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[Qemu-devel] [PULL 07/11] target-sh4: optimize subc using sub2
From: |
Aurelien Jarno |
Subject: |
[Qemu-devel] [PULL 07/11] target-sh4: optimize subc using sub2 |
Date: |
Fri, 12 Jun 2015 12:40:34 +0200 |
Reviewed-by: Richard Henderson <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>
---
target-sh4/translate.c | 18 +++++++-----------
1 file changed, 7 insertions(+), 11 deletions(-)
diff --git a/target-sh4/translate.c b/target-sh4/translate.c
index 5c90fe3..b8abfd5 100644
--- a/target-sh4/translate.c
+++ b/target-sh4/translate.c
@@ -880,19 +880,15 @@ static void _decode_opc(DisasContext * ctx)
return;
case 0x300a: /* subc Rm,Rn */
{
- TCGv t0, t1, t2;
- t0 = tcg_temp_new();
+ TCGv t0, t1;
+ t0 = tcg_const_tl(0);
t1 = tcg_temp_new();
- tcg_gen_sub_i32(t1, REG(B11_8), REG(B7_4));
- tcg_gen_sub_i32(t0, t1, cpu_sr_t);
- t2 = tcg_temp_new();
- tcg_gen_setcond_i32(TCG_COND_LTU, t2, REG(B11_8), t1);
- tcg_gen_setcond_i32(TCG_COND_LTU, t1, t1, t0);
- tcg_gen_or_i32(cpu_sr_t, t1, t2);
- tcg_temp_free(t2);
- tcg_temp_free(t1);
- tcg_gen_mov_i32(REG(B11_8), t0);
+ tcg_gen_add2_i32(t1, cpu_sr_t, cpu_sr_t, t0, REG(B7_4), t0);
+ tcg_gen_sub2_i32(REG(B11_8), cpu_sr_t,
+ REG(B11_8), t0, t1, cpu_sr_t);
+ tcg_gen_andi_i32(cpu_sr_t, cpu_sr_t, 1);
tcg_temp_free(t0);
+ tcg_temp_free(t1);
}
return;
case 0x300b: /* subv Rm,Rn */
--
2.1.4
- [Qemu-devel] [PULL 00/11] sh4-next queue, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PULL 07/11] target-sh4: optimize subc using sub2,
Aurelien Jarno <=
- [Qemu-devel] [PULL 03/11] sh4/r2d: convert to new MMIO accessor style, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PULL 02/11] linux-user: Add HWCAP for SH4, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PULL 06/11] target-sh4: optimize addc using add2, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PULL 08/11] target-sh4: optimize negc using add2 and sub2, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PULL 01/11] linux-user: Default sh4 to sh7785, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PULL 11/11] target-sh4: remove dead code, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PULL 10/11] target-sh4: factorize fmov implementation, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PULL 09/11] target-sh4: split out Q and M from of SR and optimize div1, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PULL 04/11] target-sh4: use bit number for SR constants, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PULL 05/11] target-sh4: Split out T from SR, Aurelien Jarno, 2015/06/12