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    (%rdi,%rax,4), %edx    \n"
        "        movl    4(%rdi,%rax,4), %ecx    \n"
        "        cmpl    %ecx, %edx    \n"
        "        jle     LABEL3    \n"
        "        movl    %ecx, (%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