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| author | Aurelien Jarno <aurelien@aurel32.net> | 2015-05-25 01:28:56 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2015-06-12 12:02:48 +0200 |
| commit | d0f44a55fa321e042bd6b2a0fa25ac48864b7a25 (patch) | |
| tree | 92fa37119083a4792f1e96a54886fa1364164ca2 /target-sh4 | |
| parent | a2368e01c95a093d250a0e5d3cef53dddf642f1e (diff) | |
| download | qemu-d0f44a55fa321e042bd6b2a0fa25ac48864b7a25.zip qemu-d0f44a55fa321e042bd6b2a0fa25ac48864b7a25.tar.gz qemu-d0f44a55fa321e042bd6b2a0fa25ac48864b7a25.tar.bz2 | |
target-sh4: optimize subc using sub2
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'target-sh4')
| -rw-r--r-- | target-sh4/translate.c | 18 |
1 files 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 */ |