mirror of
https://github.com/joel16/SDL2.git
synced 2025-03-04 17:39:32 +00:00
Implemented Windows version of SDL_GetCPUCount()
--HG-- extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%404329
This commit is contained in:
Sam Lantinga
parent
29601c280b
commit
034bfdf70d
@ -35,6 +35,10 @@
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#include <signal.h>
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#include <setjmp.h>
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#endif
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#ifdef __WIN32__
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#endif
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#define CPU_HAS_RDTSC 0x00000001
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#define CPU_HAS_MMX 0x00000002
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@ -151,34 +155,34 @@ done:
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}
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#if defined(__GNUC__) && (defined(i386) || defined(__x86_64__))
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#define cpuid(func, ax, bx, cx, dx) \
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#define cpuid(func, a, b, c, d) \
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__asm__ __volatile__ ("cpuid": \
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"=a" (ax), "=b" (bx), "=c" (cx), "=d" (dx) : "a" (func))
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"=a" (a), "=b" (b), "=c" (c), "=d" (d) : "a" (func))
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#elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)
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#define cpuid(func, ax, bx, cx, dx) \
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asm { \
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mov eax, func \
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cpuid
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mov ax, eax \
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mov bx, ebx \
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mov cx, ecx \
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mov dx, edx \
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#define cpuid(func, a, b, c, d) \
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__asm { \
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__asm mov eax, func \
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__asm cpuid \
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__asm mov a, eax \
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__asm mov b, ebx \
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__asm mov c, ecx \
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__asm mov d, edx \
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}
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#else
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#define cpuid(func, ax, bx, cx, dx) \
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ax = bx = cx = dx = 0
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#define cpuid(func, a, b, c, d) \
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a = b = c = d = 0
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#endif
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static __inline__ int
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CPU_getCPUIDFeatures(void)
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{
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int features = 0;
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int ax, bx, cx, dx;
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int a, b, c, d;
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cpuid(0, ax, bx, cx, dx);
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if (ax >= 1) {
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cpuid(1, ax, bx, cx, dx);
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features = dx;
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cpuid(0, a, b, c, d);
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if (a >= 1) {
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cpuid(1, a, b, c, d);
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features = d;
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}
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return features;
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}
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@ -187,12 +191,12 @@ static __inline__ int
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CPU_getCPUIDFeaturesExt(void)
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{
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int features = 0;
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int ax, bx, cx, dx;
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int a, b, c, d;
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cpuid(0x80000000, ax, bx, cx, dx);
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if (ax >= 0x80000001) {
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cpuid(0x80000001, ax, bx, cx, dx);
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features = dx;
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cpuid(0x80000000, a, b, c, d);
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if (a >= 0x80000001) {
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cpuid(0x80000001, a, b, c, d);
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features = d;
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}
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return features;
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}
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@ -290,8 +294,17 @@ SDL_GetCPUCount()
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{
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if (!SDL_CPUCount) {
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#ifdef HAVE_SYSCTLBYNAME
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size_t size = sizeof(SDL_CPUCount);
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sysctlbyname("hw.ncpu", &SDL_CPUCount, &size, NULL, 0);
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{
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size_t size = sizeof(SDL_CPUCount);
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sysctlbyname("hw.ncpu", &SDL_CPUCount, &size, NULL, 0);
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}
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#endif
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#ifdef __WIN32__
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{
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SYSTEM_INFO info;
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GetSystemInfo(&info);
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SDL_CPUCount = info.dwNumberOfProcessors;
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}
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#endif
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/* There has to be at least 1, right? :) */
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if (!SDL_CPUCount) {
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@ -309,62 +322,62 @@ SDL_GetCPUType()
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if (!SDL_CPUType[0]) {
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int i = 0;
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int ax, bx, cx, dx;
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int a, b, c, d;
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if (CPU_haveCPUID()) {
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cpuid(0x80000000, ax, bx, cx, dx);
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if (ax >= 0x80000004) {
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cpuid(0x80000002, ax, bx, cx, dx);
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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cpuid(0x80000003, ax, bx, cx, dx);
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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cpuid(0x80000004, ax, bx, cx, dx);
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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cpuid(0x80000000, a, b, c, d);
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if (a >= 0x80000004) {
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cpuid(0x80000002, a, b, c, d);
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SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
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SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
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SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
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SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
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SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
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SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
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SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
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SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
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SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
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SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
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SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
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SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
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SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
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SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
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SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
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SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
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cpuid(0x80000003, a, b, c, d);
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SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
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SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
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SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
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SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
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SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
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SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
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SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
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SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
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SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
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SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
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SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
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SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
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SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
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SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
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SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
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SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
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cpuid(0x80000004, a, b, c, d);
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SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
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SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
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SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
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SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
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SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
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SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
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SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
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SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
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SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
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SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
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SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
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SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
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SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
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SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
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SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
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SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
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}
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}
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if (!SDL_CPUType[0]) {
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