[Qemu-devel] [PATCH] tcg: optimize gen_extr_i64_i32()

[Philippe Mathieu-Daudé]

Inspired by Richard Henderson comment:

    http://lists.nongnu.org/archive/html/qemu-devel/2017-05/msg02277.html

Patch applied mechanically with this coccinelle semantic patch:

    @@
    expression lo, hi,arg;
    @@
    -tcg_gen_extrl_i64_i32(lo, arg);
    -tcg_gen_extrh_i64_i32(hi, arg);
    +tcg_gen_extr_i64_i32(lo, hi, arg);

Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org>
---
 tcg/tcg-op.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c
index 6b1f41500c..f3d556c21a 100644
--- a/tcg/tcg-op.c
+++ b/tcg/tcg-op.c
@@ -2562,8 +2562,7 @@ void tcg_gen_extr_i64_i32(TCGv_i32 lo, TCGv_i32 hi, 
TCGv_i64 arg)
         tcg_gen_mov_i32(lo, TCGV_LOW(arg));
         tcg_gen_mov_i32(hi, TCGV_HIGH(arg));
     } else {
-        tcg_gen_extrl_i64_i32(lo, arg);
-        tcg_gen_extrh_i64_i32(hi, arg);
+        tcg_gen_extr_i64_i32(lo, hi, arg);
     }
 }
 
-- 
2.11.0