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target/arm: Convert VMUL to decodetree 

Convert the VMUL instruction to decodetree.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Peter Maydell 2019-06-11 16:39:47 +01:00
parent 8a483533ad
commit 88c5188ced
3 changed files with 16 additions and 4 deletions
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10
target/arm/translate-vfp.inc.c
View File

@ -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);
}

5
target/arm/translate.c
View File

@ -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);

5
target/arm/vfp.decode
View File

@ -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