/*

   Simple DirectMedia Layer

   Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>

   This software is provided 'as-is', without any express or implied

   warranty.  In no event will the authors be held liable for any damages

   arising from the use of this software.

   Permission is granted to anyone to use this software for any purpose,

   including commercial applications, and to alter it and redistribute it

   freely, subject to the following restrictions:

   1. The origin of this software must not be misrepresented; you must not

      claim that you wrote the original software. If you use this software

      in a product, an acknowledgment in the product documentation would be

      appreciated but is not required.

   2. Altered source versions must be plainly marked as such, and must not be

      misrepresented as being the original software.

   3. This notice may not be removed or altered from any source distribution.

 */

 #ifdef TEST_MAIN

 #include "SDL_config.h"

 #else

 #include "../SDL_internal.h"

 #endif

 #if defined(__WIN32__)

 #include "../core/windows/SDL_windows.h"

 #endif

 /* CPU feature detection for SDL */

 #include "SDL_cpuinfo.h"

 #ifdef HAVE_SYSCONF

 #include <unistd.h>

 #endif

 #ifdef HAVE_SYSCTLBYNAME

 #include <sys/types.h>

 #include <sys/sysctl.h>

 #endif

 #if defined(__MACOSX__) && (defined(__ppc__) || defined(__ppc64__))

 #include <sys/sysctl.h>         /* For AltiVec check */

 #elif defined(__OpenBSD__) && defined(__powerpc__)

 #include <sys/param.h>

 #include <sys/sysctl.h> /* For AltiVec check */

 #include <machine/cpu.h>

 #elif SDL_ALTIVEC_BLITTERS && HAVE_SETJMP

 #include <signal.h>

 #include <setjmp.h>

 #endif

 #define CPU_HAS_RDTSC   0x00000001

 #define CPU_HAS_ALTIVEC 0x00000002

 #define CPU_HAS_MMX     0x00000004

 #define CPU_HAS_3DNOW   0x00000008

 #define CPU_HAS_SSE     0x00000010

 #define CPU_HAS_SSE2    0x00000020

 #define CPU_HAS_SSE3    0x00000040

 #define CPU_HAS_SSE41   0x00000100

 #define CPU_HAS_SSE42   0x00000200

 #define CPU_HAS_AVX     0x00000400

 #define CPU_HAS_AVX2    0x00000800

 #if SDL_ALTIVEC_BLITTERS && HAVE_SETJMP && !__MACOSX__ && !__OpenBSD__

 /* This is the brute force way of detecting instruction sets...

    the idea is borrowed from the libmpeg2 library - thanks!

  */

 static jmp_buf jmpbuf;

 static void

 illegal_instruction(int sig)

 {

     longjmp(jmpbuf, 1);

 }

 #endif /* HAVE_SETJMP */

 static int

 CPU_haveCPUID(void)

 {

     int has_CPUID = 0;

 /* *INDENT-OFF* */

 #ifndef SDL_CPUINFO_DISABLED

 #if defined(__GNUC__) && defined(i386)

     __asm__ (

 "        pushfl                      # Get original EFLAGS             \n"

 "        popl    %%eax                                                 \n"

 "        movl    %%eax,%%ecx                                           \n"

 "        xorl    $0x200000,%%eax     # Flip ID bit in EFLAGS           \n"

 "        pushl   %%eax               # Save new EFLAGS value on stack  \n"

 "        popfl                       # Replace current EFLAGS value    \n"

 "        pushfl                      # Get new EFLAGS                  \n"

 "        popl    %%eax               # Store new EFLAGS in EAX         \n"

 "        xorl    %%ecx,%%eax         # Can not toggle ID bit,          \n"

 "        jz      1f                  # Processor=80486                 \n"

 "        movl    $1,%0               # We have CPUID support           \n"

 "1:                                                                    \n"

     : "=m" (has_CPUID)

     :

     : "%eax", "%ecx"

     );

 #elif defined(__GNUC__) && defined(__x86_64__)

 /* Technically, if this is being compiled under __x86_64__ then it has 

    CPUid by definition.  But it's nice to be able to prove it.  :)      */

     __asm__ (

 "        pushfq                      # Get original EFLAGS             \n"

 "        popq    %%rax                                                 \n"

 "        movq    %%rax,%%rcx                                           \n"

 "        xorl    $0x200000,%%eax     # Flip ID bit in EFLAGS           \n"

 "        pushq   %%rax               # Save new EFLAGS value on stack  \n"

 "        popfq                       # Replace current EFLAGS value    \n"

 "        pushfq                      # Get new EFLAGS                  \n"

 "        popq    %%rax               # Store new EFLAGS in EAX         \n"

 "        xorl    %%ecx,%%eax         # Can not toggle ID bit,          \n"

 "        jz      1f                  # Processor=80486                 \n"

 "        movl    $1,%0               # We have CPUID support           \n"

 "1:                                                                    \n"

     : "=m" (has_CPUID)

     :

     : "%rax", "%rcx"

     );

 #elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)

     __asm {

         pushfd                      ; Get original EFLAGS

         pop     eax

         mov     ecx, eax

         xor     eax, 200000h        ; Flip ID bit in EFLAGS

         push    eax                 ; Save new EFLAGS value on stack

         popfd                       ; Replace current EFLAGS value

         pushfd                      ; Get new EFLAGS

         pop     eax                 ; Store new EFLAGS in EAX

         xor     eax, ecx            ; Can not toggle ID bit,

         jz      done                ; Processor=80486

         mov     has_CPUID,1         ; We have CPUID support

 done:

     }

 #elif defined(_MSC_VER) && defined(_M_X64)

     has_CPUID = 1;

 #elif defined(__sun) && defined(__i386)

     __asm (

 "       pushfl                 \n"

 "       popl    %eax           \n"

 "       movl    %eax,%ecx      \n"

 "       xorl    $0x200000,%eax \n"

 "       pushl   %eax           \n"

 "       popfl                  \n"

 "       pushfl                 \n"

 "       popl    %eax           \n"

 "       xorl    %ecx,%eax      \n"

 "       jz      1f             \n"

 "       movl    $1,-8(%ebp)    \n"

 "1:                            \n"

     );

 #elif defined(__sun) && defined(__amd64)

     __asm (

 "       pushfq                 \n"

 "       popq    %rax           \n"

 "       movq    %rax,%rcx      \n"

 "       xorl    $0x200000,%eax \n"

 "       pushq   %rax           \n"

 "       popfq                  \n"

 "       pushfq                 \n"

 "       popq    %rax           \n"

 "       xorl    %ecx,%eax      \n"

 "       jz      1f             \n"

 "       movl    $1,-8(%rbp)    \n"

 "1:                            \n"

     );

 #endif

 #endif

 /* *INDENT-ON* */

     return has_CPUID;

 }

 #if defined(__GNUC__) && defined(i386)

 #define cpuid(func, a, b, c, d) \

     __asm__ __volatile__ ( \

 "        pushl %%ebx        \n" \

 "        xorl %%ecx,%%ecx   \n" \

 "        cpuid              \n" \

 "        movl %%ebx, %%esi  \n" \

 "        popl %%ebx         \n" : \

             "=a" (a), "=S" (b), "=c" (c), "=d" (d) : "a" (func))

 #elif defined(__GNUC__) && defined(__x86_64__)

 #define cpuid(func, a, b, c, d) \

     __asm__ __volatile__ ( \

 "        pushq %%rbx        \n" \

 "        xorq %%rcx,%%rcx   \n" \

 "        cpuid              \n" \

 "        movq %%rbx, %%rsi  \n" \

 "        popq %%rbx         \n" : \

             "=a" (a), "=S" (b), "=c" (c), "=d" (d) : "a" (func))

 #elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)

 #define cpuid(func, a, b, c, d) \

     __asm { \

         __asm mov eax, func \

         __asm xor ecx, ecx \

         __asm cpuid \

         __asm mov a, eax \

         __asm mov b, ebx \

         __asm mov c, ecx \

         __asm mov d, edx \

 }

 #elif defined(_MSC_VER) && defined(_M_X64)

 #define cpuid(func, a, b, c, d) \

 { \

     int CPUInfo[4]; \

     __cpuid(CPUInfo, func); \

     a = CPUInfo[0]; \

     b = CPUInfo[1]; \

     c = CPUInfo[2]; \

     d = CPUInfo[3]; \

 }

 #else

 #define cpuid(func, a, b, c, d) \

     a = b = c = d = 0

 #endif

 static int

 CPU_getCPUIDFeatures(void)

 {

     int features = 0;

     int a, b, c, d;

     cpuid(0, a, b, c, d);

     if (a >= 1) {

         cpuid(1, a, b, c, d);

         features = d;

     }

     return features;

 }

 static SDL_bool

 CPU_OSSavesYMM(void)

 {

     int a, b, c, d;

     /* Check to make sure we can call xgetbv */

     cpuid(0, a, b, c, d);

     if (a < 1) {

         return SDL_FALSE;

     }

     cpuid(1, a, b, c, d);

     if (!(c & 0x08000000)) {

         return SDL_FALSE;

     }

     /* Call xgetbv to see if YMM register state is saved */

     a = 0;

 #if defined(__GNUC__) && (defined(i386) || defined(__x86_64__))

     asm(".byte 0x0f, 0x01, 0xd0" : "=a" (a) : "c" (0) : "%edx");

 #elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64)) && (_MSC_FULL_VER >= 160040219) /* VS2010 SP1 */

     a = (int)_xgetbv(0);

 #elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)

     __asm

     {

         xor ecx, ecx

         _asm _emit 0x0f _asm _emit 0x01 _asm _emit 0xd0

         mov a, eax

     }

 #endif

     return ((a & 6) == 6) ? SDL_TRUE : SDL_FALSE;

 }

 static int

 CPU_haveRDTSC(void)

 {

     if (CPU_haveCPUID()) {

         return (CPU_getCPUIDFeatures() & 0x00000010);

     }

     return 0;

 }

 static int

 CPU_haveAltiVec(void)

 {

     volatile int altivec = 0;

 #ifndef SDL_CPUINFO_DISABLED

 #if (defined(__MACOSX__) && (defined(__ppc__) || defined(__ppc64__))) || (defined(__OpenBSD__) && defined(__powerpc__))

 #ifdef __OpenBSD__

     int selectors[2] = { CTL_MACHDEP, CPU_ALTIVEC };

 #else

     int selectors[2] = { CTL_HW, HW_VECTORUNIT };

 #endif

     int hasVectorUnit = 0;

     size_t length = sizeof(hasVectorUnit);

     int error = sysctl(selectors, 2, &hasVectorUnit, &length, NULL, 0);

     if (0 == error)

         altivec = (hasVectorUnit != 0);

 #elif SDL_ALTIVEC_BLITTERS && HAVE_SETJMP

     void (*handler) (int sig);

     handler = signal(SIGILL, illegal_instruction);

     if (setjmp(jmpbuf) == 0) {

         asm volatile ("mtspr 256, %0\n\t" "vand %%v0, %%v0, %%v0"::"r" (-1));

         altivec = 1;

     }

     signal(SIGILL, handler);

 #endif

 #endif

     return altivec;

 }

 static int

 CPU_haveMMX(void)

 {

     if (CPU_haveCPUID()) {

         return (CPU_getCPUIDFeatures() & 0x00800000);

     }

     return 0;

 }

 static int

 CPU_have3DNow(void)

 {

     if (CPU_haveCPUID()) {

         int a, b, c, d;

         cpuid(0x80000000, a, b, c, d);

         if (a >= 0x80000001) {

             cpuid(0x80000001, a, b, c, d);

             return (d & 0x80000000);

         }

     }

     return 0;

 }

 static int

 CPU_haveSSE(void)

 {

     if (CPU_haveCPUID()) {

         return (CPU_getCPUIDFeatures() & 0x02000000);

     }

     return 0;

 }

 static int

 CPU_haveSSE2(void)

 {

     if (CPU_haveCPUID()) {

         return (CPU_getCPUIDFeatures() & 0x04000000);

     }

     return 0;

 }

 static int

 CPU_haveSSE3(void)

 {

     if (CPU_haveCPUID()) {

         int a, b, c, d;

         cpuid(0, a, b, c, d);

         if (a >= 1) {

             cpuid(1, a, b, c, d);

             return (c & 0x00000001);

         }

     }

     return 0;

 }

 static int

 CPU_haveSSE41(void)

 {

     if (CPU_haveCPUID()) {

         int a, b, c, d;

         cpuid(0, a, b, c, d);

         if (a >= 1) {

             cpuid(1, a, b, c, d);

             return (c & 0x00080000);

         }

     }

     return 0;

 }

 static int

 CPU_haveSSE42(void)

 {

     if (CPU_haveCPUID()) {

         int a, b, c, d;

         cpuid(0, a, b, c, d);

         if (a >= 1) {

             cpuid(1, a, b, c, d);

             return (c & 0x00100000);

         }

     }

     return 0;

 }

 static int

 CPU_haveAVX(void)

 {

     if (CPU_haveCPUID() && CPU_OSSavesYMM()) {

         int a, b, c, d;

         cpuid(0, a, b, c, d);

         if (a >= 1) {

             cpuid(1, a, b, c, d);

             return (c & 0x10000000);

         }

     }

     return 0;

 }

 static int

 CPU_haveAVX2(void)

 {

     if (CPU_haveCPUID() && CPU_OSSavesYMM()) {

         int a, b, c, d;

         cpuid(0, a, b, c, d);

         if (a >= 7) {

             cpuid(7, a, b, c, d);

             return (b & 0x00000020);

         }

     }

     return 0;

 }

 static int SDL_CPUCount = 0;

 int

 SDL_GetCPUCount(void)

 {

     if (!SDL_CPUCount) {

 #ifndef SDL_CPUINFO_DISABLED

 #if defined(HAVE_SYSCONF) && defined(_SC_NPROCESSORS_ONLN)

         if (SDL_CPUCount <= 0) {

             SDL_CPUCount = (int)sysconf(_SC_NPROCESSORS_ONLN);

         }

 #endif

 #ifdef HAVE_SYSCTLBYNAME

         if (SDL_CPUCount <= 0) {

             size_t size = sizeof(SDL_CPUCount);

             sysctlbyname("hw.ncpu", &SDL_CPUCount, &size, NULL, 0);

         }

 #endif

 #ifdef __WIN32__

         if (SDL_CPUCount <= 0) {

             SYSTEM_INFO info;

             GetSystemInfo(&info);

             SDL_CPUCount = info.dwNumberOfProcessors;

         }

 #endif

 #endif

         /* There has to be at least 1, right? :) */

         if (SDL_CPUCount <= 0) {

             SDL_CPUCount = 1;

         }

     }

     return SDL_CPUCount;

 }

 /* Oh, such a sweet sweet trick, just not very useful. :) */

 static const char *

 SDL_GetCPUType(void)

 {

     static char SDL_CPUType[13];

     if (!SDL_CPUType[0]) {

         int i = 0;

         if (CPU_haveCPUID()) {

             int a, b, c, d;

             cpuid(0x00000000, a, b, c, d);

             (void) a;

             SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;

             SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;

             SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;

             SDL_CPUType[i++] = (char)(b & 0xff);

             SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;

             SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;

             SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;

             SDL_CPUType[i++] = (char)(d & 0xff);

             SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;

             SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;

             SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;

             SDL_CPUType[i++] = (char)(c & 0xff);

         }

         if (!SDL_CPUType[0]) {

             SDL_strlcpy(SDL_CPUType, "Unknown", sizeof(SDL_CPUType));

         }

     }

     return SDL_CPUType;

 }

 #ifdef TEST_MAIN  /* !!! FIXME: only used for test at the moment. */

 static const char *

 SDL_GetCPUName(void)

 {

     static char SDL_CPUName[48];

     if (!SDL_CPUName[0]) {

         int i = 0;

         int a, b, c, d;

         if (CPU_haveCPUID()) {

             cpuid(0x80000000, a, b, c, d);

             if (a >= 0x80000004) {

                 cpuid(0x80000002, a, b, c, d);

                 SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;

                 SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;

                 SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;

                 SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;

                 SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;

                 SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;

                 SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;

                 SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;

                 SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;

                 SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;

                 SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;

                 SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;

                 SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;

                 SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;

                 SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;

                 SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;

                 cpuid(0x80000003, a, b, c, d);

                 SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;

                 SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;

                 SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;

                 SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;

                 SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;

                 SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;

                 SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;

                 SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;

                 SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;

                 SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;

                 SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;

                 SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;

                 SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;

                 SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;

                 SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;

                 SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;

                 cpuid(0x80000004, a, b, c, d);

                 SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;

                 SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;

                 SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;

                 SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;

                 SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;

                 SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;

                 SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;

                 SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;

                 SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;

                 SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;

                 SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;

                 SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;

                 SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;

                 SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;

                 SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;

                 SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;

             }

         }

         if (!SDL_CPUName[0]) {

             SDL_strlcpy(SDL_CPUName, "Unknown", sizeof(SDL_CPUName));

         }

     }

     return SDL_CPUName;

 }

 #endif

 int

 SDL_GetCPUCacheLineSize(void)

 {

     const char *cpuType = SDL_GetCPUType();

     int a, b, c, d;

     (void) a; (void) b; (void) c; (void) d;

     if (SDL_strcmp(cpuType, "GenuineIntel") == 0) {

         cpuid(0x00000001, a, b, c, d);

         return (((b >> 8) & 0xff) * 8);

     } else if (SDL_strcmp(cpuType, "AuthenticAMD") == 0) {

         cpuid(0x80000005, a, b, c, d);

         return (c & 0xff);

     } else {

         /* Just make a guess here... */

         return SDL_CACHELINE_SIZE;

     }

 }

 static Uint32 SDL_CPUFeatures = 0xFFFFFFFF;

 static Uint32

 SDL_GetCPUFeatures(void)

 {

     if (SDL_CPUFeatures == 0xFFFFFFFF) {

         SDL_CPUFeatures = 0;

         if (CPU_haveRDTSC()) {

             SDL_CPUFeatures |= CPU_HAS_RDTSC;

         }

         if (CPU_haveAltiVec()) {

             SDL_CPUFeatures |= CPU_HAS_ALTIVEC;

         }

         if (CPU_haveMMX()) {

             SDL_CPUFeatures |= CPU_HAS_MMX;

         }

         if (CPU_have3DNow()) {

             SDL_CPUFeatures |= CPU_HAS_3DNOW;

         }

         if (CPU_haveSSE()) {

             SDL_CPUFeatures |= CPU_HAS_SSE;

         }

         if (CPU_haveSSE2()) {

             SDL_CPUFeatures |= CPU_HAS_SSE2;

         }

         if (CPU_haveSSE3()) {

             SDL_CPUFeatures |= CPU_HAS_SSE3;

         }

         if (CPU_haveSSE41()) {

             SDL_CPUFeatures |= CPU_HAS_SSE41;

         }

         if (CPU_haveSSE42()) {

             SDL_CPUFeatures |= CPU_HAS_SSE42;

         }

         if (CPU_haveAVX()) {

             SDL_CPUFeatures |= CPU_HAS_AVX;

         }

         if (CPU_haveAVX2()) {

             SDL_CPUFeatures |= CPU_HAS_AVX2;

         }

     }

     return SDL_CPUFeatures;

 }

 SDL_bool

 SDL_HasRDTSC(void)

 {

     if (SDL_GetCPUFeatures() & CPU_HAS_RDTSC) {

         return SDL_TRUE;

     }

     return SDL_FALSE;

 }

 SDL_bool

 SDL_HasAltiVec(void)

 {

     if (SDL_GetCPUFeatures() & CPU_HAS_ALTIVEC) {

         return SDL_TRUE;

     }

     return SDL_FALSE;

 }

 SDL_bool

 SDL_HasMMX(void)

 {

     if (SDL_GetCPUFeatures() & CPU_HAS_MMX) {

         return SDL_TRUE;

     }

     return SDL_FALSE;

 }

 SDL_bool

 SDL_Has3DNow(void)

 {

     if (SDL_GetCPUFeatures() & CPU_HAS_3DNOW) {

         return SDL_TRUE;

     }

     return SDL_FALSE;

 }

 SDL_bool

 SDL_HasSSE(void)

 {

     if (SDL_GetCPUFeatures() & CPU_HAS_SSE) {

         return SDL_TRUE;

     }

     return SDL_FALSE;

 }

 SDL_bool

 SDL_HasSSE2(void)

 {

     if (SDL_GetCPUFeatures() & CPU_HAS_SSE2) {

         return SDL_TRUE;

     }

     return SDL_FALSE;

 }

 SDL_bool

 SDL_HasSSE3(void)

 {

     if (SDL_GetCPUFeatures() & CPU_HAS_SSE3) {

         return SDL_TRUE;

     }

     return SDL_FALSE;

 }

 SDL_bool

 SDL_HasSSE41(void)

 {

     if (SDL_GetCPUFeatures() & CPU_HAS_SSE41) {

         return SDL_TRUE;

     }

     return SDL_FALSE;

 }

 SDL_bool

 SDL_HasSSE42(void)

 {

     if (SDL_GetCPUFeatures() & CPU_HAS_SSE42) {

         return SDL_TRUE;

     }

     return SDL_FALSE;

 }

 SDL_bool

 SDL_HasAVX(void)

 {

     if (SDL_GetCPUFeatures() & CPU_HAS_AVX) {

         return SDL_TRUE;

     }

     return SDL_FALSE;

 }

 SDL_bool

 SDL_HasAVX2(void)

 {

     if (SDL_GetCPUFeatures() & CPU_HAS_AVX2) {

         return SDL_TRUE;

     }

     return SDL_FALSE;

 }

 static int SDL_SystemRAM = 0;

 int

 SDL_GetSystemRAM(void)

 {

     if (!SDL_SystemRAM) {

 #ifndef SDL_CPUINFO_DISABLED

 #if defined(HAVE_SYSCONF) && defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE)

         if (SDL_SystemRAM <= 0) {

             SDL_SystemRAM = (int)((Sint64)sysconf(_SC_PHYS_PAGES) * sysconf(_SC_PAGESIZE) / (1024*1024));

         }

 #endif

 #ifdef HAVE_SYSCTLBYNAME

         if (SDL_SystemRAM <= 0) {

 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)

 #ifdef HW_REALMEM

             int mib[2] = {CTL_HW, HW_REALMEM};

 #else

             /* might only report up to 2 GiB */

             int mib[2] = {CTL_HW, HW_PHYSMEM};

 #endif /* HW_REALMEM */

 #else

             int mib[2] = {CTL_HW, HW_MEMSIZE};

 #endif /* __FreeBSD__ || __FreeBSD_kernel__ */

             Uint64 memsize = 0;

             size_t len = sizeof(memsize);

             if (sysctl(mib, 2, &memsize, &len, NULL, 0) == 0) {

                 SDL_SystemRAM = (int)(memsize / (1024*1024));

             }

         }

 #endif

 #ifdef __WIN32__

         if (SDL_SystemRAM <= 0) {

             MEMORYSTATUSEX stat;

             stat.dwLength = sizeof(stat);

             if (GlobalMemoryStatusEx(&stat)) {

                 SDL_SystemRAM = (int)(stat.ullTotalPhys / (1024 * 1024));

             }

         }

 #endif

 #endif

     }

     return SDL_SystemRAM;

 }

 #ifdef TEST_MAIN

 #include <stdio.h>

 int

 main()

 {

     printf("CPU count: %d\n", SDL_GetCPUCount());

     printf("CPU type: %s\n", SDL_GetCPUType());

     printf("CPU name: %s\n", SDL_GetCPUName());

     printf("CacheLine size: %d\n", SDL_GetCPUCacheLineSize());

     printf("RDTSC: %d\n", SDL_HasRDTSC());

     printf("Altivec: %d\n", SDL_HasAltiVec());

     printf("MMX: %d\n", SDL_HasMMX());

     printf("3DNow: %d\n", SDL_Has3DNow());

     printf("SSE: %d\n", SDL_HasSSE());

     printf("SSE2: %d\n", SDL_HasSSE2());

     printf("SSE3: %d\n", SDL_HasSSE3());

     printf("SSE4.1: %d\n", SDL_HasSSE41());

     printf("SSE4.2: %d\n", SDL_HasSSE42());

     printf("AVX: %d\n", SDL_HasAVX());

     printf("AVX2: %d\n", SDL_HasAVX2());

     printf("RAM: %d MB\n", SDL_GetSystemRAM());

     return 0;

 }

 #endif /* TEST_MAIN */

 /* vi: set ts=4 sw=4 expandtab: */