Viewing file:  isa-check.h (1.31 KB) -rw-r--r--
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#include "cpuid.h"
extern void exit (int) __attribute__((noreturn));
/* Determine what instruction set we've been compiled for,
and detect that we're running with it. */
static void __attribute__((constructor))
check_isa (void)
{
int a, b, c, d;
int c1, d1, c1e, d1e;
c1 = d1 = c1e = d1e = 0;
#ifdef __MMX__
d1 |= bit_MMX;
#endif
#ifdef __3dNOW__
d1e |= bit_3DNOW;
#endif
#ifdef __3dNOW_A__
d1e |= bit_3DNOWP;
#endif
#ifdef __SSE__
d1 |= bit_SSE;
#endif
#ifdef __SSE2__
d1 |= bit_SSE2;
#endif
#ifdef __SSE3__
c1 |= bit_SSE3;
#endif
#ifdef __SSSE3__
c1 |= bit_SSSE3;
#endif
#ifdef __SSE4_1__
c1 |= bit_SSE4_1;
#endif
#ifdef __SSE4_2__
c1 |= bit_SSE4_2;
#endif
#ifdef __AES__
c1 |= bit_AES;
#endif
#ifdef __PCLMUL__
c1 |= bit_PCLMUL;
#endif
#ifdef __AVX__
c1 |= bit_AVX;
#endif
#ifdef __FMA__
c1 |= bit_FMA;
#endif
#ifdef __SSE4A__
c1e |= bit_SSE4a;
#endif
#ifdef __FMA4__
c1e |= bit_FMA4;
#endif
#ifdef __XOP__
c1e |= bit_XOP;
#endif
#ifdef __LWP__
c1e |= bit_LWP;
#endif
if (c1 | d1)
{
if (!__get_cpuid (1, &a, &b, &c, &d))
goto fail;
if ((c & c1) != c1 || (d & d1) != d1)
goto fail;
}
if (c1e | d1e)
{
if (!__get_cpuid (0x80000001, &a, &b, &c, &d))
goto fail;
if ((c & c1e) != c1e || (d & d1e) != d1e)
goto fail;
}
return;
fail:
exit (0);
}
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