48 lines
1.1 KiB
C++
48 lines
1.1 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose: linux dependant ASM code for CPU capability detection
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//
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// $Workfile: $
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// $NoKeywords: $
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//=============================================================================//
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#define cpuid(in,a,b,c,d) \
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asm("pushl %%ebx\n\t" "cpuid\n\t" "movl %%ebx,%%esi\n\t" "pop %%ebx": "=a" (a), "=S" (b), "=c" (c), "=d" (d) : "a" (in));
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bool CheckMMXTechnology(void)
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{
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unsigned long eax,ebx,edx,unused;
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cpuid(1,eax,ebx,unused,edx);
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return edx & 0x800000;
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}
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bool CheckSSETechnology(void)
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{
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unsigned long eax,ebx,edx,unused;
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cpuid(1,eax,ebx,unused,edx);
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return edx & 0x2000000L;
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}
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bool CheckSSE2Technology(void)
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{
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unsigned long eax,ebx,edx,unused;
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cpuid(1,eax,ebx,unused,edx);
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return edx & 0x04000000;
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}
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bool Check3DNowTechnology(void)
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{
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unsigned long eax, unused;
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cpuid(0x80000000,eax,unused,unused,unused);
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if ( eax > 0x80000000L )
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{
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cpuid(0x80000001,unused,unused,unused,eax);
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return ( eax & 1<<31 );
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}
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return false;
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}
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