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

media/base/yuv_convert.cc

Index: media/base/yuv_convert.cc
diff --git a/media/base/yuv_convert.cc b/media/base/yuv_convert.cc
index 7aa16cc063a630833378c557bf0b05bdf8130b97..e64ea48c458be2a6dd3d5e3cdddee9c1d70dd5dd 100644
--- a/media/base/yuv_convert.cc
+++ b/media/base/yuv_convert.cc
@@ -33,6 +33,11 @@
 #endif
 #endif
 
+// Assembly functions are declared without namespace.
+extern "C" {
+void EmptyRegisterState_MMX(void);

[scherkus (not reviewing), 2013/02/01 01:13:17]

nit: we don't typically put the void type in for parameters (if this is somehow
necessary for assembly magic, feel free to ignore)

[wolenetz, 2013/02/01 02:42:07]

Done.

+}  // extern "C"
+
 namespace media {
 
 static FilterYUVRowsProc ChooseFilterYUVRowsProc() {
@@ -40,9 +45,12 @@ static FilterYUVRowsProc ChooseFilterYUVRowsProc() {
   base::CPU cpu;
   if (cpu.has_sse2())
     return &FilterYUVRows_SSE2;
+
+#if !defined(MEDIA_DO_NOT_USE_MMX_INTRINSICS)
   if (cpu.has_mmx())
     return &FilterYUVRows_MMX;
-#endif
+#endif  // !defined(MEDIA_DO_NOT_USE_MMX_INTRINSICS)
+#endif  // defined(ARCH_CPU_X86_FAMILY)
   return &FilterYUVRows_C;
 }
 
@@ -97,9 +105,16 @@ void EmptyRegisterState() {
     has_mmx = cpu.has_mmx();
     checked = true;
   }
-  if (has_mmx)
+
+  if (has_mmx) {
+#if defined(MEDIA_DO_NOT_USE_MMX_INTRINSICS)
+    EmptyRegisterState_MMX();
+#else
     _mm_empty();
-#endif
+#endif  // defined(MEDIA_DO_NOT_USE_MMX_INTRINSICS)
+  }
+
+#endif  // defined(ARCH_CPU_X86_FAMILY)
 }
 
 // 16.16 fixed point arithmetic