代码

#include <stdio.h>
#include <stdint.h>

static inline void cpuid(uint32_t eax, uint32_t ecx, uint32_t* abcd) {
    asm volatile("cpuid"
                 : "=a"(abcd[0]), "=b"(abcd[1]), "=c"(abcd[2]), "=d"(abcd[3])
                 : "a"(eax), "c"(ecx));
}

int main() {
    uint32_t abcd[4];
    cpuid(0, 0, abcd);
    uint32_t max_eax = abcd[0];
    char model_name[49];
    
    for (uint32_t i = 0x80000002; i <= 0x80000004; i++) {
        cpuid(i, 0, abcd);
        for (int j = 0; j < 4; j++) {
            model_name[(i - 0x80000002) * 16 + j * 4 + 0] = abcd[j] & 0xff;
            model_name[(i - 0x80000002) * 16 + j * 4 + 1] = (abcd[j] >> 8) & 0xff;
            model_name[(i - 0x80000002) * 16 + j * 4 + 2] = (abcd[j] >> 16) & 0xff;
            model_name[(i - 0x80000002) * 16 + j * 4 + 3] = (abcd[j] >> 24) & 0xff;
        }
    }
    model_name[48] = '\0';
    printf("%s\n", model_name);
}

评测结果