xmm4 is unused - remove from NV21

BUG=324
TESTED=untested
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/40489004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1243 16f28f9a-4ce2-e073-06de-1de4eb20be90

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 1243
+Version: 1244
 License: BSD
 License File: LICENSE
 

include/libyuv/version.h

@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_  // NOLINT
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 1243
+#define LIBYUV_VERSION 1244
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

source/row_posix.cc

@@ -1888,7 +1888,6 @@ void OMITFP NV21ToARGBRow_SSSE3(const uint8* y_buf,
                                 int width) {
   asm volatile (
     "pcmpeqb   %%xmm5,%%xmm5                   \n"
-    "pxor      %%xmm4,%%xmm4                   \n"
     LABELALIGN
   "1:                                          \n"
     READNV12
@@ -1911,7 +1910,7 @@ void OMITFP NV21ToARGBRow_SSSE3(const uint8* y_buf,
   : "memory", "cc"
   // Does not use r14.
 #if defined(__SSE2__)
-    , "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5"
+    , "xmm0", "xmm1", "xmm2", "xmm3", "xmm5"
 #endif
   );
 }