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target/arm: Convert VSUB to decodetree

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Convert the VSUB 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 16:39:48 +01:00
parent ce28b30371
commit 8fec9a1192
3 changed files with 16 additions and 5 deletions
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10
target/arm/translate-vfp.inc.c
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@ -1461,3 +1461,13 @@ static bool trans_VADD_dp(DisasContext *s, arg_VADD_sp *a)
{
return do_vfp_3op_dp(s, gen_helper_vfp_addd, a->vd, a->vn, a->vm, false);
}
static bool trans_VSUB_sp(DisasContext *s, arg_VSUB_sp *a)
{
return do_vfp_3op_sp(s, gen_helper_vfp_subs, a->vd, a->vn, a->vm, false);
}
static bool trans_VSUB_dp(DisasContext *s, arg_VSUB_sp *a)
{
return do_vfp_3op_dp(s, gen_helper_vfp_subd, a->vd, a->vn, a->vm, false);
}

6
target/arm/translate.c
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@ -1386,7 +1386,6 @@ static inline void gen_vfp_##name(int dp) \
tcg_temp_free_ptr(fpst); \
}
VFP_OP2(sub)
VFP_OP2(div)
#undef VFP_OP2
@ -3110,7 +3109,7 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
rn = VFP_SREG_N(insn);
switch (op) {
case 0 ... 6:
case 0 ... 7:
/* Already handled by decodetree */
return 1;
default:
@ -3296,9 +3295,6 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
for (;;) {
/* Perform the calculation. */
switch (op) {
case 7: /* sub: fn - fm */
gen_vfp_sub(dp);
break;
case 8: /* div: fn / fm */
gen_vfp_div(dp);
break;

5
target/arm/vfp.decode
View File

@ -132,3 +132,8 @@ VADD_sp ---- 1110 0.11 .... .... 1010 .0.0 .... \
vm=%vm_sp vn=%vn_sp vd=%vd_sp
VADD_dp ---- 1110 0.11 .... .... 1011 .0.0 .... \
vm=%vm_dp vn=%vn_dp vd=%vd_dp
VSUB_sp ---- 1110 0.11 .... .... 1010 .1.0 .... \
vm=%vm_sp vn=%vn_sp vd=%vd_sp
VSUB_dp ---- 1110 0.11 .... .... 1011 .1.0 .... \
vm=%vm_dp vn=%vn_dp vd=%vd_dp