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authorRichard Henderson <richard.henderson@linaro.org>2019-08-08 13:26:14 -0700
committerPeter Maydell <peter.maydell@linaro.org>2019-08-16 14:02:53 +0100
commitadefba76e8bf10dfb342094d2f5debfeedb1a74d (patch)
tree4c53f92773407a97a229609ff72d268b466c3064
parentdd861b3f29be97a9e3cdb9769dcbc0c7d7825185 (diff)
downloadqemu-arm-adefba76e8bf10dfb342094d2f5debfeedb1a74d.tar.gz
target/arm: Use tcg_gen_rotri_i32 for gen_swap_half
Rotate is the more compact and obvious way to swap 16-bit elements of a 32-bit word. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20190808202616.13782-6-richard.henderson@linaro.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
-rw-r--r--target/arm/translate.c6
1 files changed, 1 insertions, 5 deletions
diff --git a/target/arm/translate.c b/target/arm/translate.c
index 02ce8d44fa..2e16064620 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -444,11 +444,7 @@ static TCGv_i64 gen_muls_i64_i32(TCGv_i32 a, TCGv_i32 b)
/* Swap low and high halfwords. */
static void gen_swap_half(TCGv_i32 var)
{
- TCGv_i32 tmp = tcg_temp_new_i32();
- tcg_gen_shri_i32(tmp, var, 16);
- tcg_gen_shli_i32(var, var, 16);
- tcg_gen_or_i32(var, var, tmp);
- tcg_temp_free_i32(tmp);
+ tcg_gen_rotri_i32(var, var, 16);
}
/* Dual 16-bit add. Result placed in t0 and t1 is marked as dead.