代码

void sort(unsigned *a, int n) {
    asm (
        "LABEL0:                                 \n"
        "        subl    $1, %esi                \n"
        "        testl   %esi, %esi              \n"
        "        jle     LABEL1                  \n"
        "LABEL5:                                 \n"
        "        xorl    %eax, %eax              \n"
        "LABEL4:                                 \n"
        "        movl    0(%rdi,%rax,4), %edx    \n"
        "        movl    4(%rdi,%rax,4), %ecx    \n"
        "        cmpl    %ecx, %edx              \n"
        "        jle     LABEL3                  \n"
        "        movl    %ecx, 0(%rdi,%rax,4)    \n"
        "        movl    %edx, 4(%rdi,%rax,4)    \n"
        "LABEL3:                                 \n"
        "        addq    $1, %rax                \n"
        "        cmpl    %eax, %esi              \n"
        "        jg      LABEL4                  \n"
        "        subl    $1, %esi                \n"
        "        jne     LABEL5                  \n"
        "LABEL1:                                 \n"
        "        ret                             \n"
    );
}

评测结果