[v2,25/29] target/sh4: Improve swap.b translation

Message ID 20210621231849.1871164-26-richard.henderson@linaro.org
State Superseded
Headers show
Series
  • tcg: bswap improvements
Related show

Commit Message

Richard Henderson June 21, 2021, 11:18 p.m.
Remove TCG_BSWAP_IZ and the preceding zero-extension.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

---
 target/sh4/translate.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

-- 
2.25.1

Patch

diff --git a/target/sh4/translate.c b/target/sh4/translate.c
index 147219759b..f45515952f 100644
--- a/target/sh4/translate.c
+++ b/target/sh4/translate.c
@@ -676,8 +676,7 @@  static void _decode_opc(DisasContext * ctx)
     case 0x6008:		/* swap.b Rm,Rn */
 	{
             TCGv low = tcg_temp_new();
-	    tcg_gen_ext16u_i32(low, REG(B7_4));
-	    tcg_gen_bswap16_i32(low, low, TCG_BSWAP_IZ | TCG_BSWAP_OZ);
+	    tcg_gen_bswap16_i32(low, REG(B7_4), 0);
             tcg_gen_deposit_i32(REG(B11_8), REG(B7_4), low, 0, 16);
 	    tcg_temp_free(low);
 	}