[PATCH 22/28] target/arm: Improve REVSH

[Richard Henderson]

The new bswap flags can implement the semantics exactly.

Cc: Peter Maydell <peter.maydell@linaro.org> 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/translate.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/target/arm/translate.c b/target/arm/translate.c
index 6b88163e3a..46d95d75ae 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -341,9 +341,7 @@ void gen_rev16(TCGv_i32 dest, TCGv_i32 var)
 /* Byteswap low halfword and sign extend.  */
 static void gen_revsh(TCGv_i32 dest, TCGv_i32 var)
 {
-    tcg_gen_ext16u_i32(var, var);
-    tcg_gen_bswap16_i32(var, var, TCG_BSWAP_IZ | TCG_BSWAP_OZ);
-    tcg_gen_ext16s_i32(dest, var);
+    tcg_gen_bswap16_i32(var, var, TCG_BSWAP_OS);
 }
 
 /* Dual 16-bit add.  Result placed in t0 and t1 is marked as dead.
-- 
2.25.1