ObjFW  Diff

#ifdef OF_HAIKU
# include <FindDirectory.h>
#endif
#ifdef OF_QNX
# include <sys/syspage.h>
#endif

#if defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
#if defined(OF_X86_64) || defined(OF_X86)
struct x86_regs {
	uint32_t eax, ebx, ecx, edx;
};
#endif

static size_t pageSize;
static size_t numberOfCPUs;

#if defined(OF_X86_64_ASM)
#if defined(OF_X86_64) || defined(OF_X86)
static OF_INLINE struct x86_regs OF_CONST_FUNC
x86_cpuid(uint32_t eax, uint32_t ecx)
{
	struct x86_regs regs;

# if defined(OF_X86_64_ASM)
	__asm__(
	    "cpuid"
	    : "=a"(regs.eax), "=b"(regs.ebx), "=c"(regs.ecx), "=d"(regs.edx)
	    : "a"(eax), "c"(ecx)
	);

	return regs;
}
#elif defined(OF_X86_ASM)
# elif deifned(OF_X86_ASM)
static OF_INLINE struct x86_regs OF_CONST_FUNC
x86_cpuid(uint32_t eax, uint32_t ecx)
{
	struct x86_regs regs;

	/*
	 * This workaround is required by GCC when using -fPIC, as ebx is a
	 * special register in PIC code. Yes, GCC is indeed not able to just
	 * push a register onto the stack before the __asm__ block and to pop
	 * it afterwards.
	 */
	__asm__(
	    "pushl	%%ebx\n\t"
	    "cpuid\n\t"
	    "movl	%%ebx, %1\n\t"
	    "popl	%%ebx"
	    : "=a"(regs.eax), "=r"(regs.ebx), "=c"(regs.ecx), "=d"(regs.edx)
	    : "a"(eax), "c"(ecx)
	);
# else
	memset(&regs, 0, sizeof(regs));
# endif

	return regs;
}
#endif

@implementation OFSystemInfo
+ (void)initialize

				  encoding: OF_STRING_ENCODING_ASCII
				    length: 12];
#else
	return nil;
#endif
}

#if defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
#if defined(OF_X86_64) || defined(OF_X86)
+ (bool)supportsMMX
{
	return (x86_cpuid(1, 0).edx & (1 << 23));
}

+ (bool)supportsSSE
{