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 v2 08/17] target/arm: Convert Neon VPMAX/VPMIN 3-reg-same insns to decodetree
Date: Tue, 12 May 2020 17:38:55 +0100 [thread overview]
Message-ID: <20200512163904.10918-9-peter.maydell@linaro.org> (raw)
In-Reply-To: <20200512163904.10918-1-peter.maydell@linaro.org>
Convert the Neon integer VPMAX and VPMIN 3-reg-same insns to
decodetree. These are 'pairwise' operations.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/neon-dp.decode | 9 +++++
target/arm/translate-neon.inc.c | 71 +++++++++++++++++++++++++++++++++
target/arm/translate.c | 17 +-------
3 files changed, 82 insertions(+), 15 deletions(-)
diff --git a/target/arm/neon-dp.decode b/target/arm/neon-dp.decode
index e0da5a39fc2..03f39a0b44b 100644
--- a/target/arm/neon-dp.decode
+++ b/target/arm/neon-dp.decode
@@ -42,6 +42,9 @@
@3same .... ... . . . size:2 .... .... .... . q:1 . . .... \
&3same vm=%vm_dp vn=%vn_dp vd=%vd_dp
+@3same_q0 .... ... . . . size:2 .... .... .... . 0 . . .... \
+ &3same vm=%vm_dp vn=%vn_dp vd=%vd_dp q=0
+
VHADD_S_3s 1111 001 0 0 . .. .... .... 0000 . . . 0 .... @3same
VHADD_U_3s 1111 001 1 0 . .. .... .... 0000 . . . 0 .... @3same
VQADD_S_3s 1111 001 0 0 . .. .... .... 0000 . . . 1 .... @3same
@@ -144,6 +147,12 @@ VMLS_3s 1111 001 1 0 . .. .... .... 1001 . . . 0 .... @3same
VMUL_3s 1111 001 0 0 . .. .... .... 1001 . . . 1 .... @3same
VMUL_p_3s 1111 001 1 0 . .. .... .... 1001 . . . 1 .... @3same
+VPMAX_S_3s 1111 001 0 0 . .. .... .... 1010 . . . 0 .... @3same_q0
+VPMAX_U_3s 1111 001 1 0 . .. .... .... 1010 . . . 0 .... @3same_q0
+
+VPMIN_S_3s 1111 001 0 0 . .. .... .... 1010 . . . 1 .... @3same_q0
+VPMIN_U_3s 1111 001 1 0 . .. .... .... 1010 . . . 1 .... @3same_q0
+
VQRDMLAH_3s 1111 001 1 0 . .. .... .... 1011 ... 1 .... @3same
SHA1_3s 1111 001 0 0 . optype:2 .... .... 1100 . 1 . 0 .... \
diff --git a/target/arm/translate-neon.inc.c b/target/arm/translate-neon.inc.c
index 7097c18f334..7db6b856598 100644
--- a/target/arm/translate-neon.inc.c
+++ b/target/arm/translate-neon.inc.c
@@ -924,3 +924,74 @@ DO_3SAME_32_ENV(VQSHL_S, qshl_s)
DO_3SAME_32_ENV(VQSHL_U, qshl_u)
DO_3SAME_32_ENV(VQRSHL_S, qrshl_s)
DO_3SAME_32_ENV(VQRSHL_U, qrshl_u)
+
+static bool do_3same_pair(DisasContext *s, arg_3same *a, NeonGenTwoOpFn *fn)
+{
+ /* Operations handled pairwise 32 bits at a time */
+ TCGv_i32 tmp, tmp2, tmp3;
+
+ 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->vn | a->vm) & 0x10)) {
+ return false;
+ }
+
+ if (a->size == 3) {
+ return false;
+ }
+
+ if (!vfp_access_check(s)) {
+ return true;
+ }
+
+ assert(a->q == 0); /* enforced by decode patterns */
+
+ /*
+ * Note that we have to be careful not to clobber the source operands
+ * in the "vm == vd" case by storing the result of the first pass too
+ * early. Since Q is 0 there are always just two passes, so instead
+ * of a complicated loop over each pass we just unroll.
+ */
+ tmp = neon_load_reg(a->vn, 0);
+ tmp2 = neon_load_reg(a->vn, 1);
+ fn(tmp, tmp, tmp2);
+ tcg_temp_free_i32(tmp2);
+
+ tmp3 = neon_load_reg(a->vm, 0);
+ tmp2 = neon_load_reg(a->vm, 1);
+ fn(tmp3, tmp3, tmp2);
+ tcg_temp_free_i32(tmp2);
+
+ neon_store_reg(a->vd, 0, tmp);
+ neon_store_reg(a->vd, 1, tmp3);
+ return true;
+}
+
+#define DO_3SAME_PAIR(INSN, func) \
+ static bool trans_##INSN##_3s(DisasContext *s, arg_3same *a) \
+ { \
+ static NeonGenTwoOpFn * const fns[] = { \
+ gen_helper_neon_##func##8, \
+ gen_helper_neon_##func##16, \
+ gen_helper_neon_##func##32, \
+ }; \
+ if (a->size > 2) { \
+ return false; \
+ } \
+ return do_3same_pair(s, a, fns[a->size]); \
+ }
+
+/* 32-bit pairwise ops end up the same as the elementwise versions. */
+#define gen_helper_neon_pmax_s32 tcg_gen_smax_i32
+#define gen_helper_neon_pmax_u32 tcg_gen_umax_i32
+#define gen_helper_neon_pmin_s32 tcg_gen_smin_i32
+#define gen_helper_neon_pmin_u32 tcg_gen_umin_i32
+
+DO_3SAME_PAIR(VPMAX_S, pmax_s)
+DO_3SAME_PAIR(VPMIN_S, pmin_s)
+DO_3SAME_PAIR(VPMAX_U, pmax_u)
+DO_3SAME_PAIR(VPMIN_U, pmin_u)
diff --git a/target/arm/translate.c b/target/arm/translate.c
index 3aabb18720b..82be4d40282 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -3011,12 +3011,6 @@ static inline void gen_neon_rsb(int size, TCGv_i32 t0, TCGv_i32 t1)
}
}
-/* 32-bit pairwise ops end up the same as the elementwise versions. */
-#define gen_helper_neon_pmax_s32 tcg_gen_smax_i32
-#define gen_helper_neon_pmax_u32 tcg_gen_umax_i32
-#define gen_helper_neon_pmin_s32 tcg_gen_smin_i32
-#define gen_helper_neon_pmin_u32 tcg_gen_umin_i32
-
#define GEN_NEON_INTEGER_OP_ENV(name) do { \
switch ((size << 1) | u) { \
case 0: \
@@ -5442,6 +5436,8 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
case NEON_3R_VQSHL:
case NEON_3R_VRSHL:
case NEON_3R_VQRSHL:
+ case NEON_3R_VPMAX:
+ case NEON_3R_VPMIN:
/* Already handled by decodetree */
return 1;
}
@@ -5453,8 +5449,6 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
pairwise = 0;
switch (op) {
case NEON_3R_VPADD_VQRDMLAH:
- case NEON_3R_VPMAX:
- case NEON_3R_VPMIN:
pairwise = 1;
break;
case NEON_3R_FLOAT_ARITH:
@@ -5511,13 +5505,6 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
tmp2 = neon_load_reg(rm, pass);
}
switch (op) {
- break;
- case NEON_3R_VPMAX:
- GEN_NEON_INTEGER_OP(pmax);
- break;
- case NEON_3R_VPMIN:
- GEN_NEON_INTEGER_OP(pmin);
- break;
case NEON_3R_VQDMULH_VQRDMULH: /* Multiply high. */
if (!u) { /* VQDMULH */
switch (size) {
--
2.20.1
next prev parent reply other threads:[~2020-05-12 16:46 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-12 16:38 [PATCH v2 00/17] target/arm: Convert rest of Neon 3-reg-same to decodetree Peter Maydell
2020-05-12 16:38 ` [PATCH v2 01/17] target/arm: Convert Neon 3-reg-same VQRDMLAH/VQRDMLSH " Peter Maydell
2020-05-13 16:39 ` Richard Henderson
2020-05-12 16:38 ` [PATCH v2 02/17] target/arm: Convert Neon 3-reg-same SHA " Peter Maydell
2020-05-12 16:38 ` [PATCH v2 03/17] target/arm: Convert Neon 64-bit element 3-reg-same insns Peter Maydell
2020-05-13 20:27 ` Richard Henderson
2020-05-12 16:38 ` [PATCH v2 04/17] target/arm: Convert Neon VHADD " Peter Maydell
2020-05-13 16:47 ` Richard Henderson
2020-05-12 16:38 ` [PATCH v2 05/17] target/arm: Convert Neon VABA/VABD 3-reg-same to decodetree Peter Maydell
2020-05-13 16:48 ` Richard Henderson
2020-05-12 16:38 ` [PATCH v2 06/17] target/arm: Convert Neon VRHADD, VHSUB 3-reg-same insns " Peter Maydell
2020-05-13 16:50 ` Richard Henderson
2020-05-12 16:38 ` [PATCH v2 07/17] target/arm: Convert Neon VQSHL, VRSHL, VQRSHL " Peter Maydell
2020-05-13 16:55 ` Richard Henderson
2020-05-12 16:38 ` Peter Maydell [this message]
2020-05-12 16:38 ` [PATCH v2 09/17] target/arm: Convert Neon VPADD " Peter Maydell
2020-05-12 16:38 ` [PATCH v2 10/17] target/arm: Convert Neon VQDMULH/VQRDMULH 3-reg-same " Peter Maydell
2020-05-13 16:58 ` Richard Henderson
2020-05-12 16:38 ` [PATCH v2 11/17] target/arm: Convert Neon VADD, VSUB, VABD 3-reg-same insns " Peter Maydell
2020-05-13 20:06 ` Richard Henderson
2020-05-12 16:38 ` [PATCH v2 12/17] target/arm: Convert Neon VPMIN/VPMAX/VPADD float " Peter Maydell
2020-05-12 16:39 ` [PATCH v2 13/17] target/arm: Convert Neon fp VMUL, VMLA, VMLS " Peter Maydell
2020-05-13 20:28 ` Richard Henderson
2020-05-12 16:39 ` [PATCH v2 14/17] target/arm: Convert Neon 3-reg-same compare " Peter Maydell
2020-05-12 16:39 ` [PATCH v2 15/17] target/arm: Move 'env' argument of recps_f32 and rsqrts_f32 helpers to usual place Peter Maydell
2020-05-13 20:16 ` Richard Henderson
2020-05-12 16:39 ` [PATCH v2 16/17] target/arm: Convert Neon fp VMAX/VMIN/VMAXNM/VMINNM/VRECPS/VRSQRTS to decodetree Peter Maydell
2020-05-13 20:20 ` Richard Henderson
2020-05-12 16:39 ` [PATCH v2 17/17] target/arm: Convert NEON VFMA, VFMS 3-reg-same insns " Peter Maydell
2020-05-12 23:44 ` [PATCH v2 00/17] target/arm: Convert rest of Neon 3-reg-same " no-reply
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