u_cpu_detect.h File Reference

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Data Structures
struct	cpu_detect_caps
Enumerations
enum	cpu_detect_type {   CPU_DETECT_TYPE_MIPS, CPU_DETECT_TYPE_ALPHA, CPU_DETECT_TYPE_SPARC, CPU_DETECT_TYPE_X86,   CPU_DETECT_TYPE_POWERPC, CPU_DETECT_TYPE_OTHER }
Functions
void	cpu_detect_initialize (void)
struct cpu_detect_caps *	cpu_detect_get_caps (void)
int	cpu_detect_get_tsc (void)
int	cpu_detect_get_mmx (void)
int	cpu_detect_get_mmx2 (void)
int	cpu_detect_get_sse (void)
int	cpu_detect_get_sse2 (void)
int	cpu_detect_get_sse3 (void)
int	cpu_detect_get_ssse3 (void)
int	cpu_detect_get_3dnow (void)
int	cpu_detect_get_3dnow2 (void)
int	cpu_detect_get_altivec (void)

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Enumeration Type Documentation

enum cpu_detect_type

Enumerator:

CPU_DETECT_TYPE_MIPS
CPU_DETECT_TYPE_ALPHA
CPU_DETECT_TYPE_SPARC
CPU_DETECT_TYPE_X86
CPU_DETECT_TYPE_POWERPC
CPU_DETECT_TYPE_OTHER

Definition at line 34 of file u_cpu_detect.h.

             {
        CPU_DETECT_TYPE_MIPS,
        CPU_DETECT_TYPE_ALPHA,
        CPU_DETECT_TYPE_SPARC,
        CPU_DETECT_TYPE_X86,
        CPU_DETECT_TYPE_POWERPC,
        CPU_DETECT_TYPE_OTHER
} cpu_detect_type;

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Function Documentation

int cpu_detect_get_3dnow

(

void

)

Definition at line 492 of file u_cpu_detect.c.

References __cpu_detect_caps, and cpu_detect_caps::has3DNow.

{
        return __cpu_detect_caps.has3DNow;
}

int cpu_detect_get_3dnow2

(

void

)

Definition at line 497 of file u_cpu_detect.c.

References __cpu_detect_caps, and cpu_detect_caps::has3DNowExt.

{
        return __cpu_detect_caps.has3DNowExt;
}

int cpu_detect_get_altivec

(

void

)

Definition at line 502 of file u_cpu_detect.c.

References __cpu_detect_caps, and cpu_detect_caps::hasAltiVec.

{
        return __cpu_detect_caps.hasAltiVec;
}

struct cpu_detect_caps* cpu_detect_get_caps

(

void

)

[read]

Definition at line 451 of file u_cpu_detect.c.

References __cpu_detect_caps.

{
        return &__cpu_detect_caps;
}

int cpu_detect_get_mmx

(

void

)

Definition at line 462 of file u_cpu_detect.c.

References __cpu_detect_caps, and cpu_detect_caps::hasMMX.

{
        return __cpu_detect_caps.hasMMX;
}

int cpu_detect_get_mmx2

(

void

)

Definition at line 467 of file u_cpu_detect.c.

References __cpu_detect_caps, and cpu_detect_caps::hasMMX2.

{
        return __cpu_detect_caps.hasMMX2;
}

int cpu_detect_get_sse

(

void

)

Definition at line 472 of file u_cpu_detect.c.

References __cpu_detect_caps, and cpu_detect_caps::hasSSE.

{
        return __cpu_detect_caps.hasSSE;
}

int cpu_detect_get_sse2

(

void

)

Definition at line 477 of file u_cpu_detect.c.

References __cpu_detect_caps, and cpu_detect_caps::hasSSE2.

{
        return __cpu_detect_caps.hasSSE2;
}

int cpu_detect_get_sse3

(

void

)

Definition at line 482 of file u_cpu_detect.c.

References __cpu_detect_caps, and cpu_detect_caps::hasSSE3.

{
        return __cpu_detect_caps.hasSSE3;
}

int cpu_detect_get_ssse3

(

void

)

Definition at line 487 of file u_cpu_detect.c.

References __cpu_detect_caps, and cpu_detect_caps::hasSSSE3.

{
        return __cpu_detect_caps.hasSSSE3;
}

int cpu_detect_get_tsc

(

void

)

Definition at line 457 of file u_cpu_detect.c.

References __cpu_detect_caps, and cpu_detect_caps::hasTSC.

{
        return __cpu_detect_caps.hasTSC;
}

void cpu_detect_initialize

(

void

)

Definition at line 332 of file u_cpu_detect.c.

References __cpu_detect_caps, __cpu_detect_initialized, cpu_detect_caps::cacheline, check_os_katmai_support(), CPU_DETECT_TYPE_ALPHA, CPU_DETECT_TYPE_MIPS, CPU_DETECT_TYPE_OTHER, CPU_DETECT_TYPE_POWERPC, CPU_DETECT_TYPE_SPARC, CPU_DETECT_TYPE_X86, cpuid(), cpu_detect_caps::has3DNow, cpu_detect_caps::has3DNowExt, has_cpuid(), cpu_detect_caps::hasMMX, cpu_detect_caps::hasMMX2, cpu_detect_caps::hasSSE, cpu_detect_caps::hasSSE2, cpu_detect_caps::hasSSE3, cpu_detect_caps::hasSSSE3, cpu_detect_caps::hasTSC, cpu_detect_caps::nrcpu, cpu_detect_caps::type, and cpu_detect_caps::x86cpuType.

{
        unsigned int regs[4];
        unsigned int regs2[4];

        int mib[2], ncpu;
        int len;

        memset(&__cpu_detect_caps, 0, sizeof (struct cpu_detect_caps));

        /* Check for arch type */
#if defined(ARCH_MIPS)
        __cpu_detect_caps.type = CPU_DETECT_TYPE_MIPS;
#elif defined(ARCH_ALPHA)
        __cpu_detect_caps.type = CPU_DETECT_TYPE_ALPHA;
#elif defined(ARCH_SPARC)
        __cpu_detect_caps.type = CPU_DETECT_TYPE_SPARC;
#elif defined(ARCH_X86)
        __cpu_detect_caps.type = CPU_DETECT_TYPE_X86;
#elif defined(ARCH_POWERPC)
        __cpu_detect_caps.type = CPU_DETECT_TYPE_POWERPC;
#else
        __cpu_detect_caps.type = CPU_DETECT_TYPE_OTHER;
#endif

        /* Count the number of CPUs in system */
#if !defined(OS_WIN32) && !defined(OS_UNKNOWN) && defined(_SC_NPROCESSORS_ONLN)
        __cpu_detect_caps.nrcpu = sysconf(_SC_NPROCESSORS_ONLN);
        if (__cpu_detect_caps.nrcpu == -1)
                __cpu_detect_caps.nrcpu = 1;

#elif defined(OS_NETBSD) || defined(OS_FREEBSD) || defined(OS_OPENBSD)

        mib[0] = CTL_HW;
        mib[1] = HW_NCPU;

        len = sizeof (ncpu);
        sysctl(mib, 2, &ncpu, &len, NULL, 0);
        __cpu_detect_caps.nrcpu = ncpu;

#else
        __cpu_detect_caps.nrcpu = 1;
#endif

#if defined(ARCH_X86)
        /* No cpuid, old 486 or lower */
        if (has_cpuid() == 0)
                return;

        __cpu_detect_caps.cacheline = 32;

        /* Get max cpuid level */
        cpuid(0x00000000, regs);

        if (regs[0] >= 0x00000001) {
                unsigned int cacheline;

                cpuid (0x00000001, regs2);

                __cpu_detect_caps.x86cpuType = (regs2[0] >> 8) & 0xf;
                if (__cpu_detect_caps.x86cpuType == 0xf)
                    __cpu_detect_caps.x86cpuType = 8 + ((regs2[0] >> 20) & 255); /* use extended family (P4, IA64) */

                /* general feature flags */
                __cpu_detect_caps.hasTSC  = (regs2[3] & (1 << 8  )) >>  8; /* 0x0000010 */
                __cpu_detect_caps.hasMMX  = (regs2[3] & (1 << 23 )) >> 23; /* 0x0800000 */
                __cpu_detect_caps.hasSSE  = (regs2[3] & (1 << 25 )) >> 25; /* 0x2000000 */
                __cpu_detect_caps.hasSSE2 = (regs2[3] & (1 << 26 )) >> 26; /* 0x4000000 */
                __cpu_detect_caps.hasSSE3 = (regs2[2] & (1));          /* 0x0000001 */
                __cpu_detect_caps.hasSSSE3 = (regs2[2] & (1 << 9 )) >> 9;   /* 0x0000020 */
                __cpu_detect_caps.hasMMX2 = __cpu_detect_caps.hasSSE; /* SSE cpus supports mmxext too */

                cacheline = ((regs2[1] >> 8) & 0xFF) * 8;
                if (cacheline > 0)
                        __cpu_detect_caps.cacheline = cacheline;
        }

        cpuid(0x80000000, regs);

        if (regs[0] >= 0x80000001) {

                cpuid(0x80000001, regs2);

                __cpu_detect_caps.hasMMX  |= (regs2[3] & (1 << 23 )) >> 23; /* 0x0800000 */
                __cpu_detect_caps.hasMMX2 |= (regs2[3] & (1 << 22 )) >> 22; /* 0x400000 */
                __cpu_detect_caps.has3DNow    = (regs2[3] & (1 << 31 )) >> 31; /* 0x80000000 */
                __cpu_detect_caps.has3DNowExt = (regs2[3] & (1 << 30 )) >> 30;
        }

        if (regs[0] >= 0x80000006) {
                cpuid(0x80000006, regs2);
                __cpu_detect_caps.cacheline = regs2[2] & 0xFF;
        }


#if defined(OS_LINUX) || defined(OS_FREEBSD) || defined(OS_NETBSD) || defined(OS_CYGWIN) || defined(OS_OPENBSD)
        if (__cpu_detect_caps.hasSSE)
                check_os_katmai_support();

        if (!__cpu_detect_caps.hasSSE) {
                __cpu_detect_caps.hasSSE2 = 0;
                __cpu_detect_caps.hasSSE3 = 0;
                __cpu_detect_caps.hasSSSE3 = 0;
        }
#else
        __cpu_detect_caps.hasSSE = 0;
        __cpu_detect_caps.hasSSE2 = 0;
        __cpu_detect_caps.hasSSE3 = 0;
        __cpu_detect_caps.hasSSSE3 = 0;
#endif
#endif /* ARCH_X86 */

#if defined(ARCH_POWERPC)
        check_os_altivec_support();
#endif /* ARCH_POWERPC */

        __cpu_detect_initialized = 1;
}

---