Question

#include <stdio.h>

int sum (int L, int U) {
    if (L == U) return L;
 else {
    int lower, upper;
    int mid = (U+L)/2;
    lower = sum (L, mid);
    upper = sum(mid+1, U);
    return (lower+upper);
 }
}
int main(){
        int x,y;
        scanf("%d %d",&x,&y);
        printf("The result is: %d\n",sum(x,y));
}

Answer 1

我会屈服于讽刺的诱惑并发布这个：

    .file   1 "hello.c"
    .section .mdebug.abi32
    .previous
    .gnu_attribute 4, 1
    .text
    .align  2
    .globl  sum
    .set    nomips16
    .ent    sum
    .type   sum, @function
sum:
    .frame  $sp,40,$31      # vars= 16, regs= 1/0, args= 16, gp= 0
    .mask   0x80000000,-4
    .fmask  0x00000000,0
    .set    noreorder
    .set    nomacro
    addiu   $sp,$sp,-40
    sw  $31,36($sp)
    sw  $4,40($sp)
    sw  $5,44($sp)
    lw  $3,40($sp)
    lw  $2,44($sp)
    nop
    bne $3,$2,$L2
    nop

    lw  $2,40($sp)
    j   $L3
    nop

$L2:
    lw  $3,44($sp)
    lw  $2,40($sp)
    nop
    addu    $2,$3,$2
    srl $3,$2,31
    addu    $2,$3,$2
    sra $2,$2,1
    sw  $2,16($sp)
    lw  $4,40($sp)
    lw  $5,16($sp)
    jal sum
    nop

    sw  $2,20($sp)
    lw  $2,16($sp)
    nop
    addiu   $2,$2,1
    move    $4,$2
    lw  $5,44($sp)
    jal sum
    nop

    sw  $2,24($sp)
    lw  $3,20($sp)
    lw  $2,24($sp)
    nop
    addu    $2,$3,$2
$L3:
    lw  $31,36($sp)
    addiu   $sp,$sp,40
    j   $31
    nop

    .set    macro
    .set    reorder
    .end    sum
    .size   sum, .-sum
    .rdata
    .align  2
$LC0:
    .ascii  "%d %d\000"
    .align  2
$LC1:
    .ascii  "The result is: %d\012\000"
    .text
    .align  2
    .globl  main
    .set    nomips16
    .ent    main
    .type   main, @function
main:
    .frame  $sp,32,$31      # vars= 8, regs= 2/0, args= 16, gp= 0
    .mask   0x80010000,-4
    .fmask  0x00000000,0
    .set    noreorder
    .set    nomacro
    addiu   $sp,$sp,-32
    sw  $31,28($sp)
    sw  $16,24($sp)
    lui $2,%hi($LC0)
    addiu   $3,$2,%lo($LC0)
    addiu   $2,$sp,20
    move    $4,$3
    addiu   $3,$sp,16
    move    $5,$3
    move    $6,$2
    jal scanf
    nop

    lui $2,%hi($LC1)
    addiu   $16,$2,%lo($LC1)
    lw  $3,16($sp)
    lw  $2,20($sp)
    move    $4,$3
    move    $5,$2
    jal sum
    nop

    move    $4,$16
    move    $5,$2
    jal printf
    nop

    lw  $31,28($sp)
    lw  $16,24($sp)
    addiu   $sp,$sp,32
    j   $31
    nop

    .set    macro
    .set    reorder
    .end    main
    .size   main, .-main
    .ident  "GCC: (GNU) 4.5.2"

这是由我刚刚为mips-linux-elf目标构建的GCC交叉编译器生成的，使用以下命令行：

mips-linux-elf-gcc -fomit-frame-pointer -S hello.c

由于您使用的是Windows，因此您应该在Google上搜索mips cross-compiler for windows。

之类的内容

你到底想做什么？

用于mips汇编的C代码

1 个答案: