From: Aurelien Jarno <aurelien@aurel32.net>
Date: Sun, 24 May 2015 23:28:56 +0000 (+0200)
Subject: target-sh4: optimize addc using add2
X-Git-Tag: v2.4.0-rc0~78^2~5
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a2368e01c95a093d250a0e5d3cef53dddf642f1e;p=thirdparty%2Fqemu.git

target-sh4: optimize addc using add2

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---

diff --git a/target-sh4/translate.c b/target-sh4/translate.c
index bcdf4f39f91..5c90fe3f31c 100644
--- a/target-sh4/translate.c
+++ b/target-sh4/translate.c
@@ -644,15 +644,12 @@ static void _decode_opc(DisasContext * ctx)
     case 0x300e:		/* addc Rm,Rn */
         {
             TCGv t0, t1;
-            t0 = tcg_temp_new();
+            t0 = tcg_const_tl(0);
             t1 = tcg_temp_new();
-            tcg_gen_add_i32(t0, REG(B7_4), REG(B11_8));
-            tcg_gen_add_i32(t1, cpu_sr_t, t0);
-            tcg_gen_setcond_i32(TCG_COND_GTU, cpu_sr_t, REG(B11_8), t0);
-            tcg_gen_setcond_i32(TCG_COND_GTU, t0, t0, t1);
-            tcg_gen_or_i32(cpu_sr_t, cpu_sr_t, t0);
+            tcg_gen_add2_i32(t1, cpu_sr_t, cpu_sr_t, t0, REG(B7_4), t0);
+            tcg_gen_add2_i32(REG(B11_8), cpu_sr_t,
+                             REG(B11_8), t0, t1, cpu_sr_t);
             tcg_temp_free(t0);
-            tcg_gen_mov_i32(REG(B11_8), t1);
             tcg_temp_free(t1);
         }
 	return;