target/arm: Convert VMUL to decodetree

Convert the VMUL instruction to decodetree.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NRichard Henderson <richard.henderson@linaro.org>

target/arm/translate-vfp.inc.c

@@ -1417,3 +1417,13 @@ static bool trans_VNMLA_dp(DisasContext *s, arg_VNMLA_sp *a)
 {
     return do_vfp_3op_dp(s, gen_VNMLA_dp, a->vd, a->vn, a->vm, true);
 }
+
+static bool trans_VMUL_sp(DisasContext *s, arg_VMUL_sp *a)
+{
+    return do_vfp_3op_sp(s, gen_helper_vfp_muls, a->vd, a->vn, a->vm, false);
+}
+
+static bool trans_VMUL_dp(DisasContext *s, arg_VMUL_sp *a)
+{
+    return do_vfp_3op_dp(s, gen_helper_vfp_muld, a->vd, a->vn, a->vm, false);
+}

target/arm/translate.c

@@ -3112,7 +3112,7 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
             rn = VFP_SREG_N(insn);
 
             switch (op) {
-            case 0 ... 3:
+            case 0 ... 4:
                 /* Already handled by decodetree */
                 return 1;
             default:
@@ -3298,9 +3298,6 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
             for (;;) {
                 /* Perform the calculation.  */
                 switch (op) {
-                case 4: /* mul: fn * fm */
-                    gen_vfp_mul(dp);
-                    break;
                 case 5: /* nmul: -(fn * fm) */
                     gen_vfp_mul(dp);
                     gen_vfp_neg(dp);

target/arm/vfp.decode

@@ -117,3 +117,8 @@ VNMLA_sp     ---- 1110 0.01 .... .... 1010 .1.0 .... \
              vm=%vm_sp vn=%vn_sp vd=%vd_sp
 VNMLA_dp     ---- 1110 0.01 .... .... 1011 .1.0 .... \
              vm=%vm_dp vn=%vn_dp vd=%vd_dp
+
+VMUL_sp      ---- 1110 0.10 .... .... 1010 .0.0 .... \
+             vm=%vm_sp vn=%vn_sp vd=%vd_sp
+VMUL_dp      ---- 1110 0.10 .... .... 1011 .0.0 .... \
+             vm=%vm_dp vn=%vn_dp vd=%vd_dp