Unattenuate multiply alpha by 1.
BUG=190
TESTED=planar_test
Review URL: https://webrtc-codereview.appspot.com/1114005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@578 16f28f9a-4ce2-e073-06de-1de4eb20be90
diff --git a/source/row_posix.cc b/source/row_posix.cc
index 13bb4f3..b786547 100644
--- a/source/row_posix.cc
+++ b/source/row_posix.cc
@@ -3763,8 +3763,8 @@
     "movd      0x0(%4,%3,4),%%xmm2             \n"
     "movzb     0x7(%0),%3                      \n"
     "movd      0x0(%4,%3,4),%%xmm3             \n"
-    "pshuflw   $0xc0,%%xmm2,%%xmm2             \n"
-    "pshuflw   $0xc0,%%xmm3,%%xmm3             \n"
+    "pshuflw   $0x40,%%xmm2,%%xmm2             \n"
+    "pshuflw   $0x40,%%xmm3,%%xmm3             \n"
     "movlhps   %%xmm3,%%xmm2                   \n"
     "pmulhuw   %%xmm2,%%xmm0                   \n"
     "movdqa    (%0),%%xmm1                     \n"
@@ -3773,14 +3773,11 @@
     "movd      0x0(%4,%3,4),%%xmm2             \n"
     "movzb     0xf(%0),%3                      \n"
     "movd      0x0(%4,%3,4),%%xmm3             \n"
-    "pshuflw   $0xc0,%%xmm2,%%xmm2             \n"
-    "pshuflw   $0xc0,%%xmm3,%%xmm3             \n"
+    "pshuflw   $0x40,%%xmm2,%%xmm2             \n"
+    "pshuflw   $0x40,%%xmm3,%%xmm3             \n"
     "movlhps   %%xmm3,%%xmm2                   \n"
     "pmulhuw   %%xmm2,%%xmm1                   \n"
-    "movdqa    (%0),%%xmm2                     \n"
-    "pand      %%xmm4,%%xmm2                   \n"
     "packuswb  %%xmm1,%%xmm0                   \n"
-    "por       %%xmm2,%%xmm0                   \n"
     "sub       $0x4,%2                         \n"
     "movdqa    %%xmm0,(%0,%1,1)                \n"
     "lea       0x10(%0),%0                     \n"