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 t
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 { |