user: 这段汇编代码用C语言表示是什么样的？

```asm
<pool_backwards_cpu>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x68,%rsp
  mov    %rdi,%r14
  mov    %rsi,%rbp
  mov    %ecx,%ebx
  mov    %r8d,%r13d
  mov    %r8d,0x10(%rsp)
  mov    %r9d,%r12d
  mov    0xa0(%rsp),%r15d
  mov    %r8d,%eax
  imul   %ecx,%eax
  mov    %eax,0x50(%rsp)
  mov    %edx,0x4c(%rsp)
  imul   %edx,%eax
  mov    %eax,%edx
  shl    $0x3,%edx
  mov    $0x0,%esi
  mov    0xb8(%rsp),%rdi
  call   <memset@plt>
  cmpl   $0x0,0x4c(%rsp)
  jle    L139
  mov    %r15d,%eax
  neg    %eax
  mov    %eax,0x48(%rsp)
  mov    %r13d,%eax
  imul   0xa8(%rsp),%r13d
  mov    %r13d,0x54(%rsp)
  movslq 0xb0(%rsp),%rdi
  mov    %rdi,0x18(%rsp)
  shl    $0x3,%rdi
  mov    %rdi,0x20(%rsp)
  movl   $0x0,0x3c(%rsp)
  movl   $0x0,0x34(%rsp)
  sub    %r12d,%ebx
  mov    %ebx,0x40(%rsp)
  mov    %eax,%r13d
  sub    %r15d,%r13d
  mov    %r13d,0x14(%rsp)
  mov    %r15d,%r13d
  add    %r15d,%eax
  mov    %eax,0x5c(%rsp)
  mov    %r13,%rax
  mov    %rbp,%r13
  mov    %rax,%rbp
  jmp    L26
L145:
  lea    (%rsi,%r9,1),%eax
  cltq
  add    %r10,%rax
  lea    (%r14,%rax,8),%rdx
  mov    %esi,%eax
  sub    %r15d,%eax
L55:
  movsd  (%rdx),%xmm1
  comisd %xmm0,%xmm1
  maxsd  %xmm0,%xmm1
  movapd %xmm1,%xmm0
  cmova  %eax,%ecx
  add    $0x8,%rdx
  add    $0x1,%eax
  cmp    %esi,%eax
  jne    L55
L85:
  add    $0x1,%edi
  add    0x10(%rsp),%esi
  cmp    %edi,%r12d
  je     L155
L75:
  test   %r15d,%r15d
  jg     L145
  jmp    L85
L155:
  add    $0x8,%r13
  movslq %ecx,%rcx
  mov    0xb8(%rsp),%rax
  lea    (%rax,%rcx,8),%rax
  movsd  (%rax),%xmm0
  addsd  -0x8(%r13),%xmm0
  movsd  %xmm0,(%rax)
  add    0xb0(%rsp),%ebx
  mov    0x18(%rsp),%rdi
  add    %rdi,0x8(%rsp)
  add    0x20(%rsp),%r11
  add    0xb0(%rsp),%r8d
  sub    0xb0(%rsp),%r9d
  cmp    0x14(%rsp),%ebx
  jg     L107
L140:
  mov    %r8d,%ecx
  mov    %r11,%rsi
  movsd  (%r11),%xmm0
  cmp    $0x1,%r15d
  jle    L151
  mov    $0x1,%eax
L70:
  lea    (%r8,%rax,1),%edx
  movsd  (%rsi,%rax,8),%xmm1
  comisd %xmm0,%xmm1
  maxsd  %xmm0,%xmm1
  movapd %xmm1,%xmm0
  cmova  %edx,%ecx
  add    $0x1,%rax
  cmp    %rbp,%rax
  jne    L70
L151:
  cmp    $0x1,%r12d
  jle    L155
  mov    0x30(%rsp),%eax
  lea    (%rax,%rbx,1),%esi
  mov    $0x1,%edi
  mov    0x8(%rsp),%r10
  add    0x28(%rsp),%r10
  jmp    L75
L107:
  mov    0xa8(%rsp),%ebx
  add    %ebx,0x38(%rsp)
  mov    0x38(%rsp),%eax
  mov    0x54(%rsp),%edi
  add    %edi,0x44(%rsp)
  cmp    0x40(%rsp),%eax
  jg     L103
L13:
  cmpl   $0x0,0x14(%rsp)
  js     L107
  mov    0x44(%rsp),%ebx
  movslq %ebx,%rax
  add    0x28(%rsp),%rax
  lea    (%r14,%rax,8),%r11
  mov    %ebx,%eax
  add    0x3c(%rsp),%ebx
  mov    %ebx,%r8d
  mov    0x48(%rsp),%r9d
  movq   $0x0,0x8(%rsp)
  mov    $0x0,%ebx
  mov    0x58(%rsp),%edi
  add    %eax,%edi
  mov    %edi,0x30(%rsp)
  jmp    L140
L103:
  addl   $0x1,0x34(%rsp)
  mov    0x34(%rsp),%eax
  mov    0x50(%rsp),%edi
  sub    %edi,0x48(%rsp)
  add    %edi,0x3c(%rsp)
  cmp    %eax,0x4c(%rsp)
  je     L139
L26:
  movl   $0x0,0x44(%rsp)
  movl   $0x0,0x38(%rsp)
  mov    0x3c(%rsp),%eax
  movslq %eax,%rbx
  mov    %rbx,0x28(%rsp)
  mov    0x5c(%rsp),%ebx
  add    %eax,%ebx
  mov    %ebx,0x58(%rsp)
  cmpl   $0x0,0x40(%rsp)
  jns    L13
  jmp    L103
L139:
  add    $0x68,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
void pool_backwards_cpu(const double *data_im, const double *data_pooled, const int channels, const int height, const int width, const int kernel_h, const int kernel_w, const int stride_h, const int stride_w, double *data_backgrad) {
  memset(data_backgrad, 0, height * width * channels * sizeof(double));
  const int channel_size = height * width;
  for (int channel = 0; channel < channels; channel++) {
    for (int fitting_height = 0; fitting_height <= (height - kernel_h); fitting_height += stride_h) {
      for (int fitting_width = 0; fitting_width <= (width - kernel_w); fitting_width += stride_w) {
        int max_index = fitting_height * width + fitting_width + channel_size * channel;
        double max_value = data_im[max_index];
        for (int kernel_col = 1; kernel_col < kernel_w; kernel_col++) {
          int input_row = fitting_height;
          int input_col = fitting_width + kernel_col;
          int data_index = input_row * width + input_col + channel_size * channel;
          double data_value = data_im[data_index];
          if (data_value > max_value) {
            max_index = data_index;
            max_value = data_value;
          }
        }
        for (int kernel_row = 1; kernel_row < kernel_h; kernel_row++) {
          for (int kernel_col = 0; kernel_col < kernel_w; kernel_col++) {
            int input_row = fitting_height + kernel_row;
            int input_col = fitting_width + kernel_col;
            int data_index = input_row * width + input_col + channel_size * channel;
            double data_value = data_im[data_index];
            if (data_value > max_value) {
              max_index = data_index;
              max_value = data_value;
            }
          }
        }
        data_backgrad[max_index] += *(data_pooled++);
      }
    }
  }
}
```