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