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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [testsuite/] [gcc.dg/] [i386-cpuid.h] - Rev 154
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/* Helper file for i386 platform. Runtime check for MMX/SSE/SSE2 support. Used by 20020523-2.c and i386-sse-6.c, and possibly others. */ /* Plagarized from 20020523-2.c. */ /* %ecx */ #define bit_SSE3 (1 << 0) /* %edx */ #define bit_CMOV (1 << 15) #define bit_MMX (1 << 23) #define bit_SSE (1 << 25) #define bit_SSE2 (1 << 26) #ifndef NOINLINE #define NOINLINE __attribute__ ((noinline)) #endif static inline unsigned int i386_get_cpuid (unsigned int *ecx, unsigned int *edx) { int fl1; #ifndef __x86_64__ int fl2; /* See if we can use cpuid. On AMD64 we always can. */ __asm__ ("pushfl; pushfl; popl %0; movl %0,%1; xorl %2,%0;" "pushl %0; popfl; pushfl; popl %0; popfl" : "=&r" (fl1), "=&r" (fl2) : "i" (0x00200000)); if (((fl1 ^ fl2) & 0x00200000) == 0) return (0); #endif /* Host supports cpuid. See if cpuid gives capabilities, try CPUID(0). Preserve %ebx and %ecx; cpuid insn clobbers these, we don't need their CPUID values here, and %ebx may be the PIC register. */ #ifdef __x86_64__ __asm__ ("pushq %%rcx; pushq %%rbx; cpuid; popq %%rbx; popq %%rcx" : "=a" (fl1) : "0" (0) : "rdx", "cc"); #else __asm__ ("pushl %%ecx; pushl %%ebx; cpuid; popl %%ebx; popl %%ecx" : "=a" (fl1) : "0" (0) : "edx", "cc"); #endif if (fl1 == 0) return (0); /* Invoke CPUID(1), return %ecx and %edx; caller can examine bits to determine what's supported. */ #ifdef __x86_64__ __asm__ ("pushq %%rbx; cpuid; popq %%rbx" : "=c" (*ecx), "=d" (*edx), "=a" (fl1) : "2" (1) : "cc"); #else __asm__ ("pushl %%ebx; cpuid; popl %%ebx" : "=c" (*ecx), "=d" (*edx), "=a" (fl1) : "2" (1) : "cc"); #endif return 1; } unsigned int i386_cpuid_ecx (void) NOINLINE; unsigned int i386_cpuid_edx (void) NOINLINE; unsigned int NOINLINE i386_cpuid_ecx (void) { unsigned int ecx, edx; if (i386_get_cpuid (&ecx, &edx)) return ecx; else return 0; } unsigned int NOINLINE i386_cpuid_edx (void) { unsigned int ecx, edx; if (i386_get_cpuid (&ecx, &edx)) return edx; else return 0; } static inline unsigned int i386_cpuid (void) { return i386_cpuid_edx (); }
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