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Interpreter: support non-IEEE mode emulation

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v2: fix fxsave on visual studio, thx @ rodolfo for this patch
This commit is contained in:
Tillmann Karras
2013-10-24 13:52:22 +02:00
parent 710a0ff435
commit 466a7afde3
6 changed files with 53 additions and 19 deletions
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22
Source/Core/Common/Src/x64CPUDetect.cpp
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@ -162,6 +162,28 @@ void CPUInfo::Detect()
if ((cpu_id[2] >> 20) & 1) bSSE4_2 = true;
if ((cpu_id[2] >> 25) & 1) bAES = true;
if ((cpu_id[3] >> 24) & 1)
{
// We can use FXSAVE.
bFXSR = true;
GC_ALIGNED16(u8 fx_state[512]);
memset(fx_state, 0, sizeof(fx_state));
#ifdef _WIN32
#ifdef _M_IX86
_fxsave(fx_state);
#elif defined (_M_X64)
_fxsave64(fx_state);
#endif
#else
__asm__("fxsave %0" : "=m" (fx_state));
#endif
// lowest byte of MXCSR_MASK
if ((fx_state[0x1C] >> 6) & 1)
bDAZ = true;
}
// AVX support requires 3 separate checks:
// - Is the AVX bit set in CPUID?
// - Is the XSAVE bit set in CPUID?