| /* APPLE LOCAL file 5612787 sse4 */ |
| /* 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) |
| #define bit_SSSE3 (1 << 9) |
| #define bit_SSE4_1 (1 << 19) |
| #define bit_SSE4_2 (1 << 20) |
| #define bit_POPCNT (1 << 23) |
| |
| /* %edx */ |
| #define bit_CMOV (1 << 15) |
| #define bit_MMX (1 << 23) |
| #define bit_SSE (1 << 25) |
| #define bit_SSE2 (1 << 26) |
| |
| /* Extended Features */ |
| /* %ecx */ |
| #define bit_SSE4a (1 << 6) |
| |
| #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; |
| } |
| |
| static inline unsigned int |
| i386_get_extended_cpuid (unsigned int *ecx, unsigned int *edx) |
| { |
| int fl1; |
| if (!(i386_get_cpuid (ecx, edx))) |
| return 0; |
| |
| /* Invoke CPUID(0x80000000) to get the highest supported extended function |
| number */ |
| #ifdef __x86_64__ |
| __asm__ ("cpuid" |
| : "=a" (fl1) : "0" (0x80000000) : "edx", "ecx", "ebx"); |
| #else |
| __asm__ ("pushl %%ebx; cpuid; popl %%ebx" |
| : "=a" (fl1) : "0" (0x80000000) : "edx", "ecx"); |
| #endif |
| /* Check if highest supported extended function used below are supported */ |
| if (fl1 < 0x80000001) |
| return 0; |
| |
| /* Invoke CPUID(0x80000001), return %ecx and %edx; caller can examine bits to |
| determine what's supported. */ |
| #ifdef __x86_64__ |
| __asm__ ("cpuid" |
| : "=c" (*ecx), "=d" (*edx), "=a" (fl1) : "2" (0x80000001) : "ebx"); |
| #else |
| __asm__ ("pushl %%ebx; cpuid; popl %%ebx" |
| : "=c" (*ecx), "=d" (*edx), "=a" (fl1) : "2" (0x80000001)); |
| #endif |
| return 1; |
| } |
| |
| |
| unsigned int i386_cpuid_ecx (void) NOINLINE; |
| unsigned int i386_cpuid_edx (void) NOINLINE; |
| unsigned int i386_extended_cpuid_ecx (void) NOINLINE; |
| unsigned int i386_extended_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; |
| } |
| |
| unsigned int NOINLINE |
| i386_extended_cpuid_ecx (void) |
| { |
| unsigned int ecx, edx; |
| if (i386_get_extended_cpuid (&ecx, &edx)) |
| return ecx; |
| else |
| return 0; |
| } |
| |
| unsigned int NOINLINE |
| i386_extended_cpuid_edx (void) |
| { |
| unsigned int ecx, edx; |
| if (i386_get_extended_cpuid (&ecx, &edx)) |
| return edx; |
| else |
| return 0; |
| } |
| |
| static inline unsigned int |
| i386_cpuid (void) |
| { |
| return i386_cpuid_edx (); |
| } |