这是预期的吗?我希望我的 Sandy Bridge CPU 报告它可以处理 MMX、SSE 和 SSE2 指令。这些位是否没有设置,因为这些“旧”指令集已被一些新指令集“取代”?
我在这里使用此代码将 CPU 检测放入我的代码中。
#include "CPUID.h"
int main(int argc, char *argv[]) {
CPUID cpuid;
cpuid.load(0);
printf("CPU: %.4s%.4s%.4s",
(const char*)&cpuid.EBX(),
(const char*)&cpuid.EDX(),
(const char*)&cpuid.ECX()
);
char brand[0x30];
cpuid.load(0x80000002); memcpy(brand,&cpuid.EAX(),16);
cpuid.load(0x80000003); memcpy(brand+16,&cpuid.EAX(),16);
cpuid.load(0x80000004); memcpy(brand+32,&cpuid.EAX(),16);
printf("%.48s\n",brand);
cpuid.load(1);
// tests bit 23 of ECX for popcnt instruction support
printf("MMX - %s\n", cpuid.EAX() & (1 << 23) ? "yes" : "no");
printf("SSE - %s\n", cpuid.EAX() & (1 << 25) ? "yes" : "no");
printf("SSE2 - %s\n", cpuid.EAX() & (1 << 26) ? "yes" : "no");
printf("SSE3 - %s\n", cpuid.ECX() & (1 << 0) ? "yes" : "no");
printf("SSSE3 - %s\n", cpuid.ECX() & (1 << 9) ? "yes" : "no");
printf("SSE4.1 - %s\n", cpuid.ECX() & (1 << 19) ? "yes" : "no");
printf("SSE4.2 - %s\n", cpuid.ECX() & (1 << 20) ? "yes" : "no");
printf("AES - %s\n", cpuid.ECX() & (1 << 25) ? "yes" : "no");
printf("AVX - %s\n", cpuid.ECX() & (1 << 28) ? "yes" : "no");
printf("HT - %s\n", cpuid.EAX() & (1 << 28) ? "yes" : "no");
printf("IA64 (emulating x86) - %s\n", cpuid.EAX() & (1 << 30) ? "yes" : "no");
printf("Hypervisor? - %s\n", cpuid.ECX() & (1 << 31) ? "yes" : "no");
printf("popcnt - %s\n", cpuid.ECX() & (1 << 23) ? "yes" : "no");
return 0;
}
输出:
CPU: GenuineIntel Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz
MMX - no
SSE - no
SSE2 - no
SSE3 - yes
SSSE3 - yes
SSE4.1 - yes
SSE4.2 - yes
AES - yes
AVX - yes
HT - no
IA64 (emulating x86) - no
Hypervisor? - no
popcnt - yes