root/platform/unix/solariscpuid.cpp

DEFINITIONS

1. GetFeatureFlags
2. P4Available

/* ***** BEGIN LICENSE BLOCK *****
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 *
 * The contents of this file are subject to the Mozilla Public License Version
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 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is [Open Source Virtual Machine.].
 *
 * The Initial Developer of the Original Code is
 * Adobe System Incorporated.
 * Portions created by the Initial Developer are Copyright (C) 2004-2006
 * the Initial Developer. All Rights Reserved.
 *
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 *   Adobe AS3 Team
 *   leon.sha@sun.com
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#include <stdio.h>
#include <sys/types.h>
#include <sys/elf.h>
#include <sys/fcntl.h>
struct cpuid_get_hwcap {
    char *cgh_archname;
    uint_t cgh_hwcap;
};
#ifndef AV_SPARC_V8PLUS // For OpenSolaris, these were defined
#define AV_SPARC_V8PLUS         0x0008
#define AV_SPARC_VIS            0x0020
#define AV_SPARC_VIS2           0x0040
#endif

#ifndef AV_386_MMX // For OpenSolaris, these were defined
#define AV_386_MMX                      0x0040
#define AV_386_AMD_MMX          0x0080
#define AV_386_AMD_3DNow        0x0100
#define AV_386_AMD_3DNowx       0x0200
#define AV_386_SSE                      0x0800
#define AV_386_SSE2                     0x1000
#define AV_386_SSE3                     0x4000
#endif
extern "C" int open(const char *, int, ...);
extern "C" int ioctl(int, int, ...);
extern "C" int close(int);

static unsigned int GetFeatureFlags()
{
        static bool checked = false;
        static unsigned int flag = 0;
        if (checked) return flag;
                
        checked = true;
        static const char dev_cpu_self_cpuid[] = "/dev/cpu/self/cpuid";
#ifdef AVMPLUS_SPARC
        static const char isa[] = "sparc";
#else
        static const char isa[] = "i386";
#endif
        int d = -1;
        d = open(dev_cpu_self_cpuid, O_RDONLY);
        if (d == -1)
          return 0;

        struct cpuid_get_hwcap __cgh, *cgh = &__cgh;

        cgh->cgh_archname = (char *)isa;
        if (ioctl(d, (('c' << 24) | ('i' << 16) | ('d' << 8) | 0) /* CPUID_GET_HWCAP */,
                cgh) == 0)
          flag = cgh->cgh_hwcap;

        close(d);

        return flag;
}

bool P4Available()
{
#ifdef AVMPLUS_SPARC
        return false;
#else
        static int checked = 0;
        if ( !checked ) {
                unsigned int dwFeatures = GetFeatureFlags();
                if (dwFeatures & AV_386_SSE2) {
                        checked = 2;
                        return true;
                }
                checked = 1;
        }
        if ( checked == 2 ) {
                return true;
        }
        return false;
#endif
}