Khaganat-NeL/khanat-opennel-code
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Changed: Use same _mm_getcsr and __cpuid intrinsics everywhere

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kervala 2016-01-04 15:40:45 +01:00
parent 6dde138039
commit 8c3da3d5d7
1 changed files with 5 additions and 80 deletions
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75
code/nel/src/misc/system_info.cpp
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@ -955,19 +955,8 @@ static bool DetectSSE()
// check OS support for SSE
try
{
#ifdef NL_OS_WINDOWS
#ifdef NL_NO_ASM
unsigned int tmp = _mm_getcsr();
nlunreferenced(tmp);
#else
__asm
{
xorps xmm0, xmm0 // Streaming SIMD Extension
}
#endif // NL_NO_ASM
#elif NL_OS_UNIX
__asm__ __volatile__ ("xorps %xmm0, %xmm0;");
#endif // NL_OS_UNIX
}
catch(...)
{
@ -990,73 +979,9 @@ bool CSystemInfo::hasCPUID ()
{
#ifdef NL_CPU_INTEL
uint32 result = 0;
#ifdef NL_OS_WINDOWS
#ifdef NL_NO_ASM
sint32 CPUInfo[4] = {-1};
nlcpuid(CPUInfo, 0);
if (CPUInfo[3] != -1) result = 1;
#else
__asm
{
pushad
pushfd
// If ID bit of EFLAGS can change, then cpuid is available
pushfd
pop eax // Get EFLAG
mov ecx,eax
xor eax,0x200000 // Flip ID bit
push eax
popfd // Write EFLAGS
pushfd
pop eax // read back EFLAG
xor eax,ecx
je noCpuid // no flip -> no CPUID instr.
popfd // restore state
popad
mov result, 1
jmp CPUIDPresent
noCpuid:
popfd // restore state
popad
mov result, 0
CPUIDPresent:
}
#endif // NL_NO_ASM
#elif NL_OS_UNIX // NL_OS_WINDOWS
__asm__ __volatile__ (
/* Save Register */
"pushl %%ebp;"
"pushl %%ebx;"
"pushl %%edx;"
/* Check if this CPU supports cpuid */
"pushf;"
"pushf;"
"popl %%eax;"
"movl %%eax, %%ebx;"
"xorl $(1 << 21), %%eax;" // CPUID bit
"pushl %%eax;"
"popf;"
"pushf;"
"popl %%eax;"
"popf;" // Restore flags
"xorl %%ebx, %%eax;"
"jz NoCPUID;"
"movl $1, %0;"
"jmp CPUID;"
"NoCPUID:;"
"movl $0, %0;"
"CPUID:;"
"popl %%edx;"
"popl %%ebx;"
"popl %%ebp;"
:"=a"(result)
);
#endif // NL_OS_UNIX
return result == 1;
#else
return false;