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57 lines
1.3 KiB
57 lines
1.3 KiB
//========= 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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#if defined (__arm__) |
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bool CheckMMXTechnology(void) { return false; } |
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bool CheckSSETechnology(void) { return false; } |
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bool CheckSSE2Technology(void) { return false; } |
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bool Check3DNowTechnology(void) { return false; } |
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#else |
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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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#endif
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