This reverts commit 60a3cb9ad8.
Reason for revert: x87 instruction usage might not be as
clear cut as I would like. At the very least, llvm mingw
builds appear to having issues with emms.
Original change's description:
> remove fldcw/fstcw from Win64 builds
>
> _MCW_PC (Precision control) is not supported on x64:
> https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/control87-controlfp-control87-2
>
> The x87 FPU is not used on Win64 or ARM so setting the x87 control word
> is not necessary. The SSE/SSE2 and ARM FPUs don't have a precision
> control - the precision is embedded in each instruction - so the need to
> set the control word is also gone.
BUG=webm:1500
Change-Id: I25bcfa96bc9c860f6c7e03315d75fa6fd1d88ec5
_MCW_PC (Precision control) is not supported on x64:
https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/control87-controlfp-control87-2
The x87 FPU is not used on Win64 or ARM so setting the x87 control word
is not necessary. The SSE/SSE2 and ARM FPUs don't have a precision
control - the precision is embedded in each instruction - so the need to
set the control word is also gone.
BUG=webm:1500
Change-Id: I014513282a7dc320d1cdeaec48249d98a66bf09f
Only target 32bit builds. Visual Studio does not define _mm_empty for
64bit configurations.
Rename emms.asm and remove from 32 bit builds to avoid empty file
warnings.
Don't check register state on 64bit builds.
BUG=webm:1500
This reverts commit 60beb781c1.
Change-Id: I5ac4cf6c67249ff24f7da19792144de20527bfce
