audiodsp/x86: clear the high bits of the order parameter on 64bit

Message ID 20160919172416.642F75DAB6@aruru.libav.org
State New
Headers show

Commit Message

Janne Grunau Sept. 19, 2016, 5:24 p.m.
Module: libav
Branch: master
Commit: 75d98e30afab61542faab3c0f11880834653bd6b

Author:    Anton Khirnov <anton@khirnov.net>
Committer: Anton Khirnov <anton@khirnov.net>
Date:      Tue Aug  9 14:17:15 2016 +0200

audiodsp/x86: clear the high bits of the order parameter on 64bit

Also change shl to add, since it can be faster on some CPUs.

CC: libav-stable@libav.org

---

 libavcodec/x86/audiodsp.asm |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/libavcodec/x86/audiodsp.asm b/libavcodec/x86/audiodsp.asm
index dc38ada..d7e63eb 100644
--- a/libavcodec/x86/audiodsp.asm
+++ b/libavcodec/x86/audiodsp.asm
@@ -26,7 +26,7 @@  SECTION .text
 %macro SCALARPRODUCT 0
 ; int ff_scalarproduct_int16(int16_t *v1, int16_t *v2, int order)
 cglobal scalarproduct_int16, 3,3,3, v1, v2, order
-    shl orderq, 1
+    add orderd, orderd
     add v1q, orderq
     add v2q, orderq
     neg orderq