libretro/pcsx2
1
0
Fork 0
mirror of https://github.com/libretro/pcsx2.git synced 2024-12-13 21:28:38 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Merge pull request #178 from Sonicadvance1:x86_64-cpudetect

Browse Source 
Support grabbing the MXCSR mask on x86_64.
This commit is contained in:
Pseudonym 2014-07-31 16:14:49 +01:00
commit e25ad9759a
1 changed files with 14 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
common/src/x86emitter/cpudetect.cpp
View File

@ -53,12 +53,22 @@ void x86capabilities::SIMD_EstablishMXCSRmask()
MXCSR_Mask.bitmask = 0xFFFF; // SSE2 features added
}
if( !CanEmitShit() ) return;
#ifdef _M_X86_64
#ifdef _MSC_VER
// Use the intrinsic that is provided with MSVC 2012
_fxsave(&targetFXSAVE);
#else
// GCC path is supported since GCC 4.6.x
__asm __volatile ("fxsave %0" : "+m" (targetFXSAVE));
#endif
#else
// Grab the MXCSR mask the x86_32 way.
//
// the fxsave buffer must be 16-byte aligned to avoid GPF. I just save it to an
// unused portion of recSSE, since it has plenty of room to spare.
if( !CanEmitShit() ) return;
HostSys::MemProtectStatic( recSSE, PageAccess_ReadWrite() );
xSetPtr( recSSE );
@ -68,6 +78,7 @@ void x86capabilities::SIMD_EstablishMXCSRmask()
HostSys::MemProtectStatic( recSSE, PageAccess_ExecOnly() );
CallAddress( recSSE );
#endif
u32 result = (u32&)targetFXSAVE[28]; // bytes 28->32 are the MXCSR_Mask.
if( result != 0 )