target/arm: Use gvec for NEON_3R_VMUL

Signed-off-by: NRichard Henderson <richard.henderson@linaro.org>
Message-id: 20181011205206.3552-12-richard.henderson@linaro.org
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

target/arm/translate.c

@@ -5959,6 +5959,19 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
                                  vec_size, vec_size);
             }
             return 0;
+
+        case NEON_3R_VMUL: /* VMUL */
+            if (u) {
+                /* Polynomial case allows only P8 and is handled below.  */
+                if (size != 0) {
+                    return 1;
+                }
+            } else {
+                tcg_gen_gvec_mul(size, rd_ofs, rn_ofs, rm_ofs,
+                                 vec_size, vec_size);
+                return 0;
+            }
+            break;
         }
         if (size == 3) {
             /* 64-bit element instructions. */
@@ -6065,12 +6078,6 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
                 return 1;
             }
             break;
-        case NEON_3R_VMUL:
-            if (u && (size != 0)) {
-                /* UNDEF on invalid size for polynomial subcase */
-                return 1;
-            }
-            break;
         case NEON_3R_VFM_VQRDMLSH:
             if (!arm_dc_feature(s, ARM_FEATURE_VFP4)) {
                 return 1;
@@ -6183,16 +6190,8 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
             }
             break;
         case NEON_3R_VMUL:
-            if (u) { /* polynomial */
-                gen_helper_neon_mul_p8(tmp, tmp, tmp2);
-            } else { /* Integer */
-                switch (size) {
-                case 0: gen_helper_neon_mul_u8(tmp, tmp, tmp2); break;
-                case 1: gen_helper_neon_mul_u16(tmp, tmp, tmp2); break;
-                case 2: tcg_gen_mul_i32(tmp, tmp, tmp2); break;
-                default: abort();
-                }
-            }
+            /* VMUL.P8; other cases already eliminated.  */
+            gen_helper_neon_mul_p8(tmp, tmp, tmp2);
             break;
         case NEON_3R_VPMAX:
             GEN_NEON_INTEGER_OP(pmax);