)
diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
index fddd5d242b..931a6d3c34 100644
--- a/target/arm/helper-a64.c
+++ b/target/arm/helper-a64.c
@@ -586,6 +586,10 @@ float16 ADVSIMD_HELPER(name, h)(float16 a, float16 b, void *fpstp) \
     return float16_ ## name(a, b, fpst);    \
 }
 
+ADVSIMD_HALFOP(add)
+ADVSIMD_HALFOP(sub)
+ADVSIMD_HALFOP(mul)
+ADVSIMD_HALFOP(div)
 ADVSIMD_HALFOP(min)
 ADVSIMD_HALFOP(max)
 ADVSIMD_HALFOP(minnum)
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 4828457b5b..f8770ee1e9 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -10283,6 +10283,34 @@ static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn)
         read_vec_element_i32(s, tcg_op2, rm, pass, MO_16);
 
         switch (fpopcode) {
+        case 0x0: /* FMAXNM */
+            gen_helper_advsimd_maxnumh(tcg_res, tcg_op1, tcg_op2, fpst);
+            break;
+        case 0x2: /* FADD */
+            gen_helper_advsimd_addh(tcg_res, tcg_op1, tcg_op2, fpst);
+            break;
+        case 0x6: /* FMAX */
+            gen_helper_advsimd_maxh(tcg_res, tcg_op1, tcg_op2, fpst);
+            break;
+        case 0x8: /* FMINNM */
+            gen_helper_advsimd_minnumh(tcg_res, tcg_op1, tcg_op2, fpst);
+            break;
+        case 0xa: /* FSUB */
+            gen_helper_advsimd_subh(tcg_res, tcg_op1, tcg_op2, fpst);
+            break;
+        case 0xe: /* FMIN */
+            gen_helper_advsimd_minh(tcg_res, tcg_op1, tcg_op2, fpst);
+            break;
+        case 0x13: /* FMUL */
+            gen_helper_advsimd_mulh(tcg_res, tcg_op1, tcg_op2, fpst);
+            break;
+        case 0x17: /* FDIV */
+            gen_helper_advsimd_divh(tcg_res, tcg_op1, tcg_op2, fpst);
+            break;
+        case 0x1a: /* FABD */
+            gen_helper_advsimd_subh(tcg_res, tcg_op1, tcg_op2, fpst);
+            tcg_gen_andi_i32(tcg_res, tcg_res, 0x7fff);
+            break;
         default:
             fprintf(stderr, "%s: insn %#04x, fpop %#2x @ %#" PRIx64 "\n",
                     __func__, insn, fpopcode, s->pc);
-- 
2.16.2

[Qemu-devel] [PULL 18/42] arm/translate-a64: add FP16 F[A]C[EQ/GE/GT] to simd_three_reg_same_fp16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

These use the generic float16_compare functionality which in turn uses
the common float_compare code from the softfloat re-factor.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-11-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper-a64.h    |  5 +++++
 target/arm/helper-a64.c    | 49 ++++++++++++++++++++++++++++++++++++++++++++++
 target/arm/translate-a64.c | 15 ++++++++++++++
 3 files changed, 69 insertions(+)

diff --git a/target/arm/helper-a64.h b/target/arm/helper-a64.h
index bac9469426..1cf40bda5e 100644
--- a/target/arm/helper-a64.h
+++ b/target/arm/helper-a64.h
@@ -56,3 +56,8 @@ DEF_HELPER_3(advsimd_addh, f16, f16, f16, ptr)
 DEF_HELPER_3(advsimd_subh, f16, f16, f16, ptr)
 DEF_HELPER_3(advsimd_mulh, f16, f16, f16, ptr)
 DEF_HELPER_3(advsimd_divh, f16, f16, f16, ptr)
+DEF_HELPER_3(advsimd_ceq_f16, i32, f16, f16, ptr)
+DEF_HELPER_3(advsimd_cge_f16, i32, f16, f16, ptr)
+DEF_HELPER_3(advsimd_cgt_f16, i32, f16, f16, ptr)
+DEF_HELPER_3(advsimd_acge_f16, i32, f16, f16, ptr)
+DEF_HELPER_3(advsimd_acgt_f16, i32, f16, f16, ptr)
diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
index 931a6d3c34..d0b284fec4 100644
--- a/target/arm/helper-a64.c
+++ b/target/arm/helper-a64.c
@@ -594,3 +594,52 @@ ADVSIMD_HALFOP(min)
 ADVSIMD_HALFOP(max)
 ADVSIMD_HALFOP(minnum)
 ADVSIMD_HALFOP(maxnum)
+
+/*
+ * Floating point comparisons produce an integer result. Softfloat
+ * routines return float_relation types which we convert to the 0/-1
+ * Neon requires.
+ */
+
+#define ADVSIMD_CMPRES(test) (test) ? 0xffff : 0
+
+uint32_t HELPER(advsimd_ceq_f16)(float16 a, float16 b, void *fpstp)
+{
+    float_status *fpst = fpstp;
+    int compare = float16_compare_quiet(a, b, fpst);
+    return ADVSIMD_CMPRES(compare == float_relation_equal);
+}
+
+uint32_t HELPER(advsimd_cge_f16)(float16 a, float16 b, void *fpstp)
+{
+    float_status *fpst = fpstp;
+    int compare = float16_compare(a, b, fpst);
+    return ADVSIMD_CMPRES(compare == float_relation_greater ||
+                          compare == float_relation_equal);
+}
+
+uint32_t HELPER(advsimd_cgt_f16)(float16 a, float16 b, void *fpstp)
+{
+    float_status *fpst = fpstp;
+    int compare = float16_compare(a, b, fpst);
+    return ADVSIMD_CMPRES(compare == float_relation_greater);
+}
+
+uint32_t HELPER(advsimd_acge_f16)(float16 a, float16 b, void *fpstp)
+{
+    float_status *fpst = fpstp;
+    float16 f0 = float16_abs(a);
+    float16 f1 = float16_abs(b);
+    int compare = float16_compare(f0, f1, fpst);
+    return ADVSIMD_CMPRES(compare == float_relation_greater ||
+                          compare == float_relation_equal);
+}
+
+uint32_t HELPER(advsimd_acgt_f16)(float16 a, float16 b, void *fpstp)
+{
+    float_status *fpst = fpstp;
+    float16 f0 = float16_abs(a);
+    float16 f1 = float16_abs(b);
+    int compare = float16_compare(f0, f1, fpst);
+    return ADVSIMD_CMPRES(compare == float_relation_greater);
+}
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index f8770ee1e9..fb74dc1c45 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -10289,6 +10289,9 @@ static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn)
         case 0x2: /* FADD */
             gen_helper_advsimd_addh(tcg_res, tcg_op1, tcg_op2, fpst);
             break;
+        case 0x4: /* FCMEQ */
+            gen_helper_advsimd_ceq_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+            break;
         case 0x6: /* FMAX */
             gen_helper_advsimd_maxh(tcg_res, tcg_op1, tcg_op2, fpst);
             break;
@@ -10304,6 +10307,12 @@ static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn)
         case 0x13: /* FMUL */
             gen_helper_advsimd_mulh(tcg_res, tcg_op1, tcg_op2, fpst);
             break;
+        case 0x14: /* FCMGE */
+            gen_helper_advsimd_cge_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+            break;
+        case 0x15: /* FACGE */
+            gen_helper_advsimd_acge_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+            break;
         case 0x17: /* FDIV */
             gen_helper_advsimd_divh(tcg_res, tcg_op1, tcg_op2, fpst);
             break;
@@ -10311,6 +10320,12 @@ static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn)
             gen_helper_advsimd_subh(tcg_res, tcg_op1, tcg_op2, fpst);
             tcg_gen_andi_i32(tcg_res, tcg_res, 0x7fff);
             break;
+        case 0x1c: /* FCMGT */
+            gen_helper_advsimd_cgt_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+            break;
+        case 0x1d: /* FACGT */
+            gen_helper_advsimd_acgt_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+            break;
         default:
             fprintf(stderr, "%s: insn %#04x, fpop %#2x @ %#" PRIx64 "\n",
                     __func__, insn, fpopcode, s->pc);
-- 
2.16.2

[Qemu-devel] [PULL 19/42] arm/translate-a64: add FP16 FMULA/X/S to simd_three_reg_same_fp16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-12-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper-a64.h    |  2 ++
 target/arm/helper-a64.c    | 24 ++++++++++++++++++++++++
 target/arm/translate-a64.c | 15 +++++++++++++++
 3 files changed, 41 insertions(+)

diff --git a/target/arm/helper-a64.h b/target/arm/helper-a64.h
index 1cf40bda5e..9c1a95594c 100644
--- a/target/arm/helper-a64.h
+++ b/target/arm/helper-a64.h
@@ -61,3 +61,5 @@ DEF_HELPER_3(advsimd_cge_f16, i32, f16, f16, ptr)
 DEF_HELPER_3(advsimd_cgt_f16, i32, f16, f16, ptr)
 DEF_HELPER_3(advsimd_acge_f16, i32, f16, f16, ptr)
 DEF_HELPER_3(advsimd_acgt_f16, i32, f16, f16, ptr)
+DEF_HELPER_3(advsimd_mulxh, f16, f16, f16, ptr)
+DEF_HELPER_4(advsimd_muladdh, f16, f16, f16, f16, ptr)
diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
index d0b284fec4..1ef13abd76 100644
--- a/target/arm/helper-a64.c
+++ b/target/arm/helper-a64.c
@@ -595,6 +595,30 @@ ADVSIMD_HALFOP(max)
 ADVSIMD_HALFOP(minnum)
 ADVSIMD_HALFOP(maxnum)
 
+/* Data processing - scalar floating-point and advanced SIMD */
+float16 HELPER(advsimd_mulxh)(float16 a, float16 b, void *fpstp)
+{
+    float_status *fpst = fpstp;
+
+    a = float16_squash_input_denormal(a, fpst);
+    b = float16_squash_input_denormal(b, fpst);
+
+    if ((float16_is_zero(a) && float16_is_infinity(b)) ||
+        (float16_is_infinity(a) && float16_is_zero(b))) {
+        /* 2.0 with the sign bit set to sign(A) XOR sign(B) */
+        return make_float16((1U << 14) |
+                            ((float16_val(a) ^ float16_val(b)) & (1U << 15)));
+    }
+    return float16_mul(a, b, fpst);
+}
+
+/* fused multiply-accumulate */
+float16 HELPER(advsimd_muladdh)(float16 a, float16 b, float16 c, void *fpstp)
+{
+    float_status *fpst = fpstp;
+    return float16_muladd(a, b, c, 0, fpst);
+}
+
 /*
  * Floating point comparisons produce an integer result. Softfloat
  * routines return float_relation types which we convert to the 0/-1
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index fb74dc1c45..0e2d298687 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -10286,9 +10286,17 @@ static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn)
         case 0x0: /* FMAXNM */
             gen_helper_advsimd_maxnumh(tcg_res, tcg_op1, tcg_op2, fpst);
             break;
+        case 0x1: /* FMLA */
+            read_vec_element_i32(s, tcg_res, rd, pass, MO_16);
+            gen_helper_advsimd_muladdh(tcg_res, tcg_op1, tcg_op2, tcg_res,
+                                       fpst);
+            break;
         case 0x2: /* FADD */
             gen_helper_advsimd_addh(tcg_res, tcg_op1, tcg_op2, fpst);
             break;
+        case 0x3: /* FMULX */
+            gen_helper_advsimd_mulxh(tcg_res, tcg_op1, tcg_op2, fpst);
+            break;
         case 0x4: /* FCMEQ */
             gen_helper_advsimd_ceq_f16(tcg_res, tcg_op1, tcg_op2, fpst);
             break;
@@ -10298,6 +10306,13 @@ static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn)
         case 0x8: /* FMINNM */
             gen_helper_advsimd_minnumh(tcg_res, tcg_op1, tcg_op2, fpst);
             break;
+        case 0x9: /* FMLS */
+             /* As usual for ARM, separate negation for fused multiply-add */
+            tcg_gen_xori_i32(tcg_op1, tcg_op1, 0x8000);
+            read_vec_element_i32(s, tcg_res, rd, pass, MO_16);
+            gen_helper_advsimd_muladdh(tcg_res, tcg_op1, tcg_op2, tcg_res,
+                                       fpst);
+            break;
         case 0xa: /* FSUB */
             gen_helper_advsimd_subh(tcg_res, tcg_op1, tcg_op2, fpst);
             break;
-- 
2.16.2

[Qemu-devel] [PULL 20/42] arm/translate-a64: add FP16 FR[ECP/SQRT]S to simd_three_reg_same_fp16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

As some of the constants here will also be needed
elsewhere (specifically for the upcoming SVE support) we move them out
to softfloat.h.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-13-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 include/fpu/softfloat.h    | 18 +++++++++++++-----
 target/arm/helper-a64.h    |  2 ++
 target/arm/helper-a64.c    | 34 ++++++++++++++++++++++++++++++++++
 target/arm/translate-a64.c |  6 ++++++
 4 files changed, 55 insertions(+), 5 deletions(-)

diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h
index 9b7b5e34e2..27876e711c 100644
--- a/include/fpu/softfloat.h
+++ b/include/fpu/softfloat.h
@@ -306,8 +306,11 @@ static inline float16 float16_set_sign(float16 a, int sign)
 }
 
 #define float16_zero make_float16(0)
-#define float16_one make_float16(0x3c00)
 #define float16_half make_float16(0x3800)
+#define float16_one make_float16(0x3c00)
+#define float16_one_point_five make_float16(0x3e00)
+#define float16_two make_float16(0x4000)
+#define float16_three make_float16(0x4200)
 #define float16_infinity make_float16(0x7c00)
 
 /*----------------------------------------------------------------------------
@@ -415,11 +418,13 @@ static inline float32 float32_set_sign(float32 a, int sign)
 }
 
 #define float32_zero make_float32(0)
-#define float32_one make_float32(0x3f800000)
 #define float32_half make_float32(0x3f000000)
+#define float32_one make_float32(0x3f800000)
+#define float32_one_point_five make_float32(0x3fc00000)
+#define float32_two make_float32(0x40000000)
+#define float32_three make_float32(0x40400000)
 #define float32_infinity make_float32(0x7f800000)
 
-
 /*----------------------------------------------------------------------------
 | The pattern for a default generated single-precision NaN.
 *----------------------------------------------------------------------------*/
@@ -526,9 +531,12 @@ static inline float64 float64_set_sign(float64 a, int sign)
 }
 
 #define float64_zero make_float64(0)
-#define float64_one make_float64(0x3ff0000000000000LL)
-#define float64_ln2 make_float64(0x3fe62e42fefa39efLL)
 #define float64_half make_float64(0x3fe0000000000000LL)
+#define float64_one make_float64(0x3ff0000000000000LL)
+#define float64_one_point_five make_float64(0x3FF8000000000000ULL)
+#define float64_two make_float64(0x4000000000000000ULL)
+#define float64_three make_float64(0x4008000000000000ULL)
+#define float64_ln2 make_float64(0x3fe62e42fefa39efLL)
 #define float64_infinity make_float64(0x7ff0000000000000LL)
 
 /*----------------------------------------------------------------------------
diff --git a/target/arm/helper-a64.h b/target/arm/helper-a64.h
index 9c1a95594c..79012eee9d 100644
--- a/target/arm/helper-a64.h
+++ b/target/arm/helper-a64.h
@@ -29,8 +29,10 @@ DEF_HELPER_FLAGS_3(vfp_mulxd, TCG_CALL_NO_RWG, f64, f64, f64, ptr)
 DEF_HELPER_FLAGS_3(neon_ceq_f64, TCG_CALL_NO_RWG, i64, i64, i64, ptr)
 DEF_HELPER_FLAGS_3(neon_cge_f64, TCG_CALL_NO_RWG, i64, i64, i64, ptr)
 DEF_HELPER_FLAGS_3(neon_cgt_f64, TCG_CALL_NO_RWG, i64, i64, i64, ptr)
+DEF_HELPER_FLAGS_3(recpsf_f16, TCG_CALL_NO_RWG, f16, f16, f16, ptr)
 DEF_HELPER_FLAGS_3(recpsf_f32, TCG_CALL_NO_RWG, f32, f32, f32, ptr)
 DEF_HELPER_FLAGS_3(recpsf_f64, TCG_CALL_NO_RWG, f64, f64, f64, ptr)
+DEF_HELPER_FLAGS_3(rsqrtsf_f16, TCG_CALL_NO_RWG, f16, f16, f16, ptr)
 DEF_HELPER_FLAGS_3(rsqrtsf_f32, TCG_CALL_NO_RWG, f32, f32, f32, ptr)
 DEF_HELPER_FLAGS_3(rsqrtsf_f64, TCG_CALL_NO_RWG, f64, f64, f64, ptr)
 DEF_HELPER_FLAGS_1(neon_addlp_s8, TCG_CALL_NO_RWG_SE, i64, i64)
diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
index 1ef13abd76..8fdbe034f3 100644
--- a/target/arm/helper-a64.c
+++ b/target/arm/helper-a64.c
@@ -192,6 +192,10 @@ uint64_t HELPER(neon_cgt_f64)(float64 a, float64 b, void *fpstp)
  * versions, these do a fully fused multiply-add or
  * multiply-add-and-halve.
  */
+#define float16_two make_float16(0x4000)
+#define float16_three make_float16(0x4200)
+#define float16_one_point_five make_float16(0x3e00)
+
 #define float32_two make_float32(0x40000000)
 #define float32_three make_float32(0x40400000)
 #define float32_one_point_five make_float32(0x3fc00000)
@@ -200,6 +204,21 @@ uint64_t HELPER(neon_cgt_f64)(float64 a, float64 b, void *fpstp)
 #define float64_three make_float64(0x4008000000000000ULL)
 #define float64_one_point_five make_float64(0x3FF8000000000000ULL)
 
+float16 HELPER(recpsf_f16)(float16 a, float16 b, void *fpstp)
+{
+    float_status *fpst = fpstp;
+
+    a = float16_squash_input_denormal(a, fpst);
+    b = float16_squash_input_denormal(b, fpst);
+
+    a = float16_chs(a);
+    if ((float16_is_infinity(a) && float16_is_zero(b)) ||
+        (float16_is_infinity(b) && float16_is_zero(a))) {
+        return float16_two;
+    }
+    return float16_muladd(a, b, float16_two, 0, fpst);
+}
+
 float32 HELPER(recpsf_f32)(float32 a, float32 b, void *fpstp)
 {
     float_status *fpst = fpstp;
@@ -230,6 +249,21 @@ float64 HELPER(recpsf_f64)(float64 a, float64 b, void *fpstp)
     return float64_muladd(a, b, float64_two, 0, fpst);
 }
 
+float16 HELPER(rsqrtsf_f16)(float16 a, float16 b, void *fpstp)
+{
+    float_status *fpst = fpstp;
+
+    a = float16_squash_input_denormal(a, fpst);
+    b = float16_squash_input_denormal(b, fpst);
+
+    a = float16_chs(a);
+    if ((float16_is_infinity(a) && float16_is_zero(b)) ||
+        (float16_is_infinity(b) && float16_is_zero(a))) {
+        return float16_one_point_five;
+    }
+    return float16_muladd(a, b, float16_three, float_muladd_halve_result, fpst);
+}
+
 float32 HELPER(rsqrtsf_f32)(float32 a, float32 b, void *fpstp)
 {
     float_status *fpst = fpstp;
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 0e2d298687..217e73ef58 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -10303,6 +10303,9 @@ static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn)
         case 0x6: /* FMAX */
             gen_helper_advsimd_maxh(tcg_res, tcg_op1, tcg_op2, fpst);
             break;
+        case 0x7: /* FRECPS */
+            gen_helper_recpsf_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+            break;
         case 0x8: /* FMINNM */
             gen_helper_advsimd_minnumh(tcg_res, tcg_op1, tcg_op2, fpst);
             break;
@@ -10319,6 +10322,9 @@ static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn)
         case 0xe: /* FMIN */
             gen_helper_advsimd_minh(tcg_res, tcg_op1, tcg_op2, fpst);
             break;
+        case 0xf: /* FRSQRTS */
+            gen_helper_rsqrtsf_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+            break;
         case 0x13: /* FMUL */
             gen_helper_advsimd_mulh(tcg_res, tcg_op1, tcg_op2, fpst);
             break;
-- 
2.16.2

[Qemu-devel] [PULL 21/42] arm/translate-a64: add FP16 pairwise ops simd_three_reg_same_fp16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

This includes FMAXNMP, FADDP, FMAXP, FMINNMP, FMINP.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-14-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/translate-a64.c | 208 +++++++++++++++++++++++++++++----------------
 1 file changed, 133 insertions(+), 75 deletions(-)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 217e73ef58..e96e6cdd15 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -10247,6 +10247,7 @@ static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn)
     int datasize, elements;
     int pass;
     TCGv_ptr fpst;
+    bool pairwise = false;
 
     if (!arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {
         unallocated_encoding(s);
@@ -10272,91 +10273,148 @@ static void disas_simd_three_reg_same_fp16(DisasContext *s, uint32_t insn)
     datasize = is_q ? 128 : 64;
     elements = datasize / 16;
 
+    switch (fpopcode) {
+    case 0x10: /* FMAXNMP */
+    case 0x12: /* FADDP */
+    case 0x16: /* FMAXP */
+    case 0x18: /* FMINNMP */
+    case 0x1e: /* FMINP */
+        pairwise = true;
+        break;
+    }
+
     fpst = get_fpstatus_ptr(true);
 
-    for (pass = 0; pass < elements; pass++) {
+    if (pairwise) {
+        int maxpass = is_q ? 8 : 4;
         TCGv_i32 tcg_op1 = tcg_temp_new_i32();
         TCGv_i32 tcg_op2 = tcg_temp_new_i32();
-        TCGv_i32 tcg_res = tcg_temp_new_i32();
+        TCGv_i32 tcg_res[8];
 
-        read_vec_element_i32(s, tcg_op1, rn, pass, MO_16);
-        read_vec_element_i32(s, tcg_op2, rm, pass, MO_16);
+        for (pass = 0; pass < maxpass; pass++) {
+            int passreg = pass < (maxpass / 2) ? rn : rm;
+            int passelt = (pass << 1) & (maxpass - 1);
 
-        switch (fpopcode) {
-        case 0x0: /* FMAXNM */
-            gen_helper_advsimd_maxnumh(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0x1: /* FMLA */
-            read_vec_element_i32(s, tcg_res, rd, pass, MO_16);
-            gen_helper_advsimd_muladdh(tcg_res, tcg_op1, tcg_op2, tcg_res,
-                                       fpst);
-            break;
-        case 0x2: /* FADD */
-            gen_helper_advsimd_addh(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0x3: /* FMULX */
-            gen_helper_advsimd_mulxh(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0x4: /* FCMEQ */
-            gen_helper_advsimd_ceq_f16(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0x6: /* FMAX */
-            gen_helper_advsimd_maxh(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0x7: /* FRECPS */
-            gen_helper_recpsf_f16(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0x8: /* FMINNM */
-            gen_helper_advsimd_minnumh(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0x9: /* FMLS */
-             /* As usual for ARM, separate negation for fused multiply-add */
-            tcg_gen_xori_i32(tcg_op1, tcg_op1, 0x8000);
-            read_vec_element_i32(s, tcg_res, rd, pass, MO_16);
-            gen_helper_advsimd_muladdh(tcg_res, tcg_op1, tcg_op2, tcg_res,
-                                       fpst);
-            break;
-        case 0xa: /* FSUB */
-            gen_helper_advsimd_subh(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0xe: /* FMIN */
-            gen_helper_advsimd_minh(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0xf: /* FRSQRTS */
-            gen_helper_rsqrtsf_f16(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0x13: /* FMUL */
-            gen_helper_advsimd_mulh(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0x14: /* FCMGE */
-            gen_helper_advsimd_cge_f16(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0x15: /* FACGE */
-            gen_helper_advsimd_acge_f16(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0x17: /* FDIV */
-            gen_helper_advsimd_divh(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0x1a: /* FABD */
-            gen_helper_advsimd_subh(tcg_res, tcg_op1, tcg_op2, fpst);
-            tcg_gen_andi_i32(tcg_res, tcg_res, 0x7fff);
-            break;
-        case 0x1c: /* FCMGT */
-            gen_helper_advsimd_cgt_f16(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0x1d: /* FACGT */
-            gen_helper_advsimd_acgt_f16(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        default:
-            fprintf(stderr, "%s: insn %#04x, fpop %#2x @ %#" PRIx64 "\n",
-                    __func__, insn, fpopcode, s->pc);
-            g_assert_not_reached();
+            read_vec_element_i32(s, tcg_op1, passreg, passelt, MO_16);
+            read_vec_element_i32(s, tcg_op2, passreg, passelt + 1, MO_16);
+            tcg_res[pass] = tcg_temp_new_i32();
+
+            switch (fpopcode) {
+            case 0x10: /* FMAXNMP */
+                gen_helper_advsimd_maxnumh(tcg_res[pass], tcg_op1, tcg_op2,
+                                           fpst);
+                break;
+            case 0x12: /* FADDP */
+                gen_helper_advsimd_addh(tcg_res[pass], tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x16: /* FMAXP */
+                gen_helper_advsimd_maxh(tcg_res[pass], tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x18: /* FMINNMP */
+                gen_helper_advsimd_minnumh(tcg_res[pass], tcg_op1, tcg_op2,
+                                           fpst);
+                break;
+            case 0x1e: /* FMINP */
+                gen_helper_advsimd_minh(tcg_res[pass], tcg_op1, tcg_op2, fpst);
+                break;
+            default:
+                g_assert_not_reached();
+            }
+        }
+
+        for (pass = 0; pass < maxpass; pass++) {
+            write_vec_element_i32(s, tcg_res[pass], rd, pass, MO_16);
+            tcg_temp_free_i32(tcg_res[pass]);
         }
 
-        write_vec_element_i32(s, tcg_res, rd, pass, MO_16);
-        tcg_temp_free_i32(tcg_res);
         tcg_temp_free_i32(tcg_op1);
         tcg_temp_free_i32(tcg_op2);
+
+    } else {
+        for (pass = 0; pass < elements; pass++) {
+            TCGv_i32 tcg_op1 = tcg_temp_new_i32();
+            TCGv_i32 tcg_op2 = tcg_temp_new_i32();
+            TCGv_i32 tcg_res = tcg_temp_new_i32();
+
+            read_vec_element_i32(s, tcg_op1, rn, pass, MO_16);
+            read_vec_element_i32(s, tcg_op2, rm, pass, MO_16);
+
+            switch (fpopcode) {
+            case 0x0: /* FMAXNM */
+                gen_helper_advsimd_maxnumh(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x1: /* FMLA */
+                read_vec_element_i32(s, tcg_res, rd, pass, MO_16);
+                gen_helper_advsimd_muladdh(tcg_res, tcg_op1, tcg_op2, tcg_res,
+                                           fpst);
+                break;
+            case 0x2: /* FADD */
+                gen_helper_advsimd_addh(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x3: /* FMULX */
+                gen_helper_advsimd_mulxh(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x4: /* FCMEQ */
+                gen_helper_advsimd_ceq_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x6: /* FMAX */
+                gen_helper_advsimd_maxh(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x7: /* FRECPS */
+                gen_helper_recpsf_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x8: /* FMINNM */
+                gen_helper_advsimd_minnumh(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x9: /* FMLS */
+                /* As usual for ARM, separate negation for fused multiply-add */
+                tcg_gen_xori_i32(tcg_op1, tcg_op1, 0x8000);
+                read_vec_element_i32(s, tcg_res, rd, pass, MO_16);
+                gen_helper_advsimd_muladdh(tcg_res, tcg_op1, tcg_op2, tcg_res,
+                                           fpst);
+                break;
+            case 0xa: /* FSUB */
+                gen_helper_advsimd_subh(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0xe: /* FMIN */
+                gen_helper_advsimd_minh(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0xf: /* FRSQRTS */
+                gen_helper_rsqrtsf_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x13: /* FMUL */
+                gen_helper_advsimd_mulh(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x14: /* FCMGE */
+                gen_helper_advsimd_cge_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x15: /* FACGE */
+                gen_helper_advsimd_acge_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x17: /* FDIV */
+                gen_helper_advsimd_divh(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x1a: /* FABD */
+                gen_helper_advsimd_subh(tcg_res, tcg_op1, tcg_op2, fpst);
+                tcg_gen_andi_i32(tcg_res, tcg_res, 0x7fff);
+                break;
+            case 0x1c: /* FCMGT */
+                gen_helper_advsimd_cgt_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x1d: /* FACGT */
+                gen_helper_advsimd_acgt_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            default:
+                fprintf(stderr, "%s: insn %#04x, fpop %#2x @ %#" PRIx64 "\n",
+                        __func__, insn, fpopcode, s->pc);
+                g_assert_not_reached();
+            }
+
+            write_vec_element_i32(s, tcg_res, rd, pass, MO_16);
+            tcg_temp_free_i32(tcg_res);
+            tcg_temp_free_i32(tcg_op1);
+            tcg_temp_free_i32(tcg_op2);
+        }
     }
 
     tcg_temp_free_ptr(fpst);
-- 
2.16.2

[Qemu-devel] [PULL 22/42] arm/translate-a64: add FP16 FMULX/MLS/FMLA to simd_indexed

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

The helpers use the new re-factored muladd support in SoftFloat for
the float16 work.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20180227143852.11175-15-alex.bennee@linaro.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/translate-a64.c | 82 +++++++++++++++++++++++++++++++++++++---------
 1 file changed, 66 insertions(+), 16 deletions(-)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index e96e6cdd15..6a264bc134 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -11198,6 +11198,7 @@ static void disas_simd_indexed(DisasContext *s, uint32_t insn)
     int rd = extract32(insn, 0, 5);
     bool is_long = false;
     bool is_fp = false;
+    bool is_fp16 = false;
     int index;
     TCGv_ptr fpst;
 
@@ -11244,7 +11245,7 @@ static void disas_simd_indexed(DisasContext *s, uint32_t insn)
         }
         /* fall through */
     case 0x9: /* FMUL, FMULX */
-        if (!extract32(size, 1, 1)) {
+        if (size == 1) {
             unallocated_encoding(s);
             return;
         }
@@ -11256,18 +11257,34 @@ static void disas_simd_indexed(DisasContext *s, uint32_t insn)
     }
 
     if (is_fp) {
-        /* low bit of size indicates single/double */
-        size = extract32(size, 0, 1) ? 3 : 2;
-        if (size == 2) {
+        /* convert insn encoded size to TCGMemOp size */
+        switch (size) {
+        case 2: /* single precision */
+            size = MO_32;
             index = h << 1 | l;
-        } else {
+            rm |= (m << 4);
+            break;
+        case 3: /* double precision */
+            size = MO_64;
             if (l || !is_q) {
                 unallocated_encoding(s);
                 return;
             }
             index = h;
+            rm |= (m << 4);
+            break;
+        case 0: /* half precision */
+            size = MO_16;
+            index = h << 2 | l << 1 | m;
+            is_fp16 = true;
+            if (arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {
+                break;
+            }
+            /* fallthru */
+        default: /* unallocated */
+            unallocated_encoding(s);
+            return;
         }
-        rm |= (m << 4);
     } else {
         switch (size) {
         case 1:
@@ -11288,7 +11305,7 @@ static void disas_simd_indexed(DisasContext *s, uint32_t insn)
     }
 
     if (is_fp) {
-        fpst = get_fpstatus_ptr(false);
+        fpst = get_fpstatus_ptr(is_fp16);
     } else {
         fpst = NULL;
     }
@@ -11390,18 +11407,51 @@ static void disas_simd_indexed(DisasContext *s, uint32_t insn)
                 break;
             }
             case 0x5: /* FMLS */
-                /* As usual for ARM, separate negation for fused multiply-add */
-                gen_helper_vfp_negs(tcg_op, tcg_op);
-                /* fall through */
             case 0x1: /* FMLA */
-                read_vec_element_i32(s, tcg_res, rd, pass, MO_32);
-                gen_helper_vfp_muladds(tcg_res, tcg_op, tcg_idx, tcg_res, fpst);
+                read_vec_element_i32(s, tcg_res, rd, pass,
+                                     is_scalar ? size : MO_32);
+                switch (size) {
+                case 1:
+                    if (opcode == 0x5) {
+                        /* As usual for ARM, separate negation for fused
+                         * multiply-add */
+                        tcg_gen_xori_i32(tcg_op, tcg_op, 0x80008000);
+                    }
+                    gen_helper_advsimd_muladdh(tcg_res, tcg_op, tcg_idx,
+                                               tcg_res, fpst);
+                    break;
+                case 2:
+                    if (opcode == 0x5) {
+                        /* As usual for ARM, separate negation for
+                         * fused multiply-add */
+                        tcg_gen_xori_i32(tcg_op, tcg_op, 0x80000000);
+                    }
+                    gen_helper_vfp_muladds(tcg_res, tcg_op, tcg_idx,
+                                           tcg_res, fpst);
+                    break;
+                default:
+                    g_assert_not_reached();
+                }
                 break;
             case 0x9: /* FMUL, FMULX */
-                if (u) {
-                    gen_helper_vfp_mulxs(tcg_res, tcg_op, tcg_idx, fpst);
-                } else {
-                    gen_helper_vfp_muls(tcg_res, tcg_op, tcg_idx, fpst);
+                switch (size) {
+                case 1:
+                    if (u) {
+                        gen_helper_advsimd_mulxh(tcg_res, tcg_op, tcg_idx,
+                                                 fpst);
+                    } else {
+                        g_assert_not_reached();
+                    }
+                    break;
+                case 2:
+                    if (u) {
+                        gen_helper_vfp_mulxs(tcg_res, tcg_op, tcg_idx, fpst);
+                    } else {
+                        gen_helper_vfp_muls(tcg_res, tcg_op, tcg_idx, fpst);
+                    }
+                    break;
+                default:
+                    g_assert_not_reached();
                 }
                 break;
             case 0xc: /* SQDMULH */
-- 
2.16.2

[Qemu-devel] [PULL 23/42] arm/translate-a64: add FP16 x2 ops for simd_indexed

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

A bunch of the vectorised bitwise operations just operate on larger
chunks at a time. We can do the same for the new half-precision
operations by introducing some TWOHALFOP helpers which work on each
half of a pair of half-precision operations at once.

Hopefully all this hoop jumping will get simpler once we have
generically vectorised helpers here.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-16-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper-a64.h    | 10 ++++++++++
 target/arm/helper-a64.c    | 46 +++++++++++++++++++++++++++++++++++++++++++++-
 target/arm/translate-a64.c | 26 +++++++++++++++++++++-----
 3 files changed, 76 insertions(+), 6 deletions(-)

diff --git a/target/arm/helper-a64.h b/target/arm/helper-a64.h
index 79012eee9d..003ffa582f 100644
--- a/target/arm/helper-a64.h
+++ b/target/arm/helper-a64.h
@@ -65,3 +65,13 @@ DEF_HELPER_3(advsimd_acge_f16, i32, f16, f16, ptr)
 DEF_HELPER_3(advsimd_acgt_f16, i32, f16, f16, ptr)
 DEF_HELPER_3(advsimd_mulxh, f16, f16, f16, ptr)
 DEF_HELPER_4(advsimd_muladdh, f16, f16, f16, f16, ptr)
+DEF_HELPER_3(advsimd_add2h, i32, i32, i32, ptr)
+DEF_HELPER_3(advsimd_sub2h, i32, i32, i32, ptr)
+DEF_HELPER_3(advsimd_mul2h, i32, i32, i32, ptr)
+DEF_HELPER_3(advsimd_div2h, i32, i32, i32, ptr)
+DEF_HELPER_3(advsimd_max2h, i32, i32, i32, ptr)
+DEF_HELPER_3(advsimd_min2h, i32, i32, i32, ptr)
+DEF_HELPER_3(advsimd_maxnum2h, i32, i32, i32, ptr)
+DEF_HELPER_3(advsimd_minnum2h, i32, i32, i32, ptr)
+DEF_HELPER_3(advsimd_mulx2h, i32, i32, i32, ptr)
+DEF_HELPER_4(advsimd_muladd2h, i32, i32, i32, i32, ptr)
diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
index 8fdbe034f3..4d5ae96d8f 100644
--- a/target/arm/helper-a64.c
+++ b/target/arm/helper-a64.c
@@ -629,8 +629,32 @@ ADVSIMD_HALFOP(max)
 ADVSIMD_HALFOP(minnum)
 ADVSIMD_HALFOP(maxnum)
 
+#define ADVSIMD_TWOHALFOP(name)                                         \
+uint32_t ADVSIMD_HELPER(name, 2h)(uint32_t two_a, uint32_t two_b, void *fpstp) \
+{ \
+    float16  a1, a2, b1, b2;                        \
+    uint32_t r1, r2;                                \
+    float_status *fpst = fpstp;                     \
+    a1 = extract32(two_a, 0, 16);                   \
+    a2 = extract32(two_a, 16, 16);                  \
+    b1 = extract32(two_b, 0, 16);                   \
+    b2 = extract32(two_b, 16, 16);                  \
+    r1 = float16_ ## name(a1, b1, fpst);            \
+    r2 = float16_ ## name(a2, b2, fpst);            \
+    return deposit32(r1, 16, 16, r2);               \
+}
+
+ADVSIMD_TWOHALFOP(add)
+ADVSIMD_TWOHALFOP(sub)
+ADVSIMD_TWOHALFOP(mul)
+ADVSIMD_TWOHALFOP(div)
+ADVSIMD_TWOHALFOP(min)
+ADVSIMD_TWOHALFOP(max)
+ADVSIMD_TWOHALFOP(minnum)
+ADVSIMD_TWOHALFOP(maxnum)
+
 /* Data processing - scalar floating-point and advanced SIMD */
-float16 HELPER(advsimd_mulxh)(float16 a, float16 b, void *fpstp)
+static float16 float16_mulx(float16 a, float16 b, void *fpstp)
 {
     float_status *fpst = fpstp;
 
@@ -646,6 +670,9 @@ float16 HELPER(advsimd_mulxh)(float16 a, float16 b, void *fpstp)
     return float16_mul(a, b, fpst);
 }
 
+ADVSIMD_HALFOP(mulx)
+ADVSIMD_TWOHALFOP(mulx)
+
 /* fused multiply-accumulate */
 float16 HELPER(advsimd_muladdh)(float16 a, float16 b, float16 c, void *fpstp)
 {
@@ -653,6 +680,23 @@ float16 HELPER(advsimd_muladdh)(float16 a, float16 b, float16 c, void *fpstp)
     return float16_muladd(a, b, c, 0, fpst);
 }
 
+uint32_t HELPER(advsimd_muladd2h)(uint32_t two_a, uint32_t two_b,
+                                  uint32_t two_c, void *fpstp)
+{
+    float_status *fpst = fpstp;
+    float16  a1, a2, b1, b2, c1, c2;
+    uint32_t r1, r2;
+    a1 = extract32(two_a, 0, 16);
+    a2 = extract32(two_a, 16, 16);
+    b1 = extract32(two_b, 0, 16);
+    b2 = extract32(two_b, 16, 16);
+    c1 = extract32(two_c, 0, 16);
+    c2 = extract32(two_c, 16, 16);
+    r1 = float16_muladd(a1, b1, c1, 0, fpst);
+    r2 = float16_muladd(a2, b2, c2, 0, fpst);
+    return deposit32(r1, 16, 16, r2);
+}
+
 /*
  * Floating point comparisons produce an integer result. Softfloat
  * routines return float_relation types which we convert to the 0/-1
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 6a264bc134..3487c0430f 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -11417,8 +11417,13 @@ static void disas_simd_indexed(DisasContext *s, uint32_t insn)
                          * multiply-add */
                         tcg_gen_xori_i32(tcg_op, tcg_op, 0x80008000);
                     }
-                    gen_helper_advsimd_muladdh(tcg_res, tcg_op, tcg_idx,
-                                               tcg_res, fpst);
+                    if (is_scalar) {
+                        gen_helper_advsimd_muladdh(tcg_res, tcg_op, tcg_idx,
+                                                   tcg_res, fpst);
+                    } else {
+                        gen_helper_advsimd_muladd2h(tcg_res, tcg_op, tcg_idx,
+                                                    tcg_res, fpst);
+                    }
                     break;
                 case 2:
                     if (opcode == 0x5) {
@@ -11437,10 +11442,21 @@ static void disas_simd_indexed(DisasContext *s, uint32_t insn)
                 switch (size) {
                 case 1:
                     if (u) {
-                        gen_helper_advsimd_mulxh(tcg_res, tcg_op, tcg_idx,
-                                                 fpst);
+                        if (is_scalar) {
+                            gen_helper_advsimd_mulxh(tcg_res, tcg_op,
+                                                     tcg_idx, fpst);
+                        } else {
+                            gen_helper_advsimd_mulx2h(tcg_res, tcg_op,
+                                                      tcg_idx, fpst);
+                        }
                     } else {
-                        g_assert_not_reached();
+                        if (is_scalar) {
+                            gen_helper_advsimd_mulh(tcg_res, tcg_op,
+                                                    tcg_idx, fpst);
+                        } else {
+                            gen_helper_advsimd_mul2h(tcg_res, tcg_op,
+                                                     tcg_idx, fpst);
+                        }
                     }
                     break;
                 case 2:
-- 
2.16.2

[Qemu-devel] [PULL 24/42] arm/translate-a64: initial decode for simd_two_reg_misc_fp16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

This actually covers two different sections of the encoding table:

   Advanced SIMD scalar two-register miscellaneous FP16
   Advanced SIMD two-register miscellaneous (FP16)

The difference between the two is covered by a combination of Q (bit
30) and S (bit 28). Notably the FRINTx instructions are only
available in the vector form.

This is just the decode skeleton which will be filled out by later
patches.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-17-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/translate-a64.c | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 3487c0430f..9c1892c49a 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -11164,6 +11164,45 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
     }
 }
 
+/* AdvSIMD [scalar] two register miscellaneous (FP16)
+ *
+ *   31  30  29 28  27     24  23 22 21       17 16    12 11 10 9    5 4    0
+ * +---+---+---+---+---------+---+-------------+--------+-----+------+------+
+ * | 0 | Q | U | S | 1 1 1 0 | a | 1 1 1 1 0 0 | opcode | 1 0 |  Rn  |  Rd  |
+ * +---+---+---+---+---------+---+-------------+--------+-----+------+------+
+ *   mask: 1000 1111 0111 1110 0000 1100 0000 0000 0x8f7e 0c00
+ *   val:  0000 1110 0111 1000 0000 1000 0000 0000 0x0e78 0800
+ *
+ * This actually covers two groups where scalar access is governed by
+ * bit 28. A bunch of the instructions (float to integral) only exist
+ * in the vector form and are un-allocated for the scalar decode. Also
+ * in the scalar decode Q is always 1.
+ */
+static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
+{
+    int fpop, opcode, a;
+
+    if (!arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {
+        unallocated_encoding(s);
+        return;
+    }
+
+    if (!fp_access_check(s)) {
+        return;
+    }
+
+    opcode = extract32(insn, 12, 4);
+    a = extract32(insn, 23, 1);
+    fpop = deposit32(opcode, 5, 1, a);
+
+    switch (fpop) {
+    default:
+        fprintf(stderr, "%s: insn %#04x fpop %#2x\n", __func__, insn, fpop);
+        g_assert_not_reached();
+    }
+
+}
+
 /* AdvSIMD scalar x indexed element
  *  31 30  29 28       24 23  22 21  20  19  16 15 12  11  10 9    5 4    0
  * +-----+---+-----------+------+---+---+------+-----+---+---+------+------+
@@ -12236,6 +12275,7 @@ static const AArch64DecodeTable data_proc_simd[] = {
     { 0xce800000, 0xffe00000, disas_crypto_xar },
     { 0xce408000, 0xffe0c000, disas_crypto_three_reg_imm2 },
     { 0x0e400400, 0x9f60c400, disas_simd_three_reg_same_fp16 },
+    { 0x0e780800, 0x8f7e0c00, disas_simd_two_reg_misc_fp16 },
     { 0x00000000, 0x00000000, NULL }
 };
 
-- 
2.16.2

[Qemu-devel] [PULL 25/42] arm/translate-a64: add FP16 FPRINTx to simd_two_reg_misc_fp16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

This adds the full range of half-precision floating point to integral
instructions.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-18-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper-a64.h    |   2 +
 target/arm/helper-a64.c    |  22 ++++++++
 target/arm/translate-a64.c | 123 +++++++++++++++++++++++++++++++++++++++++++--
 3 files changed, 142 insertions(+), 5 deletions(-)

diff --git a/target/arm/helper-a64.h b/target/arm/helper-a64.h
index 003ffa582f..bc8d5b105b 100644
--- a/target/arm/helper-a64.h
+++ b/target/arm/helper-a64.h
@@ -75,3 +75,5 @@ DEF_HELPER_3(advsimd_maxnum2h, i32, i32, i32, ptr)
 DEF_HELPER_3(advsimd_minnum2h, i32, i32, i32, ptr)
 DEF_HELPER_3(advsimd_mulx2h, i32, i32, i32, ptr)
 DEF_HELPER_4(advsimd_muladd2h, i32, i32, i32, i32, ptr)
+DEF_HELPER_2(advsimd_rinth_exact, f16, f16, ptr)
+DEF_HELPER_2(advsimd_rinth, f16, f16, ptr)
diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
index 4d5ae96d8f..4fd28fdf48 100644
--- a/target/arm/helper-a64.c
+++ b/target/arm/helper-a64.c
@@ -745,3 +745,25 @@ uint32_t HELPER(advsimd_acgt_f16)(float16 a, float16 b, void *fpstp)
     int compare = float16_compare(f0, f1, fpst);
     return ADVSIMD_CMPRES(compare == float_relation_greater);
 }
+
+/* round to integral */
+float16 HELPER(advsimd_rinth_exact)(float16 x, void *fp_status)
+{
+    return float16_round_to_int(x, fp_status);
+}
+
+float16 HELPER(advsimd_rinth)(float16 x, void *fp_status)
+{
+    int old_flags = get_float_exception_flags(fp_status), new_flags;
+    float16 ret;
+
+    ret = float16_round_to_int(x, fp_status);
+
+    /* Suppress any inexact exceptions the conversion produced */
+    if (!(old_flags & float_flag_inexact)) {
+        new_flags = get_float_exception_flags(fp_status);
+        set_float_exception_flags(new_flags & ~float_flag_inexact, fp_status);
+    }
+
+    return ret;
+}
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 9c1892c49a..3c37eb99ff 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -11180,27 +11180,140 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
  */
 static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
 {
-    int fpop, opcode, a;
+    int fpop, opcode, a, u;
+    int rn, rd;
+    bool is_q;
+    bool is_scalar;
+    bool only_in_vector = false;
+
+    int pass;
+    TCGv_i32 tcg_rmode = NULL;
+    TCGv_ptr tcg_fpstatus = NULL;
+    bool need_rmode = false;
+    int rmode;
 
     if (!arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {
         unallocated_encoding(s);
         return;
     }
 
-    if (!fp_access_check(s)) {
-        return;
-    }
+    rd = extract32(insn, 0, 5);
+    rn = extract32(insn, 5, 5);
 
-    opcode = extract32(insn, 12, 4);
     a = extract32(insn, 23, 1);
+    u = extract32(insn, 29, 1);
+    is_scalar = extract32(insn, 28, 1);
+    is_q = extract32(insn, 30, 1);
+
+    opcode = extract32(insn, 12, 5);
     fpop = deposit32(opcode, 5, 1, a);
+    fpop = deposit32(fpop, 6, 1, u);
 
     switch (fpop) {
+    case 0x18: /* FRINTN */
+        need_rmode = true;
+        only_in_vector = true;
+        rmode = FPROUNDING_TIEEVEN;
+        break;
+    case 0x19: /* FRINTM */
+        need_rmode = true;
+        only_in_vector = true;
+        rmode = FPROUNDING_NEGINF;
+        break;
+    case 0x38: /* FRINTP */
+        need_rmode = true;
+        only_in_vector = true;
+        rmode = FPROUNDING_POSINF;
+        break;
+    case 0x39: /* FRINTZ */
+        need_rmode = true;
+        only_in_vector = true;
+        rmode = FPROUNDING_ZERO;
+        break;
+    case 0x58: /* FRINTA */
+        need_rmode = true;
+        only_in_vector = true;
+        rmode = FPROUNDING_TIEAWAY;
+        break;
+    case 0x59: /* FRINTX */
+    case 0x79: /* FRINTI */
+        only_in_vector = true;
+        /* current rounding mode */
+        break;
     default:
         fprintf(stderr, "%s: insn %#04x fpop %#2x\n", __func__, insn, fpop);
         g_assert_not_reached();
     }
 
+
+    /* Check additional constraints for the scalar encoding */
+    if (is_scalar) {
+        if (!is_q) {
+            unallocated_encoding(s);
+            return;
+        }
+        /* FRINTxx is only in the vector form */
+        if (only_in_vector) {
+            unallocated_encoding(s);
+            return;
+        }
+    }
+
+    if (!fp_access_check(s)) {
+        return;
+    }
+
+    if (need_rmode) {
+        tcg_fpstatus = get_fpstatus_ptr(true);
+    }
+
+    if (need_rmode) {
+        tcg_rmode = tcg_const_i32(arm_rmode_to_sf(rmode));
+        gen_helper_set_rmode(tcg_rmode, tcg_rmode, tcg_fpstatus);
+    }
+
+    if (is_scalar) {
+        /* no operations yet */
+    } else {
+        for (pass = 0; pass < (is_q ? 8 : 4); pass++) {
+            TCGv_i32 tcg_op = tcg_temp_new_i32();
+            TCGv_i32 tcg_res = tcg_temp_new_i32();
+
+            read_vec_element_i32(s, tcg_op, rn, pass, MO_16);
+
+            switch (fpop) {
+            case 0x18: /* FRINTN */
+            case 0x19: /* FRINTM */
+            case 0x38: /* FRINTP */
+            case 0x39: /* FRINTZ */
+            case 0x58: /* FRINTA */
+            case 0x79: /* FRINTI */
+                gen_helper_advsimd_rinth(tcg_res, tcg_op, tcg_fpstatus);
+                break;
+            case 0x59: /* FRINTX */
+                gen_helper_advsimd_rinth_exact(tcg_res, tcg_op, tcg_fpstatus);
+                break;
+            default:
+                g_assert_not_reached();
+            }
+
+            write_vec_element_i32(s, tcg_res, rd, pass, MO_16);
+
+            tcg_temp_free_i32(tcg_res);
+            tcg_temp_free_i32(tcg_op);
+        }
+
+        clear_vec_high(s, is_q, rd);
+    }
+
+    if (tcg_rmode) {
+        gen_helper_set_rmode(tcg_rmode, tcg_rmode, tcg_fpstatus);
+        tcg_temp_free_i32(tcg_rmode);
+    }
+
+    if (tcg_fpstatus) {
+        tcg_temp_free_ptr(tcg_fpstatus);
+    }
 }
 
 /* AdvSIMD scalar x indexed element
-- 
2.16.2

[Qemu-devel] [PULL 26/42] arm/translate-a64: add FCVTxx to simd_two_reg_misc_fp16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

This covers all the floating point convert operations.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-19-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper-a64.h    |  2 ++
 target/arm/helper-a64.c    | 32 +++++++++++++++++
 target/arm/translate-a64.c | 85 +++++++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 118 insertions(+), 1 deletion(-)

diff --git a/target/arm/helper-a64.h b/target/arm/helper-a64.h
index bc8d5b105b..32931b17c6 100644
--- a/target/arm/helper-a64.h
+++ b/target/arm/helper-a64.h
@@ -77,3 +77,5 @@ DEF_HELPER_3(advsimd_mulx2h, i32, i32, i32, ptr)
 DEF_HELPER_4(advsimd_muladd2h, i32, i32, i32, i32, ptr)
 DEF_HELPER_2(advsimd_rinth_exact, f16, f16, ptr)
 DEF_HELPER_2(advsimd_rinth, f16, f16, ptr)
+DEF_HELPER_2(advsimd_f16tosinth, i32, f16, ptr)
+DEF_HELPER_2(advsimd_f16touinth, i32, f16, ptr)
diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
index 4fd28fdf48..722fff2349 100644
--- a/target/arm/helper-a64.c
+++ b/target/arm/helper-a64.c
@@ -767,3 +767,35 @@ float16 HELPER(advsimd_rinth)(float16 x, void *fp_status)
 
     return ret;
 }
+
+/*
+ * Half-precision floating point conversion functions
+ *
+ * There are a multitude of conversion functions with various
+ * different rounding modes. This is dealt with by the calling code
+ * setting the mode appropriately before calling the helper.
+ */
+
+uint32_t HELPER(advsimd_f16tosinth)(float16 a, void *fpstp)
+{
+    float_status *fpst = fpstp;
+
+    /* Invalid if we are passed a NaN */
+    if (float16_is_any_nan(a)) {
+        float_raise(float_flag_invalid, fpst);
+        return 0;
+    }
+    return float16_to_int16(a, fpst);
+}
+
+uint32_t HELPER(advsimd_f16touinth)(float16 a, void *fpstp)
+{
+    float_status *fpst = fpstp;
+
+    /* Invalid if we are passed a NaN */
+    if (float16_is_any_nan(a)) {
+        float_raise(float_flag_invalid, fpst);
+        return 0;
+    }
+    return float16_to_uint16(a, fpst);
+}
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 3c37eb99ff..046079b1b3 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -11240,6 +11240,46 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
         only_in_vector = true;
         /* current rounding mode */
         break;
+    case 0x1a: /* FCVTNS */
+        need_rmode = true;
+        rmode = FPROUNDING_TIEEVEN;
+        break;
+    case 0x1b: /* FCVTMS */
+        need_rmode = true;
+        rmode = FPROUNDING_NEGINF;
+        break;
+    case 0x1c: /* FCVTAS */
+        need_rmode = true;
+        rmode = FPROUNDING_TIEAWAY;
+        break;
+    case 0x3a: /* FCVTPS */
+        need_rmode = true;
+        rmode = FPROUNDING_POSINF;
+        break;
+    case 0x3b: /* FCVTZS */
+        need_rmode = true;
+        rmode = FPROUNDING_ZERO;
+        break;
+    case 0x5a: /* FCVTNU */
+        need_rmode = true;
+        rmode = FPROUNDING_TIEEVEN;
+        break;
+    case 0x5b: /* FCVTMU */
+        need_rmode = true;
+        rmode = FPROUNDING_NEGINF;
+        break;
+    case 0x5c: /* FCVTAU */
+        need_rmode = true;
+        rmode = FPROUNDING_TIEAWAY;
+        break;
+    case 0x7a: /* FCVTPU */
+        need_rmode = true;
+        rmode = FPROUNDING_POSINF;
+        break;
+    case 0x7b: /* FCVTZU */
+        need_rmode = true;
+        rmode = FPROUNDING_ZERO;
+        break;
     default:
         fprintf(stderr, "%s: insn %#04x fpop %#2x\n", __func__, insn, fpop);
         g_assert_not_reached();
@@ -11273,7 +11313,36 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
     }
 
     if (is_scalar) {
-        /* no operations yet */
+        TCGv_i32 tcg_op = tcg_temp_new_i32();
+        TCGv_i32 tcg_res = tcg_temp_new_i32();
+
+        read_vec_element_i32(s, tcg_op, rn, 0, MO_16);
+
+        switch (fpop) {
+        case 0x1a: /* FCVTNS */
+        case 0x1b: /* FCVTMS */
+        case 0x1c: /* FCVTAS */
+        case 0x3a: /* FCVTPS */
+        case 0x3b: /* FCVTZS */
+            gen_helper_advsimd_f16tosinth(tcg_res, tcg_op, tcg_fpstatus);
+            break;
+        case 0x5a: /* FCVTNU */
+        case 0x5b: /* FCVTMU */
+        case 0x5c: /* FCVTAU */
+        case 0x7a: /* FCVTPU */
+        case 0x7b: /* FCVTZU */
+            gen_helper_advsimd_f16touinth(tcg_res, tcg_op, tcg_fpstatus);
+            break;
+        default:
+            g_assert_not_reached();
+        }
+
+        /* limit any sign extension going on */
+        tcg_gen_andi_i32(tcg_res, tcg_res, 0xffff);
+        write_fp_sreg(s, rd, tcg_res);
+
+        tcg_temp_free_i32(tcg_res);
+        tcg_temp_free_i32(tcg_op);
     } else {
         for (pass = 0; pass < (is_q ? 8 : 4); pass++) {
             TCGv_i32 tcg_op = tcg_temp_new_i32();
@@ -11282,6 +11351,20 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
             read_vec_element_i32(s, tcg_op, rn, pass, MO_16);
 
             switch (fpop) {
+            case 0x1a: /* FCVTNS */
+            case 0x1b: /* FCVTMS */
+            case 0x1c: /* FCVTAS */
+            case 0x3a: /* FCVTPS */
+            case 0x3b: /* FCVTZS */
+                gen_helper_advsimd_f16tosinth(tcg_res, tcg_op, tcg_fpstatus);
+                break;
+            case 0x5a: /* FCVTNU */
+            case 0x5b: /* FCVTMU */
+            case 0x5c: /* FCVTAU */
+            case 0x7a: /* FCVTPU */
+            case 0x7b: /* FCVTZU */
+                gen_helper_advsimd_f16touinth(tcg_res, tcg_op, tcg_fpstatus);
+                break;
             case 0x18: /* FRINTN */
             case 0x19: /* FRINTM */
             case 0x38: /* FRINTP */
-- 
2.16.2

[Qemu-devel] [PULL 27/42] arm/translate-a64: add FP16 FCMxx (zero) to simd_two_reg_misc_fp16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

I re-use the existing handle_2misc_fcmp_zero handler and tweak it
slightly to deal with the half-precision case.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-20-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/translate-a64.c | 80 +++++++++++++++++++++++++++++++++-------------
 1 file changed, 57 insertions(+), 23 deletions(-)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 046079b1b3..9c02f1e23c 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -7821,14 +7821,14 @@ static void handle_2misc_fcmp_zero(DisasContext *s, int opcode,
                                    bool is_scalar, bool is_u, bool is_q,
                                    int size, int rn, int rd)
 {
-    bool is_double = (size == 3);
+    bool is_double = (size == MO_64);
     TCGv_ptr fpst;
 
     if (!fp_access_check(s)) {
         return;
     }
 
-    fpst = get_fpstatus_ptr(false);
+    fpst = get_fpstatus_ptr(size == MO_16);
 
     if (is_double) {
         TCGv_i64 tcg_op = tcg_temp_new_i64();
@@ -7880,34 +7880,57 @@ static void handle_2misc_fcmp_zero(DisasContext *s, int opcode,
         bool swap = false;
         int pass, maxpasses;
 
-        switch (opcode) {
-        case 0x2e: /* FCMLT (zero) */
-            swap = true;
-            /* fall through */
-        case 0x2c: /* FCMGT (zero) */
-            genfn = gen_helper_neon_cgt_f32;
-            break;
-        case 0x2d: /* FCMEQ (zero) */
-            genfn = gen_helper_neon_ceq_f32;
-            break;
-        case 0x6d: /* FCMLE (zero) */
-            swap = true;
-            /* fall through */
-        case 0x6c: /* FCMGE (zero) */
-            genfn = gen_helper_neon_cge_f32;
-            break;
-        default:
-            g_assert_not_reached();
+        if (size == MO_16) {
+            switch (opcode) {
+            case 0x2e: /* FCMLT (zero) */
+                swap = true;
+                /* fall through */
+            case 0x2c: /* FCMGT (zero) */
+                genfn = gen_helper_advsimd_cgt_f16;
+                break;
+            case 0x2d: /* FCMEQ (zero) */
+                genfn = gen_helper_advsimd_ceq_f16;
+                break;
+            case 0x6d: /* FCMLE (zero) */
+                swap = true;
+                /* fall through */
+            case 0x6c: /* FCMGE (zero) */
+                genfn = gen_helper_advsimd_cge_f16;
+                break;
+            default:
+                g_assert_not_reached();
+            }
+        } else {
+            switch (opcode) {
+            case 0x2e: /* FCMLT (zero) */
+                swap = true;
+                /* fall through */
+            case 0x2c: /* FCMGT (zero) */
+                genfn = gen_helper_neon_cgt_f32;
+                break;
+            case 0x2d: /* FCMEQ (zero) */
+                genfn = gen_helper_neon_ceq_f32;
+                break;
+            case 0x6d: /* FCMLE (zero) */
+                swap = true;
+                /* fall through */
+            case 0x6c: /* FCMGE (zero) */
+                genfn = gen_helper_neon_cge_f32;
+                break;
+            default:
+                g_assert_not_reached();
+            }
         }
 
         if (is_scalar) {
             maxpasses = 1;
         } else {
-            maxpasses = is_q ? 4 : 2;
+            int vector_size = 8 << is_q;
+            maxpasses = vector_size >> size;
         }
 
         for (pass = 0; pass < maxpasses; pass++) {
-            read_vec_element_i32(s, tcg_op, rn, pass, MO_32);
+            read_vec_element_i32(s, tcg_op, rn, pass, size);
             if (swap) {
                 genfn(tcg_res, tcg_zero, tcg_op, fpst);
             } else {
@@ -7916,7 +7939,7 @@ static void handle_2misc_fcmp_zero(DisasContext *s, int opcode,
             if (is_scalar) {
                 write_fp_sreg(s, rd, tcg_res);
             } else {
-                write_vec_element_i32(s, tcg_res, rd, pass, MO_32);
+                write_vec_element_i32(s, tcg_res, rd, pass, size);
             }
         }
         tcg_temp_free_i32(tcg_res);
@@ -11209,7 +11232,18 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
     fpop = deposit32(opcode, 5, 1, a);
     fpop = deposit32(fpop, 6, 1, u);
 
+    rd = extract32(insn, 0, 5);
+    rn = extract32(insn, 5, 5);
+
     switch (fpop) {
+    break;
+    case 0x2c: /* FCMGT (zero) */
+    case 0x2d: /* FCMEQ (zero) */
+    case 0x2e: /* FCMLT (zero) */
+    case 0x6c: /* FCMGE (zero) */
+    case 0x6d: /* FCMLE (zero) */
+        handle_2misc_fcmp_zero(s, fpop, is_scalar, 0, is_q, MO_16, rn, rd);
+        return;
     case 0x18: /* FRINTN */
         need_rmode = true;
         only_in_vector = true;
-- 
2.16.2

[Qemu-devel] [PULL 28/42] arm/translate-a64: add FP16 SCVTF/UCVFT to simd_two_reg_misc_fp16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

I've re-factored the handle_simd_intfp_conv helper to properly handle
half-precision as well as call plain conversion helpers when we are
not doing fixed point conversion.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-21-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper.h        |  10 ++++
 target/arm/helper.c        |   4 ++
 target/arm/translate-a64.c | 122 ++++++++++++++++++++++++++++++++++-----------
 3 files changed, 108 insertions(+), 28 deletions(-)

diff --git a/target/arm/helper.h b/target/arm/helper.h
index 81ecb319b3..c0f35592ff 100644
--- a/target/arm/helper.h
+++ b/target/arm/helper.h
@@ -120,17 +120,23 @@ DEF_HELPER_3(vfp_cmped, void, f64, f64, env)
 DEF_HELPER_2(vfp_fcvtds, f64, f32, env)
 DEF_HELPER_2(vfp_fcvtsd, f32, f64, env)
 
+DEF_HELPER_2(vfp_uitoh, f16, i32, ptr)
 DEF_HELPER_2(vfp_uitos, f32, i32, ptr)
 DEF_HELPER_2(vfp_uitod, f64, i32, ptr)
+DEF_HELPER_2(vfp_sitoh, f16, i32, ptr)
 DEF_HELPER_2(vfp_sitos, f32, i32, ptr)
 DEF_HELPER_2(vfp_sitod, f64, i32, ptr)
 
+DEF_HELPER_2(vfp_touih, i32, f16, ptr)
 DEF_HELPER_2(vfp_touis, i32, f32, ptr)
 DEF_HELPER_2(vfp_touid, i32, f64, ptr)
+DEF_HELPER_2(vfp_touizh, i32, f16, ptr)
 DEF_HELPER_2(vfp_touizs, i32, f32, ptr)
 DEF_HELPER_2(vfp_touizd, i32, f64, ptr)
+DEF_HELPER_2(vfp_tosih, i32, f16, ptr)
 DEF_HELPER_2(vfp_tosis, i32, f32, ptr)
 DEF_HELPER_2(vfp_tosid, i32, f64, ptr)
+DEF_HELPER_2(vfp_tosizh, i32, f16, ptr)
 DEF_HELPER_2(vfp_tosizs, i32, f32, ptr)
 DEF_HELPER_2(vfp_tosizd, i32, f64, ptr)
 
@@ -142,6 +148,8 @@ DEF_HELPER_3(vfp_toshd_round_to_zero, i64, f64, i32, ptr)
 DEF_HELPER_3(vfp_tosld_round_to_zero, i64, f64, i32, ptr)
 DEF_HELPER_3(vfp_touhd_round_to_zero, i64, f64, i32, ptr)
 DEF_HELPER_3(vfp_tould_round_to_zero, i64, f64, i32, ptr)
+DEF_HELPER_3(vfp_toulh, i32, f16, i32, ptr)
+DEF_HELPER_3(vfp_toslh, i32, f16, i32, ptr)
 DEF_HELPER_3(vfp_toshs, i32, f32, i32, ptr)
 DEF_HELPER_3(vfp_tosls, i32, f32, i32, ptr)
 DEF_HELPER_3(vfp_tosqs, i64, f32, i32, ptr)
@@ -166,6 +174,8 @@ DEF_HELPER_3(vfp_sqtod, f64, i64, i32, ptr)
 DEF_HELPER_3(vfp_uhtod, f64, i64, i32, ptr)
 DEF_HELPER_3(vfp_ultod, f64, i64, i32, ptr)
 DEF_HELPER_3(vfp_uqtod, f64, i64, i32, ptr)
+DEF_HELPER_3(vfp_sltoh, f16, i32, i32, ptr)
+DEF_HELPER_3(vfp_ultoh, f16, i32, i32, ptr)
 
 DEF_HELPER_FLAGS_2(set_rmode, TCG_CALL_NO_RWG, i32, i32, ptr)
 DEF_HELPER_FLAGS_2(set_neon_rmode, TCG_CALL_NO_RWG, i32, i32, env)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 303cd1eaf9..6e3dadb754 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -11302,8 +11302,10 @@ CONV_ITOF(vfp_##name##to##p, fsz, sign) \
 CONV_FTOI(vfp_to##name##p, fsz, sign, ) \
 CONV_FTOI(vfp_to##name##z##p, fsz, sign, _round_to_zero)
 
+FLOAT_CONVS(si, h, 16, )
 FLOAT_CONVS(si, s, 32, )
 FLOAT_CONVS(si, d, 64, )
+FLOAT_CONVS(ui, h, 16, u)
 FLOAT_CONVS(ui, s, 32, u)
 FLOAT_CONVS(ui, d, 64, u)
 
@@ -11386,6 +11388,8 @@ VFP_CONV_FIX_A64(sq, s, 32, 64, int64)
 VFP_CONV_FIX(uh, s, 32, 32, uint16)
 VFP_CONV_FIX(ul, s, 32, 32, uint32)
 VFP_CONV_FIX_A64(uq, s, 32, 64, uint64)
+VFP_CONV_FIX_A64(sl, h, 16, 32, int32)
+VFP_CONV_FIX_A64(ul, h, 16, 32, uint32)
 #undef VFP_CONV_FIX
 #undef VFP_CONV_FIX_FLOAT
 #undef VFP_CONV_FLOAT_FIX_ROUND
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 9c02f1e23c..6f33783a11 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -6902,23 +6902,28 @@ static void handle_simd_intfp_conv(DisasContext *s, int rd, int rn,
                                    int elements, int is_signed,
                                    int fracbits, int size)
 {
-    bool is_double = size == 3 ? true : false;
-    TCGv_ptr tcg_fpst = get_fpstatus_ptr(false);
-    TCGv_i32 tcg_shift = tcg_const_i32(fracbits);
-    TCGv_i64 tcg_int = tcg_temp_new_i64();
+    TCGv_ptr tcg_fpst = get_fpstatus_ptr(size == MO_16);
+    TCGv_i32 tcg_shift = NULL;
+
     TCGMemOp mop = size | (is_signed ? MO_SIGN : 0);
     int pass;
 
-    for (pass = 0; pass < elements; pass++) {
-        read_vec_element(s, tcg_int, rn, pass, mop);
+    if (fracbits || size == MO_64) {
+        tcg_shift = tcg_const_i32(fracbits);
+    }
+
+    if (size == MO_64) {
+        TCGv_i64 tcg_int64 = tcg_temp_new_i64();
+        TCGv_i64 tcg_double = tcg_temp_new_i64();
+
+        for (pass = 0; pass < elements; pass++) {
+            read_vec_element(s, tcg_int64, rn, pass, mop);
 
-        if (is_double) {
-            TCGv_i64 tcg_double = tcg_temp_new_i64();
             if (is_signed) {
-                gen_helper_vfp_sqtod(tcg_double, tcg_int,
+                gen_helper_vfp_sqtod(tcg_double, tcg_int64,
                                      tcg_shift, tcg_fpst);
             } else {
-                gen_helper_vfp_uqtod(tcg_double, tcg_int,
+                gen_helper_vfp_uqtod(tcg_double, tcg_int64,
                                      tcg_shift, tcg_fpst);
             }
             if (elements == 1) {
@@ -6926,28 +6931,72 @@ static void handle_simd_intfp_conv(DisasContext *s, int rd, int rn,
             } else {
                 write_vec_element(s, tcg_double, rd, pass, MO_64);
             }
-            tcg_temp_free_i64(tcg_double);
-        } else {
-            TCGv_i32 tcg_single = tcg_temp_new_i32();
-            if (is_signed) {
-                gen_helper_vfp_sqtos(tcg_single, tcg_int,
-                                     tcg_shift, tcg_fpst);
-            } else {
-                gen_helper_vfp_uqtos(tcg_single, tcg_int,
-                                     tcg_shift, tcg_fpst);
-            }
-            if (elements == 1) {
-                write_fp_sreg(s, rd, tcg_single);
-            } else {
-                write_vec_element_i32(s, tcg_single, rd, pass, MO_32);
-            }
-            tcg_temp_free_i32(tcg_single);
         }
+
+        tcg_temp_free_i64(tcg_int64);
+        tcg_temp_free_i64(tcg_double);
+
+    } else {
+        TCGv_i32 tcg_int32 = tcg_temp_new_i32();
+        TCGv_i32 tcg_float = tcg_temp_new_i32();
+
+        for (pass = 0; pass < elements; pass++) {
+            read_vec_element_i32(s, tcg_int32, rn, pass, mop);
+
+            switch (size) {
+            case MO_32:
+                if (fracbits) {
+                    if (is_signed) {
+                        gen_helper_vfp_sltos(tcg_float, tcg_int32,
+                                             tcg_shift, tcg_fpst);
+                    } else {
+                        gen_helper_vfp_ultos(tcg_float, tcg_int32,
+                                             tcg_shift, tcg_fpst);
+                    }
+                } else {
+                    if (is_signed) {
+                        gen_helper_vfp_sitos(tcg_float, tcg_int32, tcg_fpst);
+                    } else {
+                        gen_helper_vfp_uitos(tcg_float, tcg_int32, tcg_fpst);
+                    }
+                }
+                break;
+            case MO_16:
+                if (fracbits) {
+                    if (is_signed) {
+                        gen_helper_vfp_sltoh(tcg_float, tcg_int32,
+                                             tcg_shift, tcg_fpst);
+                    } else {
+                        gen_helper_vfp_ultoh(tcg_float, tcg_int32,
+                                             tcg_shift, tcg_fpst);
+                    }
+                } else {
+                    if (is_signed) {
+                        gen_helper_vfp_sitoh(tcg_float, tcg_int32, tcg_fpst);
+                    } else {
+                        gen_helper_vfp_uitoh(tcg_float, tcg_int32, tcg_fpst);
+                    }
+                }
+                break;
+            default:
+                g_assert_not_reached();
+            }
+
+            if (elements == 1) {
+                write_fp_sreg(s, rd, tcg_float);
+            } else {
+                write_vec_element_i32(s, tcg_float, rd, pass, size);
+            }
+        }
+
+        tcg_temp_free_i32(tcg_int32);
+        tcg_temp_free_i32(tcg_float);
     }
 
-    tcg_temp_free_i64(tcg_int);
     tcg_temp_free_ptr(tcg_fpst);
-    tcg_temp_free_i32(tcg_shift);
+    if (tcg_shift) {
+        tcg_temp_free_i32(tcg_shift);
+    }
 
     clear_vec_high(s, elements << size == 16, rd);
 }
@@ -11236,6 +11285,23 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
     rn = extract32(insn, 5, 5);
 
     switch (fpop) {
+    case 0x1d: /* SCVTF */
+    case 0x5d: /* UCVTF */
+    {
+        int elements;
+
+        if (is_scalar) {
+            elements = 1;
+        } else {
+            elements = (is_q ? 8 : 4);
+        }
+
+        if (!fp_access_check(s)) {
+            return;
+        }
+        handle_simd_intfp_conv(s, rd, rn, elements, !u, 0, MO_16);
+        return;
+    }
     break;
     case 0x2c: /* FCMGT (zero) */
     case 0x2d: /* FCMEQ (zero) */
-- 
2.16.2

[Qemu-devel] [PULL 29/42] arm/translate-a64: add FP16 FNEG/FABS to simd_two_reg_misc_fp16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

Neither of these operations alter the floating point status registers
so we can do a pure bitwise operation, either squashing any sign
bit (ABS) or inverting it (NEG).

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-22-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/translate-a64.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 6f33783a11..9f2c3682dc 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -11262,6 +11262,7 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
     TCGv_i32 tcg_rmode = NULL;
     TCGv_ptr tcg_fpstatus = NULL;
     bool need_rmode = false;
+    bool need_fpst = true;
     int rmode;
 
     if (!arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {
@@ -11380,6 +11381,10 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
         need_rmode = true;
         rmode = FPROUNDING_ZERO;
         break;
+    case 0x2f: /* FABS */
+    case 0x6f: /* FNEG */
+        need_fpst = false;
+        break;
     default:
         fprintf(stderr, "%s: insn %#04x fpop %#2x\n", __func__, insn, fpop);
         g_assert_not_reached();
@@ -11403,7 +11408,7 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
         return;
     }
 
-    if (need_rmode) {
+    if (need_rmode || need_fpst) {
         tcg_fpstatus = get_fpstatus_ptr(true);
     }
 
@@ -11433,6 +11438,9 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
         case 0x7b: /* FCVTZU */
             gen_helper_advsimd_f16touinth(tcg_res, tcg_op, tcg_fpstatus);
             break;
+        case 0x6f: /* FNEG */
+            tcg_gen_xori_i32(tcg_res, tcg_op, 0x8000);
+            break;
         default:
             g_assert_not_reached();
         }
@@ -11476,6 +11484,12 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
             case 0x59: /* FRINTX */
                 gen_helper_advsimd_rinth_exact(tcg_res, tcg_op, tcg_fpstatus);
                 break;
+            case 0x2f: /* FABS */
+                tcg_gen_andi_i32(tcg_res, tcg_op, 0x7fff);
+                break;
+            case 0x6f: /* FNEG */
+                tcg_gen_xori_i32(tcg_res, tcg_op, 0x8000);
+                break;
             default:
                 g_assert_not_reached();
             }
-- 
2.16.2

[Qemu-devel] [PULL 30/42] arm/helper.c: re-factor recpe and add recepe_f16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

It looks like the ARM ARM has simplified the pseudo code for the
calculation which is done on a fixed point 9 bit integer maths. So
while adding f16 we can also clean this up to be a little less heavy
on the floating point and just return the fractional part and leave
the calle's to do the final packing of the result.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-23-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper.h |   1 +
 target/arm/helper.c | 226 +++++++++++++++++++++++++++++-----------------------
 2 files changed, 129 insertions(+), 98 deletions(-)

diff --git a/target/arm/helper.h b/target/arm/helper.h
index c0f35592ff..81d7baed6d 100644
--- a/target/arm/helper.h
+++ b/target/arm/helper.h
@@ -192,6 +192,7 @@ DEF_HELPER_4(vfp_muladds, f32, f32, f32, f32, ptr)
 
 DEF_HELPER_3(recps_f32, f32, f32, f32, env)
 DEF_HELPER_3(rsqrts_f32, f32, f32, f32, env)
+DEF_HELPER_FLAGS_2(recpe_f16, TCG_CALL_NO_RWG, f16, f16, ptr)
 DEF_HELPER_FLAGS_2(recpe_f32, TCG_CALL_NO_RWG, f32, f32, ptr)
 DEF_HELPER_FLAGS_2(recpe_f64, TCG_CALL_NO_RWG, f64, f64, ptr)
 DEF_HELPER_FLAGS_2(rsqrte_f32, TCG_CALL_NO_RWG, f32, f32, ptr)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 6e3dadb754..e2d0ff0b4c 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -11523,80 +11523,75 @@ float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUARMState *env)
  * int->float conversions at run-time.  */
 #define float64_256 make_float64(0x4070000000000000LL)
 #define float64_512 make_float64(0x4080000000000000LL)
+#define float16_maxnorm make_float16(0x7bff)
 #define float32_maxnorm make_float32(0x7f7fffff)
 #define float64_maxnorm make_float64(0x7fefffffffffffffLL)
 
 /* Reciprocal functions
  *
  * The algorithm that must be used to calculate the estimate
- * is specified by the ARM ARM, see FPRecipEstimate()
+ * is specified by the ARM ARM, see FPRecipEstimate()/RecipEstimate
  */
 
-static float64 recip_estimate(float64 a, float_status *real_fp_status)
+/* See RecipEstimate()
+ *
+ * input is a 9 bit fixed point number
+ * input range 256 .. 511 for a number from 0.5 <= x < 1.0.
+ * result range 256 .. 511 for a number from 1.0 to 511/256.
+ */
+
+static int recip_estimate(int input)
 {
-    /* These calculations mustn't set any fp exception flags,
-     * so we use a local copy of the fp_status.
-     */
-    float_status dummy_status = *real_fp_status;
-    float_status *s = &dummy_status;
-    /* q = (int)(a * 512.0) */
-    float64 q = float64_mul(float64_512, a, s);
-    int64_t q_int = float64_to_int64_round_to_zero(q, s);
-
-    /* r = 1.0 / (((double)q + 0.5) / 512.0) */
-    q = int64_to_float64(q_int, s);
-    q = float64_add(q, float64_half, s);
-    q = float64_div(q, float64_512, s);
-    q = float64_div(float64_one, q, s);
-
-    /* s = (int)(256.0 * r + 0.5) */
-    q = float64_mul(q, float64_256, s);
-    q = float64_add(q, float64_half, s);
-    q_int = float64_to_int64_round_to_zero(q, s);
-
-    /* return (double)s / 256.0 */
-    return float64_div(int64_to_float64(q_int, s), float64_256, s);
+    int a, b, r;
+    assert(256 <= input && input < 512);
+    a = (input * 2) + 1;
+    b = (1 << 19) / a;
+    r = (b + 1) >> 1;
+    assert(256 <= r && r < 512);
+    return r;
 }
 
-/* Common wrapper to call recip_estimate */
-static float64 call_recip_estimate(float64 num, int off, float_status *fpst)
-{
-    uint64_t val64 = float64_val(num);
-    uint64_t frac = extract64(val64, 0, 52);
-    int64_t exp = extract64(val64, 52, 11);
-    uint64_t sbit;
-    float64 scaled, estimate;
+/*
+ * Common wrapper to call recip_estimate
+ *
+ * The parameters are exponent and 64 bit fraction (without implicit
+ * bit) where the binary point is nominally at bit 52. Returns a
+ * float64 which can then be rounded to the appropriate size by the
+ * callee.
+ */
 
-    /* Generate the scaled number for the estimate function */
-    if (exp == 0) {
+static uint64_t call_recip_estimate(int *exp, int exp_off, uint64_t frac)
+{
+    uint32_t scaled, estimate;
+    uint64_t result_frac;
+    int result_exp;
+
+    /* Handle sub-normals */
+    if (*exp == 0) {
         if (extract64(frac, 51, 1) == 0) {
-            exp = -1;
-            frac = extract64(frac, 0, 50) << 2;
+            *exp = -1;
+            frac <<= 2;
         } else {
-            frac = extract64(frac, 0, 51) << 1;
+            frac <<= 1;
         }
     }
 
-    /* scaled = '0' : '01111111110' : fraction<51:44> : Zeros(44); */
-    scaled = make_float64((0x3feULL << 52)
-                          | extract64(frac, 44, 8) << 44);
+    /* scaled = UInt('1':fraction<51:44>) */
+    scaled = deposit32(1 << 8, 0, 8, extract64(frac, 44, 8));
+    estimate = recip_estimate(scaled);
 
-    estimate = recip_estimate(scaled, fpst);
-
-    /* Build new result */
-    val64 = float64_val(estimate);
-    sbit = 0x8000000000000000ULL & val64;
-    exp = off - exp;
-    frac = extract64(val64, 0, 52);
-
-    if (exp == 0) {
-        frac = 1ULL << 51 | extract64(frac, 1, 51);
-    } else if (exp == -1) {
-        frac = 1ULL << 50 | extract64(frac, 2, 50);
-        exp = 0;
+    result_exp = exp_off - *exp;
+    result_frac = deposit64(0, 44, 8, estimate);
+    if (result_exp == 0) {
+        result_frac = deposit64(result_frac >> 1, 51, 1, 1);
+    } else if (result_exp == -1) {
+        result_frac = deposit64(result_frac >> 2, 50, 2, 1);
+        result_exp = 0;
     }
 
-    return make_float64(sbit | (exp << 52) | frac);
+    *exp = result_exp;
+
+    return result_frac;
 }
 
 static bool round_to_inf(float_status *fpst, bool sign_bit)
@@ -11615,18 +11610,63 @@ static bool round_to_inf(float_status *fpst, bool sign_bit)
     g_assert_not_reached();
 }
 
+float16 HELPER(recpe_f16)(float16 input, void *fpstp)
+{
+    float_status *fpst = fpstp;
+    float16 f16 = float16_squash_input_denormal(input, fpst);
+    uint32_t f16_val = float16_val(f16);
+    uint32_t f16_sign = float16_is_neg(f16);
+    int f16_exp = extract32(f16_val, 10, 5);
+    uint32_t f16_frac = extract32(f16_val, 0, 10);
+    uint64_t f64_frac;
+
+    if (float16_is_any_nan(f16)) {
+        float16 nan = f16;
+        if (float16_is_signaling_nan(f16, fpst)) {
+            float_raise(float_flag_invalid, fpst);
+            nan = float16_maybe_silence_nan(f16, fpst);
+        }
+        if (fpst->default_nan_mode) {
+            nan =  float16_default_nan(fpst);
+        }
+        return nan;
+    } else if (float16_is_infinity(f16)) {
+        return float16_set_sign(float16_zero, float16_is_neg(f16));
+    } else if (float16_is_zero(f16)) {
+        float_raise(float_flag_divbyzero, fpst);
+        return float16_set_sign(float16_infinity, float16_is_neg(f16));
+    } else if (float16_abs(f16) < (1 << 8)) {
+        /* Abs(value) < 2.0^-16 */
+        float_raise(float_flag_overflow | float_flag_inexact, fpst);
+        if (round_to_inf(fpst, f16_sign)) {
+            return float16_set_sign(float16_infinity, f16_sign);
+        } else {
+            return float16_set_sign(float16_maxnorm, f16_sign);
+        }
+    } else if (f16_exp >= 29 && fpst->flush_to_zero) {
+        float_raise(float_flag_underflow, fpst);
+        return float16_set_sign(float16_zero, float16_is_neg(f16));
+    }
+
+    f64_frac = call_recip_estimate(&f16_exp, 29,
+                                   ((uint64_t) f16_frac) << (52 - 10));
+
+    /* result = sign : result_exp<4:0> : fraction<51:42> */
+    f16_val = deposit32(0, 15, 1, f16_sign);
+    f16_val = deposit32(f16_val, 10, 5, f16_exp);
+    f16_val = deposit32(f16_val, 0, 10, extract64(f64_frac, 52 - 10, 10));
+    return make_float16(f16_val);
+}
+
 float32 HELPER(recpe_f32)(float32 input, void *fpstp)
 {
     float_status *fpst = fpstp;
     float32 f32 = float32_squash_input_denormal(input, fpst);
     uint32_t f32_val = float32_val(f32);
-    uint32_t f32_sbit = 0x80000000ULL & f32_val;
-    int32_t f32_exp = extract32(f32_val, 23, 8);
+    bool f32_sign = float32_is_neg(f32);
+    int f32_exp = extract32(f32_val, 23, 8);
     uint32_t f32_frac = extract32(f32_val, 0, 23);
-    float64 f64, r64;
-    uint64_t r64_val;
-    int64_t r64_exp;
-    uint64_t r64_frac;
+    uint64_t f64_frac;
 
     if (float32_is_any_nan(f32)) {
         float32 nan = f32;
@@ -11643,30 +11683,27 @@ float32 HELPER(recpe_f32)(float32 input, void *fpstp)
     } else if (float32_is_zero(f32)) {
         float_raise(float_flag_divbyzero, fpst);
         return float32_set_sign(float32_infinity, float32_is_neg(f32));
-    } else if ((f32_val & ~(1ULL << 31)) < (1ULL << 21)) {
+    } else if (float32_abs(f32) < (1ULL << 21)) {
         /* Abs(value) < 2.0^-128 */
         float_raise(float_flag_overflow | float_flag_inexact, fpst);
-        if (round_to_inf(fpst, f32_sbit)) {
-            return float32_set_sign(float32_infinity, float32_is_neg(f32));
+        if (round_to_inf(fpst, f32_sign)) {
+            return float32_set_sign(float32_infinity, f32_sign);
         } else {
-            return float32_set_sign(float32_maxnorm, float32_is_neg(f32));
+            return float32_set_sign(float32_maxnorm, f32_sign);
         }
     } else if (f32_exp >= 253 && fpst->flush_to_zero) {
         float_raise(float_flag_underflow, fpst);
         return float32_set_sign(float32_zero, float32_is_neg(f32));
     }
 
+    f64_frac = call_recip_estimate(&f32_exp, 253,
+                                   ((uint64_t) f32_frac) << (52 - 23));
 
-    f64 = make_float64(((int64_t)(f32_exp) << 52) | (int64_t)(f32_frac) << 29);
-    r64 = call_recip_estimate(f64, 253, fpst);
-    r64_val = float64_val(r64);
-    r64_exp = extract64(r64_val, 52, 11);
-    r64_frac = extract64(r64_val, 0, 52);
-
-    /* result = sign : result_exp<7:0> : fraction<51:29>; */
-    return make_float32(f32_sbit |
-                        (r64_exp & 0xff) << 23 |
-                        extract64(r64_frac, 29, 24));
+    /* result = sign : result_exp<7:0> : fraction<51:29> */
+    f32_val = deposit32(0, 31, 1, f32_sign);
+    f32_val = deposit32(f32_val, 23, 8, f32_exp);
+    f32_val = deposit32(f32_val, 0, 23, extract64(f64_frac, 52 - 23, 23));
+    return make_float32(f32_val);
 }
 
 float64 HELPER(recpe_f64)(float64 input, void *fpstp)
@@ -11674,12 +11711,9 @@ float64 HELPER(recpe_f64)(float64 input, void *fpstp)
     float_status *fpst = fpstp;
     float64 f64 = float64_squash_input_denormal(input, fpst);
     uint64_t f64_val = float64_val(f64);
-    uint64_t f64_sbit = 0x8000000000000000ULL & f64_val;
-    int64_t f64_exp = extract64(f64_val, 52, 11);
-    float64 r64;
-    uint64_t r64_val;
-    int64_t r64_exp;
-    uint64_t r64_frac;
+    bool f64_sign = float64_is_neg(f64);
+    int f64_exp = extract64(f64_val, 52, 11);
+    uint64_t f64_frac = extract64(f64_val, 0, 52);
 
     /* Deal with any special cases */
     if (float64_is_any_nan(f64)) {
@@ -11700,25 +11734,23 @@ float64 HELPER(recpe_f64)(float64 input, void *fpstp)
     } else if ((f64_val & ~(1ULL << 63)) < (1ULL << 50)) {
         /* Abs(value) < 2.0^-1024 */
         float_raise(float_flag_overflow | float_flag_inexact, fpst);
-        if (round_to_inf(fpst, f64_sbit)) {
-            return float64_set_sign(float64_infinity, float64_is_neg(f64));
+        if (round_to_inf(fpst, f64_sign)) {
+            return float64_set_sign(float64_infinity, f64_sign);
         } else {
-            return float64_set_sign(float64_maxnorm, float64_is_neg(f64));
+            return float64_set_sign(float64_maxnorm, f64_sign);
         }
     } else if (f64_exp >= 2045 && fpst->flush_to_zero) {
         float_raise(float_flag_underflow, fpst);
         return float64_set_sign(float64_zero, float64_is_neg(f64));
     }
 
-    r64 = call_recip_estimate(f64, 2045, fpst);
-    r64_val = float64_val(r64);
-    r64_exp = extract64(r64_val, 52, 11);
-    r64_frac = extract64(r64_val, 0, 52);
+    f64_frac = call_recip_estimate(&f64_exp, 2045, f64_frac);
 
-    /* result = sign : result_exp<10:0> : fraction<51:0> */
-    return make_float64(f64_sbit |
-                        ((r64_exp & 0x7ff) << 52) |
-                        r64_frac);
+    /* result = sign : result_exp<10:0> : fraction<51:0>; */
+    f64_val = deposit64(0, 63, 1, f64_sign);
+    f64_val = deposit64(f64_val, 52, 11, f64_exp);
+    f64_val = deposit64(f64_val, 0, 52, f64_frac);
+    return make_float64(f64_val);
 }
 
 /* The algorithm that must be used to calculate the estimate
@@ -11907,19 +11939,17 @@ float64 HELPER(rsqrte_f64)(float64 input, void *fpstp)
 
 uint32_t HELPER(recpe_u32)(uint32_t a, void *fpstp)
 {
-    float_status *s = fpstp;
-    float64 f64;
+    /* float_status *s = fpstp; */
+    int input, estimate;
 
     if ((a & 0x80000000) == 0) {
         return 0xffffffff;
     }
 
-    f64 = make_float64((0x3feULL << 52)
-                       | ((int64_t)(a & 0x7fffffff) << 21));
+    input = extract32(a, 23, 9);
+    estimate = recip_estimate(input);
 
-    f64 = recip_estimate(f64, s);
-
-    return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff);
+    return deposit32(0, (32 - 9), 9, estimate);
 }
 
 uint32_t HELPER(rsqrte_u32)(uint32_t a, void *fpstp)
-- 
2.16.2

[Qemu-devel] [PULL 31/42] arm/translate-a64: add FP16 FRECPE

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

Now we have added f16 during the re-factoring we can simply call the
helper.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-24-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/translate-a64.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 9f2c3682dc..50b4fa4ce4 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -11311,6 +11311,8 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
     case 0x6d: /* FCMLE (zero) */
         handle_2misc_fcmp_zero(s, fpop, is_scalar, 0, is_q, MO_16, rn, rd);
         return;
+    case 0x3d: /* FRECPE */
+        break;
     case 0x18: /* FRINTN */
         need_rmode = true;
         only_in_vector = true;
@@ -11431,6 +11433,9 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
         case 0x3b: /* FCVTZS */
             gen_helper_advsimd_f16tosinth(tcg_res, tcg_op, tcg_fpstatus);
             break;
+        case 0x3d: /* FRECPE */
+            gen_helper_recpe_f16(tcg_res, tcg_op, tcg_fpstatus);
+            break;
         case 0x5a: /* FCVTNU */
         case 0x5b: /* FCVTMU */
         case 0x5c: /* FCVTAU */
@@ -11466,6 +11471,9 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
             case 0x3b: /* FCVTZS */
                 gen_helper_advsimd_f16tosinth(tcg_res, tcg_op, tcg_fpstatus);
                 break;
+            case 0x3d: /* FRECPE */
+                gen_helper_recpe_f16(tcg_res, tcg_op, tcg_fpstatus);
+                break;
             case 0x5a: /* FCVTNU */
             case 0x5b: /* FCVTMU */
             case 0x5c: /* FCVTAU */
-- 
2.16.2

[Qemu-devel] [PULL 32/42] arm/translate-a64: add FP16 FRCPX to simd_two_reg_misc_fp16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

We go with the localised helper.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-25-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper-a64.h    |  1 +
 target/arm/helper-a64.c    | 29 +++++++++++++++++++++++++++++
 target/arm/translate-a64.c |  4 ++++
 3 files changed, 34 insertions(+)

diff --git a/target/arm/helper-a64.h b/target/arm/helper-a64.h
index 32931b17c6..339323fc3d 100644
--- a/target/arm/helper-a64.h
+++ b/target/arm/helper-a64.h
@@ -41,6 +41,7 @@ DEF_HELPER_FLAGS_1(neon_addlp_s16, TCG_CALL_NO_RWG_SE, i64, i64)
 DEF_HELPER_FLAGS_1(neon_addlp_u16, TCG_CALL_NO_RWG_SE, i64, i64)
 DEF_HELPER_FLAGS_2(frecpx_f64, TCG_CALL_NO_RWG, f64, f64, ptr)
 DEF_HELPER_FLAGS_2(frecpx_f32, TCG_CALL_NO_RWG, f32, f32, ptr)
+DEF_HELPER_FLAGS_2(frecpx_f16, TCG_CALL_NO_RWG, f16, f16, ptr)
 DEF_HELPER_FLAGS_2(fcvtx_f64_to_f32, TCG_CALL_NO_RWG, f32, f64, env)
 DEF_HELPER_FLAGS_3(crc32_64, TCG_CALL_NO_RWG_SE, i64, i64, i64, i32)
 DEF_HELPER_FLAGS_3(crc32c_64, TCG_CALL_NO_RWG_SE, i64, i64, i64, i32)
diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
index 722fff2349..92a0d55a9c 100644
--- a/target/arm/helper-a64.c
+++ b/target/arm/helper-a64.c
@@ -356,6 +356,35 @@ uint64_t HELPER(neon_addlp_u16)(uint64_t a)
 }
 
 /* Floating-point reciprocal exponent - see FPRecpX in ARM ARM */
+float16 HELPER(frecpx_f16)(float16 a, void *fpstp)
+{
+    float_status *fpst = fpstp;
+    uint16_t val16, sbit;
+    int16_t exp;
+
+    if (float16_is_any_nan(a)) {
+        float16 nan = a;
+        if (float16_is_signaling_nan(a, fpst)) {
+            float_raise(float_flag_invalid, fpst);
+            nan = float16_maybe_silence_nan(a, fpst);
+        }
+        if (fpst->default_nan_mode) {
+            nan = float16_default_nan(fpst);
+        }
+        return nan;
+    }
+
+    val16 = float16_val(a);
+    sbit = 0x8000 & val16;
+    exp = extract32(val16, 10, 5);
+
+    if (exp == 0) {
+        return make_float16(deposit32(sbit, 10, 5, 0x1e));
+    } else {
+        return make_float16(deposit32(sbit, 10, 5, ~exp));
+    }
+}
+
 float32 HELPER(frecpx_f32)(float32 a, void *fpstp)
 {
     float_status *fpst = fpstp;
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 50b4fa4ce4..715dc4333d 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -11312,6 +11312,7 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
         handle_2misc_fcmp_zero(s, fpop, is_scalar, 0, is_q, MO_16, rn, rd);
         return;
     case 0x3d: /* FRECPE */
+    case 0x3f: /* FRECPX */
         break;
     case 0x18: /* FRINTN */
         need_rmode = true;
@@ -11436,6 +11437,9 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
         case 0x3d: /* FRECPE */
             gen_helper_recpe_f16(tcg_res, tcg_op, tcg_fpstatus);
             break;
+        case 0x3f: /* FRECPX */
+            gen_helper_frecpx_f16(tcg_res, tcg_op, tcg_fpstatus);
+            break;
         case 0x5a: /* FCVTNU */
         case 0x5b: /* FCVTMU */
         case 0x5c: /* FCVTAU */
-- 
2.16.2

[Qemu-devel] [PULL 33/42] arm/translate-a64: add FP16 FSQRT to simd_two_reg_misc_fp16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-26-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper-a64.h    |  1 +
 target/arm/helper-a64.c    | 13 +++++++++++++
 target/arm/translate-a64.c |  5 +++++
 3 files changed, 19 insertions(+)

diff --git a/target/arm/helper-a64.h b/target/arm/helper-a64.h
index 339323fc3d..ef4ddfe9d8 100644
--- a/target/arm/helper-a64.h
+++ b/target/arm/helper-a64.h
@@ -80,3 +80,4 @@ DEF_HELPER_2(advsimd_rinth_exact, f16, f16, ptr)
 DEF_HELPER_2(advsimd_rinth, f16, f16, ptr)
 DEF_HELPER_2(advsimd_f16tosinth, i32, f16, ptr)
 DEF_HELPER_2(advsimd_f16touinth, i32, f16, ptr)
+DEF_HELPER_2(sqrt_f16, f16, f16, ptr)
diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
index 92a0d55a9c..afb25ad20c 100644
--- a/target/arm/helper-a64.c
+++ b/target/arm/helper-a64.c
@@ -828,3 +828,16 @@ uint32_t HELPER(advsimd_f16touinth)(float16 a, void *fpstp)
     }
     return float16_to_uint16(a, fpst);
 }
+
+/*
+ * Square Root and Reciprocal square root
+ */
+
+float16 HELPER(sqrt_f16)(float16 a, void *fpstp)
+{
+    float_status *s = fpstp;
+
+    return float16_sqrt(a, s);
+}
+
+
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 715dc4333d..1096ff48ac 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -11388,6 +11388,8 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
     case 0x6f: /* FNEG */
         need_fpst = false;
         break;
+    case 0x7f: /* FSQRT (vector) */
+        break;
     default:
         fprintf(stderr, "%s: insn %#04x fpop %#2x\n", __func__, insn, fpop);
         g_assert_not_reached();
@@ -11502,6 +11504,9 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
             case 0x6f: /* FNEG */
                 tcg_gen_xori_i32(tcg_res, tcg_op, 0x8000);
                 break;
+            case 0x7f: /* FSQRT */
+                gen_helper_sqrt_f16(tcg_res, tcg_op, tcg_fpstatus);
+                break;
             default:
                 g_assert_not_reached();
             }
-- 
2.16.2

[Qemu-devel] [PULL 34/42] arm/helper.c: re-factor rsqrte and add rsqrte_f16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

Much like recpe the ARM ARM has simplified the pseudo code for the
calculation which is done on a fixed point 9 bit integer maths. So
while adding f16 we can also clean this up to be a little less heavy
on the floating point and just return the fractional part and leave
the calle's to do the final packing of the result.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-27-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper.h |   1 +
 target/arm/helper.c | 221 ++++++++++++++++++++++++----------------------------
 2 files changed, 104 insertions(+), 118 deletions(-)

diff --git a/target/arm/helper.h b/target/arm/helper.h
index 81d7baed6d..6dd8504ec3 100644
--- a/target/arm/helper.h
+++ b/target/arm/helper.h
@@ -195,6 +195,7 @@ DEF_HELPER_3(rsqrts_f32, f32, f32, f32, env)
 DEF_HELPER_FLAGS_2(recpe_f16, TCG_CALL_NO_RWG, f16, f16, ptr)
 DEF_HELPER_FLAGS_2(recpe_f32, TCG_CALL_NO_RWG, f32, f32, ptr)
 DEF_HELPER_FLAGS_2(recpe_f64, TCG_CALL_NO_RWG, f64, f64, ptr)
+DEF_HELPER_FLAGS_2(rsqrte_f16, TCG_CALL_NO_RWG, f16, f16, ptr)
 DEF_HELPER_FLAGS_2(rsqrte_f32, TCG_CALL_NO_RWG, f32, f32, ptr)
 DEF_HELPER_FLAGS_2(rsqrte_f64, TCG_CALL_NO_RWG, f64, f64, ptr)
 DEF_HELPER_2(recpe_u32, i32, i32, ptr)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index e2d0ff0b4c..c82f63d440 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -11756,56 +11756,97 @@ float64 HELPER(recpe_f64)(float64 input, void *fpstp)
 /* The algorithm that must be used to calculate the estimate
  * is specified by the ARM ARM.
  */
-static float64 recip_sqrt_estimate(float64 a, float_status *real_fp_status)
+
+static int do_recip_sqrt_estimate(int a)
 {
-    /* These calculations mustn't set any fp exception flags,
-     * so we use a local copy of the fp_status.
-     */
-    float_status dummy_status = *real_fp_status;
-    float_status *s = &dummy_status;
-    float64 q;
-    int64_t q_int;
+    int b, estimate;
 
-    if (float64_lt(a, float64_half, s)) {
-        /* range 0.25 <= a < 0.5 */
-
-        /* a in units of 1/512 rounded down */
-        /* q0 = (int)(a * 512.0);  */
-        q = float64_mul(float64_512, a, s);
-        q_int = float64_to_int64_round_to_zero(q, s);
-
-        /* reciprocal root r */
-        /* r = 1.0 / sqrt(((double)q0 + 0.5) / 512.0);  */
-        q = int64_to_float64(q_int, s);
-        q = float64_add(q, float64_half, s);
-        q = float64_div(q, float64_512, s);
-        q = float64_sqrt(q, s);
-        q = float64_div(float64_one, q, s);
+    assert(128 <= a && a < 512);
+    if (a < 256) {
+        a = a * 2 + 1;
     } else {
-        /* range 0.5 <= a < 1.0 */
-
-        /* a in units of 1/256 rounded down */
-        /* q1 = (int)(a * 256.0); */
-        q = float64_mul(float64_256, a, s);
-        int64_t q_int = float64_to_int64_round_to_zero(q, s);
-
-        /* reciprocal root r */
-        /* r = 1.0 /sqrt(((double)q1 + 0.5) / 256); */
-        q = int64_to_float64(q_int, s);
-        q = float64_add(q, float64_half, s);
-        q = float64_div(q, float64_256, s);
-        q = float64_sqrt(q, s);
-        q = float64_div(float64_one, q, s);
+        a = (a >> 1) << 1;
+        a = (a + 1) * 2;
     }
-    /* r in units of 1/256 rounded to nearest */
-    /* s = (int)(256.0 * r + 0.5); */
+    b = 512;
+    while (a * (b + 1) * (b + 1) < (1 << 28)) {
+        b += 1;
+    }
+    estimate = (b + 1) / 2;
+    assert(256 <= estimate && estimate < 512);
 
-    q = float64_mul(q, float64_256,s );
-    q = float64_add(q, float64_half, s);
-    q_int = float64_to_int64_round_to_zero(q, s);
+    return estimate;
+}
 
-    /* return (double)s / 256.0;*/
-    return float64_div(int64_to_float64(q_int, s), float64_256, s);
+
+static uint64_t recip_sqrt_estimate(int *exp , int exp_off, uint64_t frac)
+{
+    int estimate;
+    uint32_t scaled;
+
+    if (*exp == 0) {
+        while (extract64(frac, 51, 1) == 0) {
+            frac = frac << 1;
+            *exp -= 1;
+        }
+        frac = extract64(frac, 0, 51) << 1;
+    }
+
+    if (*exp & 1) {
+        /* scaled = UInt('01':fraction<51:45>) */
+        scaled = deposit32(1 << 7, 0, 7, extract64(frac, 45, 7));
+    } else {
+        /* scaled = UInt('1':fraction<51:44>) */
+        scaled = deposit32(1 << 8, 0, 8, extract64(frac, 44, 8));
+    }
+    estimate = do_recip_sqrt_estimate(scaled);
+
+    *exp = (exp_off - *exp) / 2;
+    return extract64(estimate, 0, 8) << 44;
+}
+
+float16 HELPER(rsqrte_f16)(float16 input, void *fpstp)
+{
+    float_status *s = fpstp;
+    float16 f16 = float16_squash_input_denormal(input, s);
+    uint16_t val = float16_val(f16);
+    bool f16_sign = float16_is_neg(f16);
+    int f16_exp = extract32(val, 10, 5);
+    uint16_t f16_frac = extract32(val, 0, 10);
+    uint64_t f64_frac;
+
+    if (float16_is_any_nan(f16)) {
+        float16 nan = f16;
+        if (float16_is_signaling_nan(f16, s)) {
+            float_raise(float_flag_invalid, s);
+            nan = float16_maybe_silence_nan(f16, s);
+        }
+        if (s->default_nan_mode) {
+            nan =  float16_default_nan(s);
+        }
+        return nan;
+    } else if (float16_is_zero(f16)) {
+        float_raise(float_flag_divbyzero, s);
+        return float16_set_sign(float16_infinity, f16_sign);
+    } else if (f16_sign) {
+        float_raise(float_flag_invalid, s);
+        return float16_default_nan(s);
+    } else if (float16_is_infinity(f16)) {
+        return float16_zero;
+    }
+
+    /* Scale and normalize to a double-precision value between 0.25 and 1.0,
+     * preserving the parity of the exponent.  */
+
+    f64_frac = ((uint64_t) f16_frac) << (52 - 10);
+
+    f64_frac = recip_sqrt_estimate(&f16_exp, 44, f64_frac);
+
+    /* result = sign : result_exp<4:0> : estimate<7:0> : Zeros(2) */
+    val = deposit32(0, 15, 1, f16_sign);
+    val = deposit32(val, 10, 5, f16_exp);
+    val = deposit32(val, 2, 8, extract64(f64_frac, 52 - 8, 8));
+    return make_float16(val);
 }
 
 float32 HELPER(rsqrte_f32)(float32 input, void *fpstp)
@@ -11813,13 +11854,10 @@ float32 HELPER(rsqrte_f32)(float32 input, void *fpstp)
     float_status *s = fpstp;
     float32 f32 = float32_squash_input_denormal(input, s);
     uint32_t val = float32_val(f32);
-    uint32_t f32_sbit = 0x80000000 & val;
-    int32_t f32_exp = extract32(val, 23, 8);
+    uint32_t f32_sign = float32_is_neg(f32);
+    int f32_exp = extract32(val, 23, 8);
     uint32_t f32_frac = extract32(val, 0, 23);
     uint64_t f64_frac;
-    uint64_t val64;
-    int result_exp;
-    float64 f64;
 
     if (float32_is_any_nan(f32)) {
         float32 nan = f32;
@@ -11845,32 +11883,13 @@ float32 HELPER(rsqrte_f32)(float32 input, void *fpstp)
      * preserving the parity of the exponent.  */
 
     f64_frac = ((uint64_t) f32_frac) << 29;
-    if (f32_exp == 0) {
-        while (extract64(f64_frac, 51, 1) == 0) {
-            f64_frac = f64_frac << 1;
-            f32_exp = f32_exp-1;
-        }
-        f64_frac = extract64(f64_frac, 0, 51) << 1;
-    }
 
-    if (extract64(f32_exp, 0, 1) == 0) {
-        f64 = make_float64(((uint64_t) f32_sbit) << 32
-                           | (0x3feULL << 52)
-                           | f64_frac);
-    } else {
-        f64 = make_float64(((uint64_t) f32_sbit) << 32
-                           | (0x3fdULL << 52)
-                           | f64_frac);
-    }
+    f64_frac = recip_sqrt_estimate(&f32_exp, 380, f64_frac);
 
-    result_exp = (380 - f32_exp) / 2;
-
-    f64 = recip_sqrt_estimate(f64, s);
-
-    val64 = float64_val(f64);
-
-    val = ((result_exp & 0xff) << 23)
-        | ((val64 >> 29)  & 0x7fffff);
+    /* result = sign : result_exp<4:0> : estimate<7:0> : Zeros(15) */
+    val = deposit32(0, 31, 1, f32_sign);
+    val = deposit32(val, 23, 8, f32_exp);
+    val = deposit32(val, 15, 8, extract64(f64_frac, 52 - 8, 8));
     return make_float32(val);
 }
 
@@ -11879,11 +11898,9 @@ float64 HELPER(rsqrte_f64)(float64 input, void *fpstp)
     float_status *s = fpstp;
     float64 f64 = float64_squash_input_denormal(input, s);
     uint64_t val = float64_val(f64);
-    uint64_t f64_sbit = 0x8000000000000000ULL & val;
-    int64_t f64_exp = extract64(val, 52, 11);
+    bool f64_sign = float64_is_neg(f64);
+    int f64_exp = extract64(val, 52, 11);
     uint64_t f64_frac = extract64(val, 0, 52);
-    int64_t result_exp;
-    uint64_t result_frac;
 
     if (float64_is_any_nan(f64)) {
         float64 nan = f64;
@@ -11905,36 +11922,13 @@ float64 HELPER(rsqrte_f64)(float64 input, void *fpstp)
         return float64_zero;
     }
 
-    /* Scale and normalize to a double-precision value between 0.25 and 1.0,
-     * preserving the parity of the exponent.  */
+    f64_frac = recip_sqrt_estimate(&f64_exp, 3068, f64_frac);
 
-    if (f64_exp == 0) {
-        while (extract64(f64_frac, 51, 1) == 0) {
-            f64_frac = f64_frac << 1;
-            f64_exp = f64_exp - 1;
-        }
-        f64_frac = extract64(f64_frac, 0, 51) << 1;
-    }
-
-    if (extract64(f64_exp, 0, 1) == 0) {
-        f64 = make_float64(f64_sbit
-                           | (0x3feULL << 52)
-                           | f64_frac);
-    } else {
-        f64 = make_float64(f64_sbit
-                           | (0x3fdULL << 52)
-                           | f64_frac);
-    }
-
-    result_exp = (3068 - f64_exp) / 2;
-
-    f64 = recip_sqrt_estimate(f64, s);
-
-    result_frac = extract64(float64_val(f64), 0, 52);
-
-    return make_float64(f64_sbit |
-                        ((result_exp & 0x7ff) << 52) |
-                        result_frac);
+    /* result = sign : result_exp<4:0> : estimate<7:0> : Zeros(44) */
+    val = deposit64(0, 61, 1, f64_sign);
+    val = deposit64(val, 52, 11, f64_exp);
+    val = deposit64(val, 44, 8, extract64(f64_frac, 52 - 8, 8));
+    return make_float64(val);
 }
 
 uint32_t HELPER(recpe_u32)(uint32_t a, void *fpstp)
@@ -11954,24 +11948,15 @@ uint32_t HELPER(recpe_u32)(uint32_t a, void *fpstp)
 
 uint32_t HELPER(rsqrte_u32)(uint32_t a, void *fpstp)
 {
-    float_status *fpst = fpstp;
-    float64 f64;
+    int estimate;
 
     if ((a & 0xc0000000) == 0) {
         return 0xffffffff;
     }
 
-    if (a & 0x80000000) {
-        f64 = make_float64((0x3feULL << 52)
-                           | ((uint64_t)(a & 0x7fffffff) << 21));
-    } else { /* bits 31-30 == '01' */
-        f64 = make_float64((0x3fdULL << 52)
-                           | ((uint64_t)(a & 0x3fffffff) << 22));
-    }
+    estimate = do_recip_sqrt_estimate(extract32(a, 23, 9));
 
-    f64 = recip_sqrt_estimate(f64, fpst);
-
-    return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff);
+    return deposit32(0, 23, 9, estimate);
 }
 
 /* VFPv4 fused multiply-accumulate */
-- 
2.16.2

[Qemu-devel] [PULL 35/42] arm/translate-a64: add FP16 FRSQRTE to simd_two_reg_misc_fp16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-28-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/translate-a64.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 1096ff48ac..86231b33bb 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -11388,6 +11388,7 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
     case 0x6f: /* FNEG */
         need_fpst = false;
         break;
+    case 0x7d: /* FRSQRTE */
     case 0x7f: /* FSQRT (vector) */
         break;
     default:
@@ -11452,6 +11453,9 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
         case 0x6f: /* FNEG */
             tcg_gen_xori_i32(tcg_res, tcg_op, 0x8000);
             break;
+        case 0x7d: /* FRSQRTE */
+            gen_helper_rsqrte_f16(tcg_res, tcg_op, tcg_fpstatus);
+            break;
         default:
             g_assert_not_reached();
         }
@@ -11504,6 +11508,9 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
             case 0x6f: /* FNEG */
                 tcg_gen_xori_i32(tcg_res, tcg_op, 0x8000);
                 break;
+            case 0x7d: /* FRSQRTE */
+                gen_helper_rsqrte_f16(tcg_res, tcg_op, tcg_fpstatus);
+                break;
             case 0x7f: /* FSQRT */
                 gen_helper_sqrt_f16(tcg_res, tcg_op, tcg_fpstatus);
                 break;
-- 
2.16.2

[Qemu-devel] [PULL 36/42] arm/translate-a64: add FP16 FMOV to simd_mod_imm

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

Only one half-precision instruction has been added to this group.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-29-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/translate-a64.c | 35 +++++++++++++++++++++++++----------
 1 file changed, 25 insertions(+), 10 deletions(-)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 86231b33bb..7c2bc05b92 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -6234,6 +6234,8 @@ static void disas_simd_copy(DisasContext *s, uint32_t insn)
  *   MVNI - move inverted (shifted) imm into register
  *   ORR  - bitwise OR of (shifted) imm with register
  *   BIC  - bitwise clear of (shifted) imm with register
+ * With ARMv8.2 we also have:
+ *   FMOV half-precision
  */
 static void disas_simd_mod_imm(DisasContext *s, uint32_t insn)
 {
@@ -6248,8 +6250,11 @@ static void disas_simd_mod_imm(DisasContext *s, uint32_t insn)
     uint64_t imm = 0;
 
     if (o2 != 0 || ((cmode == 0xf) && is_neg && !is_q)) {
-        unallocated_encoding(s);
-        return;
+        /* Check for FMOV (vector, immediate) - half-precision */
+        if (!(arm_dc_feature(s, ARM_FEATURE_V8_FP16) && o2 && cmode == 0xf)) {
+            unallocated_encoding(s);
+            return;
+        }
     }
 
     if (!fp_access_check(s)) {
@@ -6307,19 +6312,29 @@ static void disas_simd_mod_imm(DisasContext *s, uint32_t insn)
                     imm |= 0x4000000000000000ULL;
                 }
             } else {
-                imm = (abcdefgh & 0x3f) << 19;
-                if (abcdefgh & 0x80) {
-                    imm |= 0x80000000;
-                }
-                if (abcdefgh & 0x40) {
-                    imm |= 0x3e000000;
+                if (o2) {
+                    /* FMOV (vector, immediate) - half-precision */
+                    imm = vfp_expand_imm(MO_16, abcdefgh);
+                    /* now duplicate across the lanes */
+                    imm = bitfield_replicate(imm, 16);
                 } else {
-                    imm |= 0x40000000;
+                    imm = (abcdefgh & 0x3f) << 19;
+                    if (abcdefgh & 0x80) {
+                        imm |= 0x80000000;
+                    }
+                    if (abcdefgh & 0x40) {
+                        imm |= 0x3e000000;
+                    } else {
+                        imm |= 0x40000000;
+                    }
+                    imm |= (imm << 32);
                 }
-                imm |= (imm << 32);
             }
         }
         break;
+    default:
+        fprintf(stderr, "%s: cmode_3_1: %x\n", __func__, cmode_3_1);
+        g_assert_not_reached();
     }
 
     if (cmode_3_1 != 7 && is_neg) {
-- 
2.16.2

[Qemu-devel] [PULL 37/42] arm/translate-a64: add all FP16 ops in simd_scalar_pairwise

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

I only needed to do a little light re-factoring to support the
half-precision helpers.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-30-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/translate-a64.c | 80 +++++++++++++++++++++++++++++++---------------
 1 file changed, 54 insertions(+), 26 deletions(-)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 7c2bc05b92..9d3a6ac49f 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -6416,24 +6416,30 @@ static void disas_simd_scalar_pairwise(DisasContext *s, uint32_t insn)
     case 0xf: /* FMAXP */
     case 0x2c: /* FMINNMP */
     case 0x2f: /* FMINP */
-        /* FP op, size[0] is 32 or 64 bit */
+        /* FP op, size[0] is 32 or 64 bit*/
         if (!u) {
-            unallocated_encoding(s);
-            return;
+            if (!arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {
+                unallocated_encoding(s);
+                return;
+            } else {
+                size = MO_16;
+            }
+        } else {
+            size = extract32(size, 0, 1) ? MO_64 : MO_32;
         }
+
         if (!fp_access_check(s)) {
             return;
         }
 
-        size = extract32(size, 0, 1) ? 3 : 2;
-        fpst = get_fpstatus_ptr(false);
+        fpst = get_fpstatus_ptr(size == MO_16);
         break;
     default:
         unallocated_encoding(s);
         return;
     }
 
-    if (size == 3) {
+    if (size == MO_64) {
         TCGv_i64 tcg_op1 = tcg_temp_new_i64();
         TCGv_i64 tcg_op2 = tcg_temp_new_i64();
         TCGv_i64 tcg_res = tcg_temp_new_i64();
@@ -6474,27 +6480,49 @@ static void disas_simd_scalar_pairwise(DisasContext *s, uint32_t insn)
         TCGv_i32 tcg_op2 = tcg_temp_new_i32();
         TCGv_i32 tcg_res = tcg_temp_new_i32();
 
-        read_vec_element_i32(s, tcg_op1, rn, 0, MO_32);
-        read_vec_element_i32(s, tcg_op2, rn, 1, MO_32);
+        read_vec_element_i32(s, tcg_op1, rn, 0, size);
+        read_vec_element_i32(s, tcg_op2, rn, 1, size);
 
-        switch (opcode) {
-        case 0xc: /* FMAXNMP */
-            gen_helper_vfp_maxnums(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0xd: /* FADDP */
-            gen_helper_vfp_adds(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0xf: /* FMAXP */
-            gen_helper_vfp_maxs(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0x2c: /* FMINNMP */
-            gen_helper_vfp_minnums(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        case 0x2f: /* FMINP */
-            gen_helper_vfp_mins(tcg_res, tcg_op1, tcg_op2, fpst);
-            break;
-        default:
-            g_assert_not_reached();
+        if (size == MO_16) {
+            switch (opcode) {
+            case 0xc: /* FMAXNMP */
+                gen_helper_advsimd_maxnumh(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0xd: /* FADDP */
+                gen_helper_advsimd_addh(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0xf: /* FMAXP */
+                gen_helper_advsimd_maxh(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x2c: /* FMINNMP */
+                gen_helper_advsimd_minnumh(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x2f: /* FMINP */
+                gen_helper_advsimd_minh(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            default:
+                g_assert_not_reached();
+            }
+        } else {
+            switch (opcode) {
+            case 0xc: /* FMAXNMP */
+                gen_helper_vfp_maxnums(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0xd: /* FADDP */
+                gen_helper_vfp_adds(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0xf: /* FMAXP */
+                gen_helper_vfp_maxs(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x2c: /* FMINNMP */
+                gen_helper_vfp_minnums(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            case 0x2f: /* FMINP */
+                gen_helper_vfp_mins(tcg_res, tcg_op1, tcg_op2, fpst);
+                break;
+            default:
+                g_assert_not_reached();
+            }
         }
 
         write_fp_sreg(s, rd, tcg_res);
-- 
2.16.2

[Qemu-devel] [PULL 38/42] arm/translate-a64: implement simd_scalar_three_reg_same_fp16

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

This covers the encoding group:

  Advanced SIMD scalar three same FP16

As all the helpers are already there it is simply a case of calling the
existing helpers in the scalar context.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-31-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/translate-a64.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 9d3a6ac49f..52cecae047 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -7802,6 +7802,104 @@ static void disas_simd_scalar_three_reg_same(DisasContext *s, uint32_t insn)
     tcg_temp_free_i64(tcg_rd);
 }
 
+/* AdvSIMD scalar three same FP16
+ *  31 30  29 28       24 23  22 21 20  16 15 14 13    11 10  9  5 4  0
+ * +-----+---+-----------+---+-----+------+-----+--------+---+----+----+
+ * | 0 1 | U | 1 1 1 1 0 | a | 1 0 |  Rm  | 0 0 | opcode | 1 | Rn | Rd |
+ * +-----+---+-----------+---+-----+------+-----+--------+---+----+----+
+ * v: 0101 1110 0100 0000 0000 0100 0000 0000 => 5e400400
+ * m: 1101 1111 0110 0000 1100 0100 0000 0000 => df60c400
+ */
+static void disas_simd_scalar_three_reg_same_fp16(DisasContext *s,
+                                                  uint32_t insn)
+{
+    int rd = extract32(insn, 0, 5);
+    int rn = extract32(insn, 5, 5);
+    int opcode = extract32(insn, 11, 3);
+    int rm = extract32(insn, 16, 5);
+    bool u = extract32(insn, 29, 1);
+    bool a = extract32(insn, 23, 1);
+    int fpopcode = opcode | (a << 3) |  (u << 4);
+    TCGv_ptr fpst;
+    TCGv_i32 tcg_op1;
+    TCGv_i32 tcg_op2;
+    TCGv_i32 tcg_res;
+
+    switch (fpopcode) {
+    case 0x03: /* FMULX */
+    case 0x04: /* FCMEQ (reg) */
+    case 0x07: /* FRECPS */
+    case 0x0f: /* FRSQRTS */
+    case 0x14: /* FCMGE (reg) */
+    case 0x15: /* FACGE */
+    case 0x1a: /* FABD */
+    case 0x1c: /* FCMGT (reg) */
+    case 0x1d: /* FACGT */
+        break;
+    default:
+        unallocated_encoding(s);
+        return;
+    }
+
+    if (!arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {
+        unallocated_encoding(s);
+    }
+
+    if (!fp_access_check(s)) {
+        return;
+    }
+
+    fpst = get_fpstatus_ptr(true);
+
+    tcg_op1 = tcg_temp_new_i32();
+    tcg_op2 = tcg_temp_new_i32();
+    tcg_res = tcg_temp_new_i32();
+
+    read_vec_element_i32(s, tcg_op1, rn, 0, MO_16);
+    read_vec_element_i32(s, tcg_op2, rm, 0, MO_16);
+
+    switch (fpopcode) {
+    case 0x03: /* FMULX */
+        gen_helper_advsimd_mulxh(tcg_res, tcg_op1, tcg_op2, fpst);
+        break;
+    case 0x04: /* FCMEQ (reg) */
+        gen_helper_advsimd_ceq_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+        break;
+    case 0x07: /* FRECPS */
+        gen_helper_recpsf_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+        break;
+    case 0x0f: /* FRSQRTS */
+        gen_helper_rsqrtsf_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+        break;
+    case 0x14: /* FCMGE (reg) */
+        gen_helper_advsimd_cge_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+        break;
+    case 0x15: /* FACGE */
+        gen_helper_advsimd_acge_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+        break;
+    case 0x1a: /* FABD */
+        gen_helper_advsimd_subh(tcg_res, tcg_op1, tcg_op2, fpst);
+        tcg_gen_andi_i32(tcg_res, tcg_res, 0x7fff);
+        break;
+    case 0x1c: /* FCMGT (reg) */
+        gen_helper_advsimd_cgt_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+        break;
+    case 0x1d: /* FACGT */
+        gen_helper_advsimd_acgt_f16(tcg_res, tcg_op1, tcg_op2, fpst);
+        break;
+    default:
+        g_assert_not_reached();
+    }
+
+    write_fp_sreg(s, rd, tcg_res);
+
+
+    tcg_temp_free_i32(tcg_res);
+    tcg_temp_free_i32(tcg_op1);
+    tcg_temp_free_i32(tcg_op2);
+    tcg_temp_free_ptr(fpst);
+}
+
 static void handle_2misc_64(DisasContext *s, int opcode, bool u,
                             TCGv_i64 tcg_rd, TCGv_i64 tcg_rn,
                             TCGv_i32 tcg_rmode, TCGv_ptr tcg_fpstatus)
@@ -12653,6 +12751,7 @@ static const AArch64DecodeTable data_proc_simd[] = {
     { 0xce408000, 0xffe0c000, disas_crypto_three_reg_imm2 },
     { 0x0e400400, 0x9f60c400, disas_simd_three_reg_same_fp16 },
     { 0x0e780800, 0x8f7e0c00, disas_simd_two_reg_misc_fp16 },
+    { 0x5e400400, 0xdf60c400, disas_simd_scalar_three_reg_same_fp16 },
     { 0x00000000, 0x00000000, NULL }
 };
 
-- 
2.16.2

[Qemu-devel] [PULL 39/42] arm/translate-a64: add all single op FP16 to handle_fp_1src_half

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

This includes FMOV, FABS, FNEG, FSQRT and  FRINT[NPMZAXI]. We re-use
existing helpers to achieve this.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-32-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/translate-a64.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 52cecae047..32811dc8b0 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -4596,6 +4596,65 @@ static void disas_fp_csel(DisasContext *s, uint32_t insn)
     tcg_temp_free_i64(t_true);
 }
 
+/* Floating-point data-processing (1 source) - half precision */
+static void handle_fp_1src_half(DisasContext *s, int opcode, int rd, int rn)
+{
+    TCGv_ptr fpst = NULL;
+    TCGv_i32 tcg_op = tcg_temp_new_i32();
+    TCGv_i32 tcg_res = tcg_temp_new_i32();
+
+    read_vec_element_i32(s, tcg_op, rn, 0, MO_16);
+
+    switch (opcode) {
+    case 0x0: /* FMOV */
+        tcg_gen_mov_i32(tcg_res, tcg_op);
+        break;
+    case 0x1: /* FABS */
+        tcg_gen_andi_i32(tcg_res, tcg_op, 0x7fff);
+        break;
+    case 0x2: /* FNEG */
+        tcg_gen_xori_i32(tcg_res, tcg_op, 0x8000);
+        break;
+    case 0x3: /* FSQRT */
+        gen_helper_sqrt_f16(tcg_res, tcg_op, cpu_env);
+        break;
+    case 0x8: /* FRINTN */
+    case 0x9: /* FRINTP */
+    case 0xa: /* FRINTM */
+    case 0xb: /* FRINTZ */
+    case 0xc: /* FRINTA */
+    {
+        TCGv_i32 tcg_rmode = tcg_const_i32(arm_rmode_to_sf(opcode & 7));
+        fpst = get_fpstatus_ptr(true);
+
+        gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst);
+        gen_helper_advsimd_rinth(tcg_res, tcg_op, fpst);
+
+        gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst);
+        tcg_temp_free_i32(tcg_rmode);
+        break;
+    }
+    case 0xe: /* FRINTX */
+        fpst = get_fpstatus_ptr(true);
+        gen_helper_advsimd_rinth_exact(tcg_res, tcg_op, fpst);
+        break;
+    case 0xf: /* FRINTI */
+        fpst = get_fpstatus_ptr(true);
+        gen_helper_advsimd_rinth(tcg_res, tcg_op, fpst);
+        break;
+    default:
+        abort();
+    }
+
+    write_fp_sreg(s, rd, tcg_res);
+
+    if (fpst) {
+        tcg_temp_free_ptr(fpst);
+    }
+    tcg_temp_free_i32(tcg_op);
+    tcg_temp_free_i32(tcg_res);
+}
+
 /* Floating-point data-processing (1 source) - single precision */
 static void handle_fp_1src_single(DisasContext *s, int opcode, int rd, int rn)
 {
@@ -4825,6 +4884,18 @@ static void disas_fp_1src(DisasContext *s, uint32_t insn)
 
             handle_fp_1src_double(s, opcode, rd, rn);
             break;
+        case 3:
+            if (!arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {
+                unallocated_encoding(s);
+                return;
+            }
+
+            if (!fp_access_check(s)) {
+                return;
+            }
+
+            handle_fp_1src_half(s, opcode, rd, rn);
+            break;
         default:
             unallocated_encoding(s);
         }
-- 
2.16.2

[Qemu-devel] [PULL 40/42] target/arm: Enable ARM_V8_FP16 feature bit for the AArch64 "any" CPU

[Peter Maydell]

Now we have implemented FP16 we can enable it for the "any" CPU.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
[PMM: split out from an earlier patch in the series]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/cpu64.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 1c330adc28..9743bdc8c3 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -230,6 +230,7 @@ static void aarch64_any_initfn(Object *obj)
     set_feature(&cpu->env, ARM_FEATURE_V8_SM4);
     set_feature(&cpu->env, ARM_FEATURE_V8_PMULL);
     set_feature(&cpu->env, ARM_FEATURE_CRC);
+    set_feature(&cpu->env, ARM_FEATURE_V8_FP16);
     cpu->ctr = 0x80038003; /* 32 byte I and D cacheline size, VIPT icache */
     cpu->dcz_blocksize = 7; /*  512 bytes */
 }
-- 
2.16.2

[Qemu-devel] [PULL 41/42] linux-user: Report AArch64 FP16 support via hwcap bits

[Peter Maydell]

Set the appropriate Linux hwcap bits to tell the guest binary if we
have implemented half-precision floating point support.

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

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 0208022445..6689089cd2 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -551,6 +551,8 @@ static uint32_t get_elf_hwcap(void)
     GET_FEATURE(ARM_FEATURE_V8_SM3, ARM_HWCAP_A64_SM3);
     GET_FEATURE(ARM_FEATURE_V8_SM4, ARM_HWCAP_A64_SM4);
     GET_FEATURE(ARM_FEATURE_V8_SHA512, ARM_HWCAP_A64_SHA512);
+    GET_FEATURE(ARM_FEATURE_V8_FP16,
+                ARM_HWCAP_A64_FPHP | ARM_HWCAP_A64_ASIMDHP);
 #undef GET_FEATURE
 
     return hwcaps;
-- 
2.16.2

[Qemu-devel] [PULL 42/42] MAINTAINERS: Update my email address

[Peter Maydell]

From: Alistair Francis <alistair.francis@xilinx.com>

I am leaving Xilinx, so to avoid having an email address that bounces
update my maintainer address to point to my personal email address.

Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: Alistair Francis <alistair@alistair23.me>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 7bb690382e3370aa1c1e047a84e36603c787ec0e.1519749987.git.alistair.francis@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 MAINTAINERS | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index a334a25e5d..a76044bee2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -556,7 +556,7 @@ F: hw/misc/arm_sysctl.c
 
 Xilinx Zynq
 M: Edgar E. Iglesias <edgar.iglesias@gmail.com>
-M: Alistair Francis <alistair.francis@xilinx.com>
+M: Alistair Francis <alistair@alistair23.me>
 L: qemu-arm@nongnu.org
 S: Maintained
 F: hw/*/xilinx_*
@@ -566,7 +566,7 @@ F: include/hw/misc/zynq*
 X: hw/ssi/xilinx_*
 
 Xilinx ZynqMP
-M: Alistair Francis <alistair.francis@xilinx.com>
+M: Alistair Francis <alistair@alistair23.me>
 M: Edgar E. Iglesias <edgar.iglesias@gmail.com>
 L: qemu-arm@nongnu.org
 S: Maintained
@@ -1075,7 +1075,7 @@ T: git git://github.com/bonzini/qemu.git scsi-next
 
 SSI
 M: Peter Crosthwaite <crosthwaite.peter@gmail.com>
-M: Alistair Francis <alistair.francis@xilinx.com>
+M: Alistair Francis <alistair@alistair23.me>
 S: Maintained
 F: hw/ssi/*
 F: hw/block/m25p80.c
@@ -1084,7 +1084,7 @@ X: hw/ssi/xilinx_*
 F: tests/m25p80-test.c
 
 Xilinx SPI
-M: Alistair Francis <alistair.francis@xilinx.com>
+M: Alistair Francis <alistair@alistair23.me>
 M: Peter Crosthwaite <crosthwaite.peter@gmail.com>
 S: Maintained
 F: hw/ssi/xilinx_*
@@ -1254,7 +1254,7 @@ S: Maintained
 F: hw/net/eepro100.c
 
 Generic Loader
-M: Alistair Francis <alistair.francis@xilinx.com>
+M: Alistair Francis <alistair@alistair23.me>
 S: Maintained
 F: hw/core/generic-loader.c
 F: include/hw/core/generic-loader.h
@@ -1600,7 +1600,7 @@ F: tests/qmp-test.c
 T: git git://repo.or.cz/qemu/armbru.git qapi-next
 
 Register API
-M: Alistair Francis <alistair.francis@xilinx.com>
+M: Alistair Francis <alistair@alistair23.me>
 S: Maintained
 F: hw/core/register.c
 F: include/hw/register.h
-- 
2.16.2

Re: [Qemu-devel] [PULL 00/42] target-arm queue

[no-reply]

Hi,

This series seems to have some coding style problems. See output below for
more information:

Type: series
Message-id: 20180301112403.12487-1-peter.maydell@linaro.org
Subject: [Qemu-devel] [PULL 00/42] target-arm queue

=== TEST SCRIPT BEGIN ===
#!/bin/bash

BASE=base
n=1
total=$(git log --oneline $BASE.. | wc -l)
failed=0

git config --local diff.renamelimit 0
git config --local diff.renames True
git config --local diff.algorithm histogram

commits="$(git log --format=%H --reverse $BASE..)"
for c in $commits; do
    echo "Checking PATCH $n/$total: $(git log -n 1 --format=%s $c)..."
    if ! git show $c --format=email | ./scripts/checkpatch.pl --mailback -; then
        failed=1
        echo
    fi
    n=$((n+1))
done

exit $failed
=== TEST SCRIPT END ===

Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
From https://github.com/patchew-project/qemu
   5116c331c6..2963d78204  master     -> master
 * [new tag]               patchew/20180301112403.12487-1-peter.maydell@linaro.org -> patchew/20180301112403.12487-1-peter.maydell@linaro.org
Switched to a new branch 'test'
b8d820da8e MAINTAINERS: Update my email address
fafefeede8 linux-user: Report AArch64 FP16 support via hwcap bits
1e47f0c8d0 target/arm: Enable ARM_V8_FP16 feature bit for the AArch64 "any" CPU
a1d78601d3 arm/translate-a64: add all single op FP16 to handle_fp_1src_half
ef1aeecd4b arm/translate-a64: implement simd_scalar_three_reg_same_fp16
6f2836d485 arm/translate-a64: add all FP16 ops in simd_scalar_pairwise
a35291f349 arm/translate-a64: add FP16 FMOV to simd_mod_imm
0a27cbb4ed arm/translate-a64: add FP16 FRSQRTE to simd_two_reg_misc_fp16
0a441b7da4 arm/helper.c: re-factor rsqrte and add rsqrte_f16
da2e0fc44a arm/translate-a64: add FP16 FSQRT to simd_two_reg_misc_fp16
4cef2369d2 arm/translate-a64: add FP16 FRCPX to simd_two_reg_misc_fp16
1b4f1ab980 arm/translate-a64: add FP16 FRECPE
73a9e97036 arm/helper.c: re-factor recpe and add recepe_f16
90ba4bd8c2 arm/translate-a64: add FP16 FNEG/FABS to simd_two_reg_misc_fp16
73fd85ed2b arm/translate-a64: add FP16 SCVTF/UCVFT to simd_two_reg_misc_fp16
f19cc5a183 arm/translate-a64: add FP16 FCMxx (zero) to simd_two_reg_misc_fp16
65f396e589 arm/translate-a64: add FCVTxx to simd_two_reg_misc_fp16
0e24214ab5 arm/translate-a64: add FP16 FPRINTx to simd_two_reg_misc_fp16
f196ce6fe6 arm/translate-a64: initial decode for simd_two_reg_misc_fp16
34d06595e7 arm/translate-a64: add FP16 x2 ops for simd_indexed
1cbb0530d6 arm/translate-a64: add FP16 FMULX/MLS/FMLA to simd_indexed
2784d82ed6 arm/translate-a64: add FP16 pairwise ops simd_three_reg_same_fp16
d384cdd281 arm/translate-a64: add FP16 FR[ECP/SQRT]S to simd_three_reg_same_fp16
8f8a6ce448 arm/translate-a64: add FP16 FMULA/X/S to simd_three_reg_same_fp16
126916bc89 arm/translate-a64: add FP16 F[A]C[EQ/GE/GT] to simd_three_reg_same_fp16
4173362d9a arm/translate-a64: add FP16 FADD/FABD/FSUB/FMUL/FDIV to simd_three_reg_same_fp16
933cd48012 arm/translate-a64: initial decode for simd_three_reg_same_fp16
b990db46a4 arm/translate-a64: handle_3same_64 comment fix
d35bfc6ddd arm/translate-a64: implement half-precision F(MIN|MAX)(V|NMV)
f7b5043d8e target/arm/helper: pass explicit fpst to set_rmode
f4942cc7c8 target/arm/cpu.h: add additional float_status flags
8f2a0f5575 target/arm/cpu.h: update comment for half-precision values
3059f5906d target/arm/cpu64: introduce ARM_V8_FP16 feature bit
aac25f27be include/exec/helper-head.h: support f16 in helper calls
5998ce1e24 arm/vexpress: Add proper display connector emulation
cd734131b2 hw/sii9022: Add support for Silicon Image SII9022
94b945c24d hw/i2c-ddc: Do not fail writes
fb66477d35 i2c: Move the bus class to i2c.h
96b6d99806 i2c: Fix some brace style issues
6fdd76003e xilinx_spips: Use 8 dummy cycles with the QIOR/QIOR4 commands
0a63d14eaa xilinx_spips: Enable only two slaves when reading/writing with stripe
3a5412277e hw: register: Run post_write hook on reset

=== OUTPUT BEGIN ===
Checking PATCH 1/42: hw: register: Run post_write hook on reset...
Checking PATCH 2/42: xilinx_spips: Enable only two slaves when reading/writing with stripe...
Checking PATCH 3/42: xilinx_spips: Use 8 dummy cycles with the QIOR/QIOR4 commands...
Checking PATCH 4/42: i2c: Fix some brace style issues...
Checking PATCH 5/42: i2c: Move the bus class to i2c.h...
Checking PATCH 6/42: hw/i2c-ddc: Do not fail writes...
Checking PATCH 7/42: hw/sii9022: Add support for Silicon Image SII9022...
Checking PATCH 8/42: arm/vexpress: Add proper display connector emulation...
Checking PATCH 9/42: include/exec/helper-head.h: support f16 in helper calls...
Checking PATCH 10/42: target/arm/cpu64: introduce ARM_V8_FP16 feature bit...
Checking PATCH 11/42: target/arm/cpu.h: update comment for half-precision values...
Checking PATCH 12/42: target/arm/cpu.h: add additional float_status flags...
Checking PATCH 13/42: target/arm/helper: pass explicit fpst to set_rmode...
Checking PATCH 14/42: arm/translate-a64: implement half-precision F(MIN|MAX)(V|NMV)...
Checking PATCH 15/42: arm/translate-a64: handle_3same_64 comment fix...
Checking PATCH 16/42: arm/translate-a64: initial decode for simd_three_reg_same_fp16...
Checking PATCH 17/42: arm/translate-a64: add FP16 FADD/FABD/FSUB/FMUL/FDIV to simd_three_reg_same_fp16...
Checking PATCH 18/42: arm/translate-a64: add FP16 F[A]C[EQ/GE/GT] to simd_three_reg_same_fp16...
Checking PATCH 19/42: arm/translate-a64: add FP16 FMULA/X/S to simd_three_reg_same_fp16...
Checking PATCH 20/42: arm/translate-a64: add FP16 FR[ECP/SQRT]S to simd_three_reg_same_fp16...
Checking PATCH 21/42: arm/translate-a64: add FP16 pairwise ops simd_three_reg_same_fp16...
Checking PATCH 22/42: arm/translate-a64: add FP16 FMULX/MLS/FMLA to simd_indexed...
Checking PATCH 23/42: arm/translate-a64: add FP16 x2 ops for simd_indexed...
Checking PATCH 24/42: arm/translate-a64: initial decode for simd_two_reg_misc_fp16...
Checking PATCH 25/42: arm/translate-a64: add FP16 FPRINTx to simd_two_reg_misc_fp16...
Checking PATCH 26/42: arm/translate-a64: add FCVTxx to simd_two_reg_misc_fp16...
Checking PATCH 27/42: arm/translate-a64: add FP16 FCMxx (zero) to simd_two_reg_misc_fp16...
Checking PATCH 28/42: arm/translate-a64: add FP16 SCVTF/UCVFT to simd_two_reg_misc_fp16...
ERROR: space prohibited before that close parenthesis ')'
#28: FILE: target/arm/helper.c:11305:
+FLOAT_CONVS(si, h, 16, )

total: 1 errors, 0 warnings, 208 lines checked

Your patch has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.

Checking PATCH 29/42: arm/translate-a64: add FP16 FNEG/FABS to simd_two_reg_misc_fp16...
Checking PATCH 30/42: arm/helper.c: re-factor recpe and add recepe_f16...
Checking PATCH 31/42: arm/translate-a64: add FP16 FRECPE...
Checking PATCH 32/42: arm/translate-a64: add FP16 FRCPX to simd_two_reg_misc_fp16...
Checking PATCH 33/42: arm/translate-a64: add FP16 FSQRT to simd_two_reg_misc_fp16...
Checking PATCH 34/42: arm/helper.c: re-factor rsqrte and add rsqrte_f16...
Checking PATCH 35/42: arm/translate-a64: add FP16 FRSQRTE to simd_two_reg_misc_fp16...
Checking PATCH 36/42: arm/translate-a64: add FP16 FMOV to simd_mod_imm...
Checking PATCH 37/42: arm/translate-a64: add all FP16 ops in simd_scalar_pairwise...
Checking PATCH 38/42: arm/translate-a64: implement simd_scalar_three_reg_same_fp16...
Checking PATCH 39/42: arm/translate-a64: add all single op FP16 to handle_fp_1src_half...
Checking PATCH 40/42: target/arm: Enable ARM_V8_FP16 feature bit for the AArch64 "any" CPU...
Checking PATCH 41/42: linux-user: Report AArch64 FP16 support via hwcap bits...
Checking PATCH 42/42: MAINTAINERS: Update my email address...
=== OUTPUT END ===

Test command exited with code: 1


---
Email generated automatically by Patchew [http://patchew.org/].
Please send your feedback to patchew-devel@freelists.org

Re: [Qemu-devel] [PULL 00/42] target-arm queue

[no-reply]

Hi,

This series seems to have some coding style problems. See output below for
more information:

Type: series
Message-id: 20180301112403.12487-1-peter.maydell@linaro.org
Subject: [Qemu-devel] [PULL 00/42] target-arm queue

=== TEST SCRIPT BEGIN ===
#!/bin/bash

BASE=base
n=1
total=$(git log --oneline $BASE.. | wc -l)
failed=0

git config --local diff.renamelimit 0
git config --local diff.renames True
git config --local diff.algorithm histogram

commits="$(git log --format=%H --reverse $BASE..)"
for c in $commits; do
    echo "Checking PATCH $n/$total: $(git log -n 1 --format=%s $c)..."
    if ! git show $c --format=email | ./scripts/checkpatch.pl --mailback -; then
        failed=1
        echo
    fi
    n=$((n+1))
done

exit $failed
=== TEST SCRIPT END ===

Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
From https://github.com/patchew-project/qemu
   5116c331c6..2963d78204  master     -> master
 * [new tag]               patchew/20180301112403.12487-1-peter.maydell@linaro.org -> patchew/20180301112403.12487-1-peter.maydell@linaro.org
Switched to a new branch 'test'
b8d820da8e MAINTAINERS: Update my email address
fafefeede8 linux-user: Report AArch64 FP16 support via hwcap bits
1e47f0c8d0 target/arm: Enable ARM_V8_FP16 feature bit for the AArch64 "any" CPU
a1d78601d3 arm/translate-a64: add all single op FP16 to handle_fp_1src_half
ef1aeecd4b arm/translate-a64: implement simd_scalar_three_reg_same_fp16
6f2836d485 arm/translate-a64: add all FP16 ops in simd_scalar_pairwise
a35291f349 arm/translate-a64: add FP16 FMOV to simd_mod_imm
0a27cbb4ed arm/translate-a64: add FP16 FRSQRTE to simd_two_reg_misc_fp16
0a441b7da4 arm/helper.c: re-factor rsqrte and add rsqrte_f16
da2e0fc44a arm/translate-a64: add FP16 FSQRT to simd_two_reg_misc_fp16
4cef2369d2 arm/translate-a64: add FP16 FRCPX to simd_two_reg_misc_fp16
1b4f1ab980 arm/translate-a64: add FP16 FRECPE
73a9e97036 arm/helper.c: re-factor recpe and add recepe_f16
90ba4bd8c2 arm/translate-a64: add FP16 FNEG/FABS to simd_two_reg_misc_fp16
73fd85ed2b arm/translate-a64: add FP16 SCVTF/UCVFT to simd_two_reg_misc_fp16
f19cc5a183 arm/translate-a64: add FP16 FCMxx (zero) to simd_two_reg_misc_fp16
65f396e589 arm/translate-a64: add FCVTxx to simd_two_reg_misc_fp16
0e24214ab5 arm/translate-a64: add FP16 FPRINTx to simd_two_reg_misc_fp16
f196ce6fe6 arm/translate-a64: initial decode for simd_two_reg_misc_fp16
34d06595e7 arm/translate-a64: add FP16 x2 ops for simd_indexed
1cbb0530d6 arm/translate-a64: add FP16 FMULX/MLS/FMLA to simd_indexed
2784d82ed6 arm/translate-a64: add FP16 pairwise ops simd_three_reg_same_fp16
d384cdd281 arm/translate-a64: add FP16 FR[ECP/SQRT]S to simd_three_reg_same_fp16
8f8a6ce448 arm/translate-a64: add FP16 FMULA/X/S to simd_three_reg_same_fp16
126916bc89 arm/translate-a64: add FP16 F[A]C[EQ/GE/GT] to simd_three_reg_same_fp16
4173362d9a arm/translate-a64: add FP16 FADD/FABD/FSUB/FMUL/FDIV to simd_three_reg_same_fp16
933cd48012 arm/translate-a64: initial decode for simd_three_reg_same_fp16
b990db46a4 arm/translate-a64: handle_3same_64 comment fix
d35bfc6ddd arm/translate-a64: implement half-precision F(MIN|MAX)(V|NMV)
f7b5043d8e target/arm/helper: pass explicit fpst to set_rmode
f4942cc7c8 target/arm/cpu.h: add additional float_status flags
8f2a0f5575 target/arm/cpu.h: update comment for half-precision values
3059f5906d target/arm/cpu64: introduce ARM_V8_FP16 feature bit
aac25f27be include/exec/helper-head.h: support f16 in helper calls
5998ce1e24 arm/vexpress: Add proper display connector emulation
cd734131b2 hw/sii9022: Add support for Silicon Image SII9022
94b945c24d hw/i2c-ddc: Do not fail writes
fb66477d35 i2c: Move the bus class to i2c.h
96b6d99806 i2c: Fix some brace style issues
6fdd76003e xilinx_spips: Use 8 dummy cycles with the QIOR/QIOR4 commands
0a63d14eaa xilinx_spips: Enable only two slaves when reading/writing with stripe
3a5412277e hw: register: Run post_write hook on reset

=== OUTPUT BEGIN ===
Checking PATCH 1/42: hw: register: Run post_write hook on reset...
Checking PATCH 2/42: xilinx_spips: Enable only two slaves when reading/writing with stripe...
Checking PATCH 3/42: xilinx_spips: Use 8 dummy cycles with the QIOR/QIOR4 commands...
Checking PATCH 4/42: i2c: Fix some brace style issues...
Checking PATCH 5/42: i2c: Move the bus class to i2c.h...
Checking PATCH 6/42: hw/i2c-ddc: Do not fail writes...
Checking PATCH 7/42: hw/sii9022: Add support for Silicon Image SII9022...
Checking PATCH 8/42: arm/vexpress: Add proper display connector emulation...
Checking PATCH 9/42: include/exec/helper-head.h: support f16 in helper calls...
Checking PATCH 10/42: target/arm/cpu64: introduce ARM_V8_FP16 feature bit...
Checking PATCH 11/42: target/arm/cpu.h: update comment for half-precision values...
Checking PATCH 12/42: target/arm/cpu.h: add additional float_status flags...
Checking PATCH 13/42: target/arm/helper: pass explicit fpst to set_rmode...
Checking PATCH 14/42: arm/translate-a64: implement half-precision F(MIN|MAX)(V|NMV)...
Checking PATCH 15/42: arm/translate-a64: handle_3same_64 comment fix...
Checking PATCH 16/42: arm/translate-a64: initial decode for simd_three_reg_same_fp16...
Checking PATCH 17/42: arm/translate-a64: add FP16 FADD/FABD/FSUB/FMUL/FDIV to simd_three_reg_same_fp16...
Checking PATCH 18/42: arm/translate-a64: add FP16 F[A]C[EQ/GE/GT] to simd_three_reg_same_fp16...
Checking PATCH 19/42: arm/translate-a64: add FP16 FMULA/X/S to simd_three_reg_same_fp16...
Checking PATCH 20/42: arm/translate-a64: add FP16 FR[ECP/SQRT]S to simd_three_reg_same_fp16...
Checking PATCH 21/42: arm/translate-a64: add FP16 pairwise ops simd_three_reg_same_fp16...
Checking PATCH 22/42: arm/translate-a64: add FP16 FMULX/MLS/FMLA to simd_indexed...
Checking PATCH 23/42: arm/translate-a64: add FP16 x2 ops for simd_indexed...
Checking PATCH 24/42: arm/translate-a64: initial decode for simd_two_reg_misc_fp16...
Checking PATCH 25/42: arm/translate-a64: add FP16 FPRINTx to simd_two_reg_misc_fp16...
Checking PATCH 26/42: arm/translate-a64: add FCVTxx to simd_two_reg_misc_fp16...
Checking PATCH 27/42: arm/translate-a64: add FP16 FCMxx (zero) to simd_two_reg_misc_fp16...
Checking PATCH 28/42: arm/translate-a64: add FP16 SCVTF/UCVFT to simd_two_reg_misc_fp16...
ERROR: space prohibited before that close parenthesis ')'
#28: FILE: target/arm/helper.c:11305:
+FLOAT_CONVS(si, h, 16, )

total: 1 errors, 0 warnings, 208 lines checked

Your patch has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.

Checking PATCH 29/42: arm/translate-a64: add FP16 FNEG/FABS to simd_two_reg_misc_fp16...
Checking PATCH 30/42: arm/helper.c: re-factor recpe and add recepe_f16...
Checking PATCH 31/42: arm/translate-a64: add FP16 FRECPE...
Checking PATCH 32/42: arm/translate-a64: add FP16 FRCPX to simd_two_reg_misc_fp16...
Checking PATCH 33/42: arm/translate-a64: add FP16 FSQRT to simd_two_reg_misc_fp16...
Checking PATCH 34/42: arm/helper.c: re-factor rsqrte and add rsqrte_f16...
Checking PATCH 35/42: arm/translate-a64: add FP16 FRSQRTE to simd_two_reg_misc_fp16...
Checking PATCH 36/42: arm/translate-a64: add FP16 FMOV to simd_mod_imm...
Checking PATCH 37/42: arm/translate-a64: add all FP16 ops in simd_scalar_pairwise...
Checking PATCH 38/42: arm/translate-a64: implement simd_scalar_three_reg_same_fp16...
Checking PATCH 39/42: arm/translate-a64: add all single op FP16 to handle_fp_1src_half...
Checking PATCH 40/42: target/arm: Enable ARM_V8_FP16 feature bit for the AArch64 "any" CPU...
Checking PATCH 41/42: linux-user: Report AArch64 FP16 support via hwcap bits...
Checking PATCH 42/42: MAINTAINERS: Update my email address...
=== OUTPUT END ===

Test command exited with code: 1


---
Email generated automatically by Patchew [http://patchew.org/].
Please send your feedback to patchew-devel@freelists.org

Re: [Qemu-devel] [PULL 00/42] target-arm queue

[Peter Maydell]

On 1 March 2018 at 13:00,  <no-reply@patchew.org> wrote:
> Hi,
>
> This series seems to have some coding style problems. See output below for
> more information:
>
> Type: series
> Message-id: 20180301112403.12487-1-peter.maydell@linaro.org
> Subject: [Qemu-devel] [PULL 00/42] target-arm queue

Fam -- any idea why patchew sent two checkpatch-issues emails for
this patchset ? The Message-IDs are:
<151990924540.1290.18181910407458585370@bdbb90650ae5>
<151990926291.1290.9842237231347453757@bdbb90650ae5>

thanks
-- PMM

Re: [Qemu-devel] [PULL 00/42] target-arm queue

[Peter Maydell]

On 1 March 2018 at 11:23, Peter Maydell <peter.maydell@linaro.org> wrote:
> Arm queue -- I have more stuff pending but I prefer to push
> this first lot out and keep the pull below 50 patches.
> Most of this is Alex's FP16 support work.
>
> -- PMM
>
>
> The following changes since commit 6697439794f72b3501ee16bb95d16854f9981421:
>
>   Merge remote-tracking branch 'remotes/kraxel/tags/usb-20180227-pull-request' into staging (2018-02-27 17:50:46 +0000)
>
> are available in the Git repository at:
>
>   git://git.linaro.org/people/pmaydell/qemu-arm.git tags/pull-target-arm-20180301
>
> for you to fetch changes up to c22e580c2ad1cccef582e1490e732f254d4ac064:
>
>   MAINTAINERS: Update my email address (2018-03-01 11:13:59 +0000)
>
> ----------------------------------------------------------------
> target-arm queue:
>  * update MAINTAINERS for Alistair's new email address
>  * add Arm v8.2 FP16 arithmetic extension for linux-user
>  * implement display connector emulation for vexpress board
>  * xilinx_spips: Enable only two slaves when reading/writing with stripe
>  * xilinx_spips: Use 8 dummy cycles with the QIOR/QIOR4 commands
>  * hw: register: Run post_write hook on reset
>
> ----------------------------------------------------------------

Applied, thanks.

-- PMM

Re: [Qemu-devel] [PULL 00/42] target-arm queue

[Fam Zheng]

On Thu, Mar 1, 2018 at 10:45 PM, Peter Maydell <peter.maydell@linaro.org> wrote:
> On 1 March 2018 at 13:00,  <no-reply@patchew.org> wrote:
>> Hi,
>>
>> This series seems to have some coding style problems. See output below for
>> more information:
>>
>> Type: series
>> Message-id: 20180301112403.12487-1-peter.maydell@linaro.org
>> Subject: [Qemu-devel] [PULL 00/42] target-arm queue
>
> Fam -- any idea why patchew sent two checkpatch-issues emails for
> this patchset ? The Message-IDs are:
> <151990924540.1290.18181910407458585370@bdbb90650ae5>
> <151990926291.1290.9842237231347453757@bdbb90650ae5>

A bug in patchew. The server dispatched the checkpatch task to two testers
when they asked for more work to do. One of them shouldn't happen.
I've worked around this in the config
(filtering the task into only one tester) now.

I created an issue.

https://github.com/patchew-project/patchew/issues/63

Fam