[PATCH 24/36] target/arm: Convert Neon VHADD 3-reg-same insns

[Peter Maydell <peter.maydell@linaro.org>]

Convert the Neon VHADD insns in the 3-reg-same group to decodetree.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/translate-neon.inc.c | 62 +++++++++++++++++++++++++++++++++
 target/arm/translate.c          |  4 +--
 target/arm/neon-dp.decode       |  2 ++
 3 files changed, 65 insertions(+), 3 deletions(-)

diff --git a/target/arm/translate-neon.inc.c b/target/arm/translate-neon.inc.c
index bc5afb368e3..7a602d76566 100644
--- a/target/arm/translate-neon.inc.c
+++ b/target/arm/translate-neon.inc.c
@@ -970,3 +970,65 @@ DO_3SAME_64_ENV(VQSHL_S64, gen_helper_neon_qshl_s64)
 DO_3SAME_64_ENV(VQSHL_U64, gen_helper_neon_qshl_u64)
 DO_3SAME_64_ENV(VQRSHL_S64, gen_helper_neon_qrshl_s64)
 DO_3SAME_64_ENV(VQRSHL_U64, gen_helper_neon_qrshl_u64)
+
+static bool do_3same_32(DisasContext *s, arg_3same *a, NeonGenTwoOpFn *fn)
+{
+    /* Operations handled elementwise 32 bits at a time */
+    TCGv_i32 tmp, tmp2;
+    int pass;
+
+    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->vn | a->vm | a->vd) & a->q) {
+        return false;
+    }
+
+    if (!vfp_access_check(s)) {
+        return true;
+    }
+
+    for (pass = 0; pass < (a->q ? 4 : 2); pass++) {
+        tmp = neon_load_reg(a->vn, pass);
+        tmp2 = neon_load_reg(a->vm, pass);
+        fn(tmp, tmp, tmp2);
+        tcg_temp_free_i32(tmp2);
+        neon_store_reg(a->vd, pass, tmp);
+    }
+    return true;
+}
+
+#define DO_3SAME_32(INSN, func)                                         \
+    static bool trans_##INSN##_S_3s(DisasContext *s, arg_3same *a)      \
+    {                                                                   \
+        static NeonGenTwoOpFn * const fns[] = {                         \
+            gen_helper_neon_##func##_s8,                                \
+            gen_helper_neon_##func##_s16,                               \
+            gen_helper_neon_##func##_s32,                               \
+        };                                                              \
+        if (a->size > 2) {                                              \
+            return false;                                               \
+        }                                                               \
+        return do_3same_32(s, a, fns[a->size]);                         \
+    }                                                                   \
+    static bool trans_##INSN##_U_3s(DisasContext *s, arg_3same *a)      \
+    {                                                                   \
+        static NeonGenTwoOpFn * const fns[] = {                         \
+            gen_helper_neon_##func##_u8,                                \
+            gen_helper_neon_##func##_u16,                               \
+            gen_helper_neon_##func##_u32,                               \
+        };                                                              \
+        if (a->size > 2) {                                              \
+            return false;                                               \
+        }                                                               \
+        return do_3same_32(s, a, fns[a->size]);                         \
+    }
+
+DO_3SAME_32(VHADD, hadd)
diff --git a/target/arm/translate.c b/target/arm/translate.c
index fb64eb3a800..67616fc218a 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -4786,6 +4786,7 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
         case NEON_3R_VML:
         case NEON_3R_VSHL:
         case NEON_3R_SHA:
+        case NEON_3R_VHADD:
             /* Already handled by decodetree */
             return 1;
         }
@@ -4866,9 +4867,6 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
             tmp2 = neon_load_reg(rm, pass);
         }
         switch (op) {
-        case NEON_3R_VHADD:
-            GEN_NEON_INTEGER_OP(hadd);
-            break;
         case NEON_3R_VRHADD:
             GEN_NEON_INTEGER_OP(rhadd);
             break;
diff --git a/target/arm/neon-dp.decode b/target/arm/neon-dp.decode
index a4932e550ed..055004df4e8 100644
--- a/target/arm/neon-dp.decode
+++ b/target/arm/neon-dp.decode
@@ -42,6 +42,8 @@
 @3same           .... ... . . . size:2 .... .... .... . q:1 . . .... \
                  &3same vm=%vm_dp vn=%vn_dp vd=%vd_dp
 
+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
 VQADD_U_3s       1111 001 1 0 . .. .... .... 0000 . . . 1 .... @3same
 
-- 
2.20.1