Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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5 years ago
//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: linux dependant ASM code for CPU capability detection
//
// $Workfile: $
// $NoKeywords: $
//=============================================================================//
#include "platform.h"
#if defined __SANITIZE_ADDRESS__
bool CheckMMXTechnology(void) { return false; }
bool CheckSSETechnology(void) { return false; }
bool CheckSSE2Technology(void) { return false; }
bool Check3DNowTechnology(void) { return false; }
#elif defined (__arm__) || defined (__aarch64__)
bool CheckMMXTechnology(void) { return false; }
bool CheckSSETechnology(void) { return false; }
bool CheckSSE2Technology(void) { return false; }
bool Check3DNowTechnology(void) { return false; }
#else
static void cpuid(uint32 function, uint32& out_eax, uint32& out_ebx, uint32& out_ecx, uint32& out_edx)
{
#if defined(PLATFORM_64BITS)
asm("mov %%rbx, %%rsi\n\t"
"cpuid\n\t"
"xchg %%rsi, %%rbx"
: "=a" (out_eax),
"=S" (out_ebx),
"=c" (out_ecx),
"=d" (out_edx)
: "a" (function)
);
#else
asm("mov %%ebx, %%esi\n\t"
"cpuid\n\t"
"xchg %%esi, %%ebx"
: "=a" (out_eax),
"=S" (out_ebx),
"=c" (out_ecx),
"=d" (out_edx)
: "a" (function)
);
#endif
}
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bool CheckMMXTechnology(void)
{
uint32 eax,ebx,edx,unused;
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cpuid(1,eax,ebx,unused,edx);
return edx & 0x800000;
}
bool CheckSSETechnology(void)
{
uint32 eax,ebx,edx,unused;
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cpuid(1,eax,ebx,unused,edx);
return edx & 0x2000000L;
}
bool CheckSSE2Technology(void)
{
uint32 eax,ebx,edx,unused;
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cpuid(1,eax,ebx,unused,edx);
return edx & 0x04000000;
}
bool Check3DNowTechnology(void)
{
uint32 eax, unused;
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cpuid(0x80000000,eax,unused,unused,unused);
if ( eax > 0x80000000L )
{
cpuid(0x80000001,unused,unused,unused,eax);
return ( eax & 1<<31 );
}
return false;
}
#endif