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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 <setjmp.h>
#endif
#ifdef __WIN32__
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif

#define CPU_HAS_RDTSC 0x00000001
#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__))
#define cpuid(func, ax, bx, cx, dx) \
#define cpuid(func, a, b, c, d) \
__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__)
#define cpuid(func, ax, bx, cx, dx) \
asm { \
mov eax, func \
cpuid
mov ax, eax \
mov bx, ebx \
mov cx, ecx \
mov dx, edx \
#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 \
}
#else
#define cpuid(func, ax, bx, cx, dx) \
ax = bx = cx = dx = 0
#define cpuid(func, a, b, c, d) \
a = b = c = d = 0
#endif

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

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

cpuid(0x80000000, ax, bx, cx, dx);
if (ax >= 0x80000001) {
cpuid(0x80000001, ax, bx, cx, dx);
features = dx;
cpuid(0x80000000, a, b, c, d);
if (a >= 0x80000001) {
cpuid(0x80000001, a, b, c, d);
features = d;
}
return features;
}
Expand Down Expand Up @@ -290,8 +294,17 @@ SDL_GetCPUCount()
{
if (!SDL_CPUCount) {
#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
/* There has to be at least 1, right? :) */
if (!SDL_CPUCount) {
Expand All @@ -309,62 +322,62 @@ SDL_GetCPUType()

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

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

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