From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-arm@nongnu.org, qemu-devel@nongnu.org
Cc: Richard Henderson <richard.henderson@linaro.org>
Subject: [PATCH 02/10] target/arm: Convert Neon VSHL and VSLI 2-reg-shift insn to decodetree
Date: Fri, 15 May 2020 15:20:48 +0100 [thread overview]
Message-ID: <20200515142056.21346-3-peter.maydell@linaro.org> (raw)
In-Reply-To: <20200515142056.21346-1-peter.maydell@linaro.org>
Convert the VSHL and VSLI insns from the Neon 2-registers-and-a-shift
group to decodetree.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
target/arm/neon-dp.decode | 27 +++++++++++++++++++++++
target/arm/translate-neon.inc.c | 38 +++++++++++++++++++++++++++++++++
target/arm/translate.c | 18 +++++++---------
3 files changed, 73 insertions(+), 10 deletions(-)
diff --git a/target/arm/neon-dp.decode b/target/arm/neon-dp.decode
index 8beb1db768b..df7b4798a5a 100644
--- a/target/arm/neon-dp.decode
+++ b/target/arm/neon-dp.decode
@@ -199,3 +199,30 @@ VRECPS_fp_3s 1111 001 0 0 . 0 . .... .... 1111 ... 1 .... @3same_fp
VRSQRTS_fp_3s 1111 001 0 0 . 1 . .... .... 1111 ... 1 .... @3same_fp
VMAXNM_fp_3s 1111 001 1 0 . 0 . .... .... 1111 ... 1 .... @3same_fp
VMINNM_fp_3s 1111 001 1 0 . 1 . .... .... 1111 ... 1 .... @3same_fp
+
+######################################################################
+# 2-reg-and-shift grouping:
+# 1111 001 U 1 D immH:3 immL:3 Vd:4 opc:4 L Q M 1 Vm:4
+######################################################################
+&2reg_shift vm vd q shift size
+
+@2reg_shift .... ... . . . ...... .... .... . q:1 . . .... \
+ &2reg_shift vm=%vm_dp vd=%vd_dp
+
+VSHL_2sh 1111 001 0 1 . shift:6 .... 0101 1 . . 1 .... \
+ @2reg_shift size=3
+VSHL_2sh 1111 001 0 1 . 1 shift:5 .... 0101 0 . . 1 .... \
+ @2reg_shift size=2
+VSHL_2sh 1111 001 0 1 . 01 shift:4 .... 0101 0 . . 1 .... \
+ @2reg_shift size=1
+VSHL_2sh 1111 001 0 1 . 001 shift:3 .... 0101 0 . . 1 .... \
+ @2reg_shift size=0
+
+VSLI_2sh 1111 001 1 1 . shift:6 .... 0101 1 . . 1 .... \
+ @2reg_shift size=3
+VSLI_2sh 1111 001 1 1 . 1 shift:5 .... 0101 0 . . 1 .... \
+ @2reg_shift size=2
+VSLI_2sh 1111 001 1 1 . 01 shift:4 .... 0101 0 . . 1 .... \
+ @2reg_shift size=1
+VSLI_2sh 1111 001 1 1 . 001 shift:3 .... 0101 0 . . 1 .... \
+ @2reg_shift size=0
diff --git a/target/arm/translate-neon.inc.c b/target/arm/translate-neon.inc.c
index 3fe65a0b080..305213fe6d9 100644
--- a/target/arm/translate-neon.inc.c
+++ b/target/arm/translate-neon.inc.c
@@ -1310,3 +1310,41 @@ static bool do_3same_fp_pair(DisasContext *s, arg_3same *a, VFPGen3OpSPFn *fn)
DO_3S_FP_PAIR(VPADD, gen_helper_vfp_adds)
DO_3S_FP_PAIR(VPMAX, gen_helper_vfp_maxs)
DO_3S_FP_PAIR(VPMIN, gen_helper_vfp_mins)
+
+static bool do_vector_2sh(DisasContext *s, arg_2reg_shift *a, GVecGen2iFn *fn)
+{
+ /* Handle a 2-reg-shift insn which can be vectorized. */
+ int vec_size = a->q ? 16 : 8;
+ int rd_ofs = neon_reg_offset(a->vd, 0);
+ int rm_ofs = neon_reg_offset(a->vm, 0);
+
+ if (!arm_dc_feature(s, ARM_FEATURE_NEON)) {
+ return false;
+ }
+
+ /* UNDEF accesses to D16-D31 if they don't exist. */
+ if (!dc_isar_feature(aa32_simd_r32, s) &&
+ ((a->vd | a->vm) & 0x10)) {
+ return false;
+ }
+
+ if ((a->vm | a->vd) & a->q) {
+ return false;
+ }
+
+ if (!vfp_access_check(s)) {
+ return true;
+ }
+
+ fn(a->size, rd_ofs, rm_ofs, a->shift, vec_size, vec_size);
+ return true;
+}
+
+#define DO_2SH(INSN, FUNC) \
+ static bool trans_##INSN##_2sh(DisasContext *s, arg_2reg_shift *a) \
+ { \
+ return do_vector_2sh(s, a, FUNC); \
+ } \
+
+DO_2SH(VSHL, tcg_gen_gvec_shli)
+DO_2SH(VSLI, gen_gvec_sli)
diff --git a/target/arm/translate.c b/target/arm/translate.c
index c8296116d4b..d0a4a08f6d9 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -5294,6 +5294,14 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
if ((insn & 0x00380080) != 0) {
/* Two registers and shift. */
op = (insn >> 8) & 0xf;
+
+ switch (op) {
+ case 5: /* VSHL, VSLI */
+ return 1; /* handled by decodetree */
+ default:
+ break;
+ }
+
if (insn & (1 << 7)) {
/* 64-bit shift. */
if (op > 7) {
@@ -5387,16 +5395,6 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
gen_gvec_sri(size, rd_ofs, rm_ofs, shift,
vec_size, vec_size);
return 0;
-
- case 5: /* VSHL, VSLI */
- if (u) { /* VSLI */
- gen_gvec_sli(size, rd_ofs, rm_ofs, shift,
- vec_size, vec_size);
- } else { /* VSHL */
- tcg_gen_gvec_shli(size, rd_ofs, rm_ofs, shift,
- vec_size, vec_size);
- }
- return 0;
}
if (size == 3) {
--
2.20.1
next prev parent reply other threads:[~2020-05-15 14:22 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-15 14:20 [PATCH 00/10] target/arm: Convert 2-reg-shift and 1-reg-imm Neon insns to decodetree Peter Maydell
2020-05-15 14:20 ` [PATCH 01/10] target/arm: Remove unused GEN_NEON_INTEGER_OP macro Peter Maydell
2020-05-15 22:07 ` Richard Henderson
2020-05-15 14:20 ` Peter Maydell [this message]
2020-05-15 22:16 ` [PATCH 02/10] target/arm: Convert Neon VSHL and VSLI 2-reg-shift insn to decodetree Richard Henderson
2020-05-15 14:20 ` [PATCH 03/10] target/arm: Convert Neon VSHR 2-reg-shift insns " Peter Maydell
2020-05-15 22:33 ` Richard Henderson
2020-05-15 22:48 ` Richard Henderson
2020-05-15 14:20 ` [PATCH 04/10] target/arm: Convert Neon VSRA, VSRI, VRSHR, VRSRA " Peter Maydell
2020-05-15 22:50 ` Richard Henderson
2020-05-15 14:20 ` [PATCH 05/10] target/arm: Convert VQSHLU, VQSHL " Peter Maydell
2020-05-15 22:55 ` Richard Henderson
2020-05-15 14:20 ` [PATCH 06/10] target/arm: Convert Neon narrowing shifts with op==8 " Peter Maydell
2020-05-16 2:01 ` Richard Henderson
2020-05-15 14:20 ` [PATCH 07/10] target/arm: Convert Neon narrowing shifts with op==9 " Peter Maydell
2020-05-16 2:05 ` Richard Henderson
2020-05-15 14:20 ` [PATCH 08/10] target/arm: Convert Neon VSHLL, VMOVL " Peter Maydell
2020-05-16 2:18 ` Richard Henderson
2020-05-15 14:20 ` [PATCH 09/10] target/arm: Convert VCVT fixed-point ops " Peter Maydell
2020-05-16 2:27 ` Richard Henderson
2020-05-15 14:20 ` [PATCH 10/10] target/arm: Convert Neon one-register-and-immediate insns " Peter Maydell
2020-05-16 2:50 ` Richard Henderson
2020-05-22 14:31 ` Peter Maydell
2020-05-15 21:32 ` [PATCH 00/10] target/arm: Convert 2-reg-shift and 1-reg-imm Neon " no-reply
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