user: 下面的汇编指令对应的C源代码是什么:

```asm
<levenshtein_distance>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x60,%rsp
  mov    %rdi,-0x58(%rbp)
  mov    %rsi,-0x60(%rbp)
  mov    -0x58(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %rax,-0x28(%rbp)
  mov    -0x60(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %rax,-0x20(%rbp)
  mov    -0x28(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x20(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x18(%rbp),%rax
  imul   -0x10(%rbp),%rax
  shl    $0x2,%rax
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    %rax,-0x8(%rbp)
  cmpq   $0x0,-0x8(%rbp)
  jne    L70
  mov    $0xffffffff,%eax
  jmp    L3
L70:
  movq   $0x0,-0x38(%rbp)
  jmp    L9
L65:
  mov    -0x38(%rbp),%rax
  imul   -0x10(%rbp),%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    -0x38(%rbp),%rdx
  mov    %edx,(%rax)
  addq   $0x1,-0x38(%rbp)
L9:
  mov    -0x38(%rbp),%rax
  cmp    -0x18(%rbp),%rax
  jb     L65
  movq   $0x0,-0x30(%rbp)
  jmp    L6
L84:
  mov    -0x30(%rbp),%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    -0x30(%rbp),%rdx
  mov    %edx,(%rax)
  addq   $0x1,-0x30(%rbp)
L6:
  mov    -0x30(%rbp),%rax
  cmp    -0x10(%rbp),%rax
  jb     L84
  movq   $0x1,-0x30(%rbp)
  jmp    L15
L115:
  movq   $0x1,-0x38(%rbp)
  jmp    L56
L14:
  mov    -0x38(%rbp),%rax
  lea    -0x1(%rax),%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%edx
  mov    -0x30(%rbp),%rax
  lea    -0x1(%rax),%rcx
  mov    -0x60(%rbp),%rax
  add    %rcx,%rax
  movzbl (%rax),%eax
  cmp    %al,%dl
  jne    L21
  mov    -0x38(%rbp),%rax
  sub    $0x1,%rax
  imul   -0x10(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  sub    $0x1,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x38(%rbp),%rax
  imul   -0x10(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rax,%rdx
  mov    (%rcx),%eax
  mov    %eax,(%rdx)
  jmp    L45
L21:
  mov    -0x38(%rbp),%rax
  sub    $0x1,%rax
  imul   -0x10(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  add    $0x1,%eax
  mov    %eax,-0x44(%rbp)
  mov    -0x38(%rbp),%rax
  imul   -0x10(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  sub    $0x1,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  add    $0x1,%eax
  mov    %eax,-0x40(%rbp)
  mov    -0x38(%rbp),%rax
  sub    $0x1,%rax
  imul   -0x10(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  sub    $0x1,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  add    $0x1,%eax
  mov    %eax,-0x3c(%rbp)
  mov    -0x3c(%rbp),%edx
  mov    -0x40(%rbp),%eax
  cmp    %eax,%edx
  cmova  %eax,%edx
  mov    -0x38(%rbp),%rax
  imul   -0x10(%rbp),%rax
  mov    %rax,%rcx
  mov    -0x30(%rbp),%rax
  add    %rcx,%rax
  lea    0x0(,%rax,4),%rcx
  mov    -0x8(%rbp),%rax
  add    %rax,%rcx
  mov    -0x44(%rbp),%eax
  cmp    %eax,%edx
  cmovbe %edx,%eax
  mov    %eax,(%rcx)
L45:
  addq   $0x1,-0x38(%rbp)
L56:
  mov    -0x38(%rbp),%rax
  cmp    -0x18(%rbp),%rax
  jb     L14
  addq   $0x1,-0x30(%rbp)
L15:
  mov    -0x30(%rbp),%rax
  cmp    -0x10(%rbp),%rax
  jb     L115
  mov    -0x10(%rbp),%rax
  imul   -0x18(%rbp),%rax
  shl    $0x2,%rax
  lea    -0x4(%rax),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x48(%rbp)
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x48(%rbp),%eax
L3:
  leave
  ret
```

assistant: ```c
int levenshtein_distance(const char *s1, const char *s2) {
  size_t s1_len = strlen(s1);
  size_t s2_len = strlen(s2);
  size_t rows = s1_len + 1;
  size_t cols = s2_len + 1;
  size_t i, j;
  unsigned result;
  unsigned d1, d2, d3;
  unsigned *dist = malloc(rows * cols * sizeof(unsigned));
  if (!dist) {
    return -1;
  }
  for (i = 0; i < rows; i++) {
    dist[i * cols] = i;
  }
  for (j = 0; j < cols; j++) {
    dist[j] = j;
  }
  for (j = 1; j < cols; j++) {
    for (i = 1; i < rows; i++) {
      if (s1[i - 1] == s2[j - 1]) {
        dist[(i * cols) + j] = dist[((i - 1) * cols) + (j - 1)];
      } else {
        d1 = dist[((i - 1) * cols) + j] + 1;
        d2 = dist[(i * cols) + (j - 1)] + 1;
        d3 = dist[((i - 1) * cols) + (j - 1)] + 1;
        dist[(i * cols) + j] = ((d1) < (((d2) < (d3) ? (d2) : (d3))) ? (d1) : (((d2) < (d3) ? (d2) : (d3))));
      }
    }
  }
  result = dist[(cols * rows) - 1];
  free(dist);
  return result;
}
```