Replace or exclude MMX intrinsics in yuv_convert_simd_x86 due to lack of VS2010 support for them in…

media/base/yuv_convert.h

Index: media/base/yuv_convert.h
diff --git a/media/base/yuv_convert.h b/media/base/yuv_convert.h
index afd47d79ca1ea836a4a9852b8fb1cd224287344e..42d45265489cc0564d04c827a0591239ac6ad7a9 100644
--- a/media/base/yuv_convert.h
+++ b/media/base/yuv_convert.h
@@ -9,6 +9,16 @@
 
 namespace media {
 
+// Visual Studio 2010 does not support MMX intrinsics on x64.
+// Some win64 yuv_convert code paths use SSE+MMX yasm, so without rewriting
+// them, we use yasm EmptyRegisterState_MMX in place of _mm_empty() or
+// hide the versions implemented with heavy use of MMX intrinsics.
+// TODO(wolenetz): (crbug.com/173450) Use MMX intrinsics when compiling win64

[scherkus (not reviewing), 2013/01/31 23:55:27]

nit: we typically format our todos w/ the bug at the end

TODO(wolenetz): Use MMX .... http://crbug.com/173450

[wolenetz, 2013/02/01 00:57:26]

Done.

+// with Visual Studio 2012?
+#if defined(ARCH_CPU_X86_64) && defined(COMPILER_MSVC)
+#define MEDIA_DO_NOT_USE_MMX_INTRINSICS
+#endif
+
 // Type of YUV surface.
 // The value of these enums matter as they are used to shift vertical indices.
 enum YUVType {