yuzu/unicorn
1
0
Fork 0
mirror of https://github.com/yuzu-emu/unicorn.git synced 2025-02-25 22:57:03 +00:00
Code Issues Packages Projects Releases Wiki Activity

target/arm: Convert VSUB to decodetree

Browse source 
Convert the VSUB instruction to decodetree.

Backports commit 8fec9a119264b7936503abce3c106fad7e3ccb76 from qemu.
This commit is contained in:
Peter Maydell 2019-06-13 18:17:26 -04:00 committed by Lioncash
parent f56f0342ad
commit 76c74bc657
No known key found for this signature in database
GPG key ID: 4E3C3CC1031BA9C7
3 changed files with 17 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
qemu/target/arm/translate-vfp.inc.c
View file

@ -1480,3 +1480,13 @@ 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
qemu/target/arm/translate.c
View file

@ -1442,7 +1442,6 @@ static inline void gen_vfp_##name(DisasContext *s, int dp)
tcg_temp_free_ptr(tcg_ctx, fpst); \
}
VFP_OP2(sub)
VFP_OP2(div)
#undef VFP_OP2
@ -3212,7 +3211,7 @@ 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:
@ -3398,9 +3397,6 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
for (;;) {
/* Perform the calculation. */
switch (op) {
case 7: /* sub: fn - fm */
gen_vfp_sub(s, dp);
break;
case 8: /* div: fn / fm */
gen_vfp_div(s, dp);
break;

6
qemu/target/arm/vfp.decode
View file

@ -132,3 +132,9 @@ 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