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[v2,03/23] target/alpha: Use tcg_gen_movcond_i64 in gen_fold_mzero

Message ID 20230818221327.150194-4-richard.henderson@linaro.org
State Superseded
Headers show
Series tcg: Introduce negsetcond opcodes | expand

Commit Message

Richard Henderson Aug. 18, 2023, 10:13 p.m. UTC 
The setcond + neg + and sequence is a complex method of
performing a conditional move.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/alpha/translate.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
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Patch

diff --git a/target/alpha/translate.c b/target/alpha/translate.c
index 846f3d8091..0839182a1f 100644
--- a/target/alpha/translate.c
+++ b/target/alpha/translate.c
@@ -517,10 +517,9 @@  static void gen_fold_mzero(TCGCond cond, TCGv dest, TCGv src)
 
     case TCG_COND_GE:
     case TCG_COND_LT:
-        /* For >= or <, map -0.0 to +0.0 via comparison and mask.  */
-        tcg_gen_setcondi_i64(TCG_COND_NE, dest, src, mzero);
-        tcg_gen_neg_i64(dest, dest);
-        tcg_gen_and_i64(dest, dest, src);
+        /* For >= or <, map -0.0 to +0.0. */
+        tcg_gen_movcond_i64(TCG_COND_NE, dest, src, tcg_constant_i64(mzero),
+                            src, tcg_constant_i64(0));
         break;
 
     default: