Edit
kc3-lang/SDL/src/cpuinfo
David Ludwig
- SDL_cpuinfo.c
-
/* 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 #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 SDL_INLINE int CPU_haveCPUID(void) { int has_CPUID = 0; /* *INDENT-OFF* */ #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 /* *INDENT-ON* */ return has_CPUID; } #if defined(__GNUC__) && defined(i386) #define cpuid(func, a, b, c, d) \ __asm__ __volatile__ ( \ " pushl %%ebx \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" \ " 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 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 SDL_INLINE 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_INLINE int CPU_haveRDTSC(void) { if (CPU_haveCPUID()) { return (CPU_getCPUIDFeatures() & 0x00000010); } return 0; } static SDL_INLINE int CPU_haveAltiVec(void) { volatile int altivec = 0; #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 return altivec; } static SDL_INLINE int CPU_haveMMX(void) { if (CPU_haveCPUID()) { return (CPU_getCPUIDFeatures() & 0x00800000); } return 0; } static SDL_INLINE 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 SDL_INLINE int CPU_haveSSE(void) { if (CPU_haveCPUID()) { return (CPU_getCPUIDFeatures() & 0x02000000); } return 0; } static SDL_INLINE int CPU_haveSSE2(void) { if (CPU_haveCPUID()) { return (CPU_getCPUIDFeatures() & 0x04000000); } return 0; } static SDL_INLINE 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 SDL_INLINE int CPU_haveSSE41(void) { if (CPU_haveCPUID()) { int a, b, c, d; cpuid(1, a, b, c, d); if (a >= 1) { cpuid(1, a, b, c, d); return (c & 0x00080000); } } return 0; } static SDL_INLINE int CPU_haveSSE42(void) { if (CPU_haveCPUID()) { int a, b, c, d; cpuid(1, a, b, c, d); if (a >= 1) { cpuid(1, a, b, c, d); return (c & 0x00100000); } } return 0; } static SDL_INLINE int CPU_haveAVX(void) { if (CPU_haveCPUID()) { int a, b, c, d; cpuid(1, a, b, c, d); if (a >= 1) { cpuid(1, a, b, c, d); return (c & 0x10000000); } } return 0; } static int SDL_CPUCount = 0; int SDL_GetCPUCount(void) { if (!SDL_CPUCount) { #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 /* 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; int a, b, c, d; if (CPU_haveCPUID()) { cpuid(0x00000000, a, b, c, d); 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(); if (SDL_strcmp(cpuType, "GenuineIntel") == 0) { int a, b, c, d; cpuid(0x00000001, a, b, c, d); return (((b >> 8) & 0xff) * 8); } else if (SDL_strcmp(cpuType, "AuthenticAMD") == 0) { int a, b, c, d; 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; } } 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; } static int SDL_SystemRAM = 0; int SDL_GetSystemRAM(void) { if (!SDL_SystemRAM) { #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 } 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("RAM: %d MB\n", SDL_GetSystemRAM()); return 0; } #endif /* TEST_MAIN */ /* vi: set ts=4 sw=4 expandtab: */