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Implemented Windows version of SDL_GetCPUCount()
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@slouken
slouken committed Dec 16, 2009
1 parent 5d40417 commit 0e21efd
Showing 1 changed file with 91 additions and 78 deletions.
169 changes: 91 additions & 78 deletions src/cpuinfo/SDL_cpuinfo.c
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Expand Up @@ -35,6 +35,10 @@
#include <signal.h> #include <signal.h>
#include <setjmp.h> #include <setjmp.h>
#endif #endif
#ifdef __WIN32__
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif


#define CPU_HAS_RDTSC 0x00000001 #define CPU_HAS_RDTSC 0x00000001
#define CPU_HAS_MMX 0x00000002 #define CPU_HAS_MMX 0x00000002
Expand Down Expand Up @@ -151,34 +155,34 @@ CPUid by definition. But it's nice to be able to prove it. :) */
} }


#if defined(__GNUC__) && (defined(i386) || defined(__x86_64__)) #if defined(__GNUC__) && (defined(i386) || defined(__x86_64__))
#define cpuid(func, ax, bx, cx, dx) \ #define cpuid(func, a, b, c, d) \
__asm__ __volatile__ ("cpuid": \ __asm__ __volatile__ ("cpuid": \
"=a" (ax), "=b" (bx), "=c" (cx), "=d" (dx) : "a" (func)) "=a" (a), "=b" (b), "=c" (c), "=d" (d) : "a" (func))
#elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__) #elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)
#define cpuid(func, ax, bx, cx, dx) \ #define cpuid(func, a, b, c, d) \
asm { \ __asm { \
mov eax, func \ __asm mov eax, func \
cpuid __asm cpuid \
mov ax, eax \ __asm mov a, eax \
mov bx, ebx \ __asm mov b, ebx \
mov cx, ecx \ __asm mov c, ecx \
mov dx, edx \ __asm mov d, edx \
} }
#else #else
#define cpuid(func, ax, bx, cx, dx) \ #define cpuid(func, a, b, c, d) \
ax = bx = cx = dx = 0 a = b = c = d = 0
#endif #endif


static __inline__ int static __inline__ int
CPU_getCPUIDFeatures(void) CPU_getCPUIDFeatures(void)
{ {
int features = 0; int features = 0;
int ax, bx, cx, dx; int a, b, c, d;


cpuid(0, ax, bx, cx, dx); cpuid(0, a, b, c, d);
if (ax >= 1) { if (a >= 1) {
cpuid(1, ax, bx, cx, dx); cpuid(1, a, b, c, d);
features = dx; features = d;
} }
return features; return features;
} }
Expand All @@ -187,12 +191,12 @@ static __inline__ int
CPU_getCPUIDFeaturesExt(void) CPU_getCPUIDFeaturesExt(void)
{ {
int features = 0; int features = 0;
int ax, bx, cx, dx; int a, b, c, d;


cpuid(0x80000000, ax, bx, cx, dx); cpuid(0x80000000, a, b, c, d);
if (ax >= 0x80000001) { if (a >= 0x80000001) {
cpuid(0x80000001, ax, bx, cx, dx); cpuid(0x80000001, a, b, c, d);
features = dx; features = d;
} }
return features; return features;
} }
Expand Down Expand Up @@ -290,8 +294,17 @@ SDL_GetCPUCount()
{ {
if (!SDL_CPUCount) { if (!SDL_CPUCount) {
#ifdef HAVE_SYSCTLBYNAME #ifdef HAVE_SYSCTLBYNAME
size_t size = sizeof(SDL_CPUCount); {
sysctlbyname("hw.ncpu", &SDL_CPUCount, &size, NULL, 0); size_t size = sizeof(SDL_CPUCount);
sysctlbyname("hw.ncpu", &SDL_CPUCount, &size, NULL, 0);
}
#endif
#ifdef __WIN32__
{
SYSTEM_INFO info;
GetSystemInfo(&info);
SDL_CPUCount = info.dwNumberOfProcessors;
}
#endif #endif
/* There has to be at least 1, right? :) */ /* There has to be at least 1, right? :) */
if (!SDL_CPUCount) { if (!SDL_CPUCount) {
Expand All @@ -309,62 +322,62 @@ SDL_GetCPUType()


if (!SDL_CPUType[0]) { if (!SDL_CPUType[0]) {
int i = 0; int i = 0;
int ax, bx, cx, dx; int a, b, c, d;


if (CPU_haveCPUID()) { if (CPU_haveCPUID()) {
cpuid(0x80000000, ax, bx, cx, dx); cpuid(0x80000000, a, b, c, d);
if (ax >= 0x80000004) { if (a >= 0x80000004) {
cpuid(0x80000002, ax, bx, cx, dx); cpuid(0x80000002, a, b, c, d);
SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8; SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8; SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8; SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8; SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8; SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8; SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8; SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8; SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8; SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8; SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8; SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8; SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8; SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8; SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8; SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8; SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
cpuid(0x80000003, ax, bx, cx, dx); cpuid(0x80000003, a, b, c, d);
SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8; SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8; SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8; SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8; SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8; SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8; SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8; SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8; SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8; SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8; SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8; SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8; SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8; SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8; SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8; SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8; SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
cpuid(0x80000004, ax, bx, cx, dx); cpuid(0x80000004, a, b, c, d);
SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8; SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8; SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8; SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8; SDL_CPUType[i++] = (char)(a & 0xff); a >>= 8;
SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8; SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8; SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8; SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8; SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8; SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8; SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8; SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8; SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8; SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8; SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8; SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8; SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
} }
} }
if (!SDL_CPUType[0]) { if (!SDL_CPUType[0]) {
Expand Down

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