yuzu/unicorn
1
0
Fork 0
mirror of https://github.com/yuzu-emu/unicorn.git synced 2025-01-09 01:15:40 +00:00
Code Issues Packages Projects Releases Wiki Activity

target/arm: Simplify op_smlaxxx for SMLAL*

Browse source 
Since all of the inputs and outputs are i32, dispense with
the intermediate promotion to i64 and use tcg_gen_add2_i32.

Backports commit ea96b374641bc429269096d88d4e91ee544273e9 from qemu
This commit is contained in:
Richard Henderson 2019-11-19 14:11:47 -05:00 committed by Lioncash
parent 543b598d45
commit 201be7b8b1
No known key found for this signature in database
GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 8 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
qemu/target/arm/translate.c
View file

@ -8398,8 +8398,7 @@ static bool op_smlaxxx(DisasContext *s, arg_rrrr *a,
int add_long, bool nt, bool mt)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
TCGv_i32 t0, t1;
TCGv_i64 t64;
TCGv_i32 t0, t1, tl, th;
if (s->thumb
? !arm_dc_feature(s, ARM_FEATURE_THUMB_DSP)
@ -8423,12 +8422,14 @@ static bool op_smlaxxx(DisasContext *s, arg_rrrr *a,
store_reg(s, a->rd, t0);
break;
case 2:
t64 = tcg_temp_new_i64(tcg_ctx);
tcg_gen_ext_i32_i64(tcg_ctx, t64, t0);
tl = load_reg(s, a->ra);
th = load_reg(s, a->rd);
t1 = tcg_const_i32(tcg_ctx, 0);
tcg_gen_add2_i32(tcg_ctx, tl, th, tl, th, t0, t1);
tcg_temp_free_i32(tcg_ctx, t0);
gen_addq(s, t64, a->ra, a->rd);
gen_storeq_reg(s, a->ra, a->rd, t64);
tcg_temp_free_i64(tcg_ctx, t64);
tcg_temp_free_i32(tcg_ctx, t1);
store_reg(s, a->ra, tl);
store_reg(s, a->rd, th);
break;
default:
g_assert_not_reached();