user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<CountingSort>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %rsi,-0x30(%rbp)
  mov    %rdx,-0x38(%rbp)
  mov    -0x38(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  mov    $0x4,%esi
  mov    %rax,%rdi
  call   <calloc@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x30(%rbp),%rax
  shl    $0x2,%rax
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    %rax,-0x8(%rbp)
  movq   $0x0,-0x20(%rbp)
  jmp    L57
L1:
  mov    -0x20(%rbp),%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  add    $0x1,%edx
  mov    %edx,(%rax)
  addq   $0x1,-0x20(%rbp)
L57:
  mov    -0x20(%rbp),%rax
  cmp    -0x30(%rbp),%rax
  jb     L1
  movq   $0x1,-0x20(%rbp)
  jmp    L64
L63:
  mov    -0x20(%rbp),%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%ecx
  mov    -0x20(%rbp),%rax
  shl    $0x2,%rax
  lea    -0x4(%rax),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x20(%rbp),%rax
  lea    0x0(,%rax,4),%rsi
  mov    -0x10(%rbp),%rax
  add    %rsi,%rax
  add    %ecx,%edx
  mov    %edx,(%rax)
  addq   $0x1,-0x20(%rbp)
L64:
  mov    -0x20(%rbp),%rax
  cmp    -0x18(%rbp),%rax
  jb     L63
  movq   $0x0,-0x20(%rbp)
  jmp    L77
L52:
  mov    -0x20(%rbp),%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mov    -0x20(%rbp),%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x28(%rbp),%rdx
  add    %rcx,%rdx
  mov    (%rdx),%edx
  movslq %edx,%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x10(%rbp),%rdx
  add    %rcx,%rdx
  mov    (%rdx),%edx
  movslq %edx,%rdx
  shl    $0x2,%rdx
  lea    -0x4(%rdx),%rcx
  mov    -0x8(%rbp),%rdx
  add    %rcx,%rdx
  mov    (%rax),%eax
  mov    %eax,(%rdx)
  mov    -0x20(%rbp),%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  sub    $0x1,%edx
  mov    %edx,(%rax)
  addq   $0x1,-0x20(%rbp)
L77:
  mov    -0x20(%rbp),%rax
  cmp    -0x30(%rbp),%rax
  jb     L52
  movq   $0x0,-0x20(%rbp)
  jmp    L74
L68:
  mov    -0x20(%rbp),%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    -0x20(%rbp),%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    -0x28(%rbp),%rdx
  add    %rcx,%rdx
  mov    (%rax),%eax
  mov    %eax,(%rdx)
  addq   $0x1,-0x20(%rbp)
L74:
  mov    -0x20(%rbp),%rax
  cmp    -0x30(%rbp),%rax
  jb     L68
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  nop
  leave
  ret
```

assistant: ```c
void CountingSort(int *arr, size_t n_data, size_t max_data) {
  size_t i, k = max_data + 1;
  int *occ, *out;
  occ = (int *)calloc(k, sizeof(*occ));
  out = (int *)malloc(n_data * sizeof(*out));
  for (i = 0; i < n_data; i++) {
    occ[arr[i]]++;
  }
  for (i = 1; i < k; i++) {
    occ[i] += occ[i - 1];
  }
  for (i = 0; i < n_data; i++) {
    out[occ[arr[i]] - 1] = arr[i];
    occ[arr[i]]--;
  }
  for (i = 0; i < n_data; i++) {
    arr[i] = out[i];
  }
  free(occ);
  free(out);
}
```