Edit
kc3-lang/SDL/src/cpuinfo
Sam Lantinga
- SDL_cpuinfo.c
-
/* Simple DirectMedia Layer Copyright (C) 1997-2017 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 #if (defined(__LINUX__) || defined(__ANDROID__)) && defined(__ARM_ARCH) /*#include <asm/hwcap.h>*/ #ifndef AT_HWCAP #define AT_HWCAP 16 #endif #ifndef HWCAP_NEON #define HWCAP_NEON (1 << 12) #endif #if defined HAVE_GETAUXVAL #include <sys/auxv.h> #else #include <fcntl.h> #endif #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 #define CPU_HAS_NEON 0x00001000 #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_CPUIDFeatures[4]; static int CPU_CPUIDMaxFunction = 0; static SDL_bool CPU_OSSavesYMM = SDL_FALSE; static void CPU_calcCPUIDFeatures(void) { static SDL_bool checked = SDL_FALSE; if (!checked) { checked = SDL_TRUE; if (CPU_haveCPUID()) { int a, b, c, d; cpuid(0, a, b, c, d); CPU_CPUIDMaxFunction = a; if (CPU_CPUIDMaxFunction >= 1) { cpuid(1, a, b, c, d); CPU_CPUIDFeatures[0] = a; CPU_CPUIDFeatures[1] = b; CPU_CPUIDFeatures[2] = c; CPU_CPUIDFeatures[3] = d; /* Check to make sure we can call xgetbv */ if (c & 0x08000000) { /* Call xgetbv to see if YMM register state is saved */ #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 CPU_OSSavesYMM = ((a & 6) == 6) ? SDL_TRUE : SDL_FALSE; } } } } } 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; } #if (defined(__LINUX__) || defined(__ANDROID__)) && defined(__ARM_ARCH) && !defined(HAVE_GETAUXVAL) static int readProcAuxvForNeon(void) { int neon = 0; int kv[2]; const int fd = open("/proc/self/auxv", O_RDONLY); if (fd != -1) { while (read(fd, kv, sizeof (kv)) == sizeof (kv)) { if (kv[0] == AT_HWCAP) { neon = ((kv[1] & HWCAP_NEON) == HWCAP_NEON); break; } } close(fd); } return neon; } #endif static int CPU_haveNEON(void) { /* The way you detect NEON is a privileged instruction on ARM, so you have query the OS kernel in a platform-specific way. :/ */ #if defined(SDL_CPUINFO_DISABLED) || !defined(__ARM_ARCH) return 0; /* disabled or not an ARM CPU at all. */ #elif __ARM_ARCH >= 8 return 1; /* ARMv8 always has non-optional NEON support. */ #elif defined(__APPLE__) && (__ARM_ARCH >= 7) /* (note that sysctlbyname("hw.optional.neon") doesn't work!) */ return 1; /* all Apple ARMv7 chips and later have NEON. */ #elif defined(__APPLE__) return 0; /* assune anything else from Apple doesn't have NEON. */ #elif (defined(__LINUX__) || defined(__ANDROID__)) && defined(HAVE_GETAUXVAL) return ((getauxval(AT_HWCAP) & HWCAP_NEON) == HWCAP_NEON); #elif (defined(__LINUX__) || defined(__ANDROID__)) return readProcAuxvForNeon(); /* Android offers a static library for this, but it just parses /proc/self/auxv */ #elif (defined(__WINDOWS__) || defined(__WINRT__)) && defined(_M_ARM) /* All WinRT ARM devices are required to support NEON, but just in case. */ return IsProcessorFeaturePresent(PF_ARM_NEON_INSTRUCTIONS_AVAILABLE) != 0; #else #warning SDL_HasNEON is not implemented for this ARM platform. Write me. return 0; #endif } static int CPU_have3DNow(void) { if (CPU_CPUIDMaxFunction > 0) { /* that is, do we have CPUID at all? */ 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; } #define CPU_haveRDTSC() (CPU_CPUIDFeatures[3] & 0x00000010) #define CPU_haveMMX() (CPU_CPUIDFeatures[3] & 0x00800000) #define CPU_haveSSE() (CPU_CPUIDFeatures[3] & 0x02000000) #define CPU_haveSSE2() (CPU_CPUIDFeatures[3] & 0x04000000) #define CPU_haveSSE3() (CPU_CPUIDFeatures[2] & 0x00000001) #define CPU_haveSSE41() (CPU_CPUIDFeatures[2] & 0x00080000) #define CPU_haveSSE42() (CPU_CPUIDFeatures[2] & 0x00100000) #define CPU_haveAVX() (CPU_OSSavesYMM && (CPU_CPUIDFeatures[2] & 0x10000000)) static int CPU_haveAVX2(void) { if (CPU_OSSavesYMM && (CPU_CPUIDMaxFunction >= 7)) { int a, b, c, d; (void) a; (void) b; (void) c; (void) d; /* compiler warnings... */ 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; CPU_calcCPUIDFeatures(); if (CPU_CPUIDMaxFunction > 0) { /* do we have CPUID at all? */ 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; CPU_calcCPUIDFeatures(); if (CPU_CPUIDMaxFunction > 0) { /* do we have CPUID at all? */ 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) { CPU_calcCPUIDFeatures(); 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; } if (CPU_haveNEON()) { SDL_CPUFeatures |= CPU_HAS_NEON; } } return SDL_CPUFeatures; } #define CPU_FEATURE_AVAILABLE(f) ((SDL_GetCPUFeatures() & f) ? SDL_TRUE : SDL_FALSE) SDL_bool SDL_HasRDTSC(void) { return CPU_FEATURE_AVAILABLE(CPU_HAS_RDTSC); } SDL_bool SDL_HasAltiVec(void) { return CPU_FEATURE_AVAILABLE(CPU_HAS_ALTIVEC); } SDL_bool SDL_HasMMX(void) { return CPU_FEATURE_AVAILABLE(CPU_HAS_MMX); } SDL_bool SDL_Has3DNow(void) { return CPU_FEATURE_AVAILABLE(CPU_HAS_3DNOW); } SDL_bool SDL_HasSSE(void) { return CPU_FEATURE_AVAILABLE(CPU_HAS_SSE); } SDL_bool SDL_HasSSE2(void) { return CPU_FEATURE_AVAILABLE(CPU_HAS_SSE2); } SDL_bool SDL_HasSSE3(void) { return CPU_FEATURE_AVAILABLE(CPU_HAS_SSE3); } SDL_bool SDL_HasSSE41(void) { return CPU_FEATURE_AVAILABLE(CPU_HAS_SSE41); } SDL_bool SDL_HasSSE42(void) { return CPU_FEATURE_AVAILABLE(CPU_HAS_SSE42); } SDL_bool SDL_HasAVX(void) { return CPU_FEATURE_AVAILABLE(CPU_HAS_AVX); } SDL_bool SDL_HasAVX2(void) { return CPU_FEATURE_AVAILABLE(CPU_HAS_AVX2); } SDL_bool SDL_HasNEON(void) { return CPU_FEATURE_AVAILABLE(CPU_HAS_NEON); } 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__) || defined(__NetBSD__) #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("NEON: %d\n", SDL_HasNEON()); printf("RAM: %d MB\n", SDL_GetSystemRAM()); return 0; } #endif /* TEST_MAIN */ /* vi: set ts=4 sw=4 expandtab: */