From: Fiona Glaser <fiona@x264.com>
Date: Fri, 3 Jul 2009 09:33:44 +0000 (-0700)
Subject: Slightly faster dequant_flat assembly
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=1be01cb3fb9efec44be81714ae25bc272fe6c6cf;p=libx264

Slightly faster dequant_flat assembly
Eliminate some redundant shifts.
---

diff --git a/common/x86/quant-a.asm b/common/x86/quant-a.asm
index 0cb45cb2..a9e4ad3a 100644
--- a/common/x86/quant-a.asm
+++ b/common/x86/quant-a.asm
@@ -305,6 +305,7 @@ QUANT_AC x264_quant_8x8_sse4, 8
 
 %macro DEQUANT16_FLAT 2-5
     mova   m0, %1
+    psllw  m0, m4
 %assign i %0-2
 %rep %0-1
 %if i
@@ -313,7 +314,6 @@ QUANT_AC x264_quant_8x8_sse4, 8
 %else
     pmullw m0, [r0+%2]
 %endif
-    psllw  m %+ i, m4
     mova   [r0+%2], m %+ i
     %assign i i-1
     %rotate 1