user: What would the C source look like for the assembly code provided here:

```asm
<dehdif>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x38(%rbp)
  mov    %esi,-0x3c(%rbp)
  mov    %edx,-0x40(%rbp)
  mov    %ecx,-0x44(%rbp)
  mov    -0x3c(%rbp),%eax
  imul   -0x40(%rbp),%eax
  mov    %eax,-0x1c(%rbp)
  mov    -0x3c(%rbp),%eax
  sub    $0x1,%eax
  mov    %eax,-0x18(%rbp)
  movl   $0x0,-0x14(%rbp)
  cmpl   $0x8,-0x44(%rbp)
  jne    L35
  mov    -0x38(%rbp),%rax
  mov    %rax,-0x8(%rbp)
  movl   $0x0,-0x2c(%rbp)
  jmp    L86
L57:
  movl   $0x0,-0x28(%rbp)
  jmp    L9
L38:
  mov    -0x14(%rbp),%eax
  imul   -0x1c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x2c(%rbp),%eax
  add    $0x1,%eax
  imul   -0x40(%rbp),%eax
  add    %eax,%edx
  mov    -0x28(%rbp),%eax
  add    %edx,%eax
  movslq %eax,%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  mov    %eax,%ecx
  mov    -0x14(%rbp),%eax
  imul   -0x1c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x2c(%rbp),%eax
  imul   -0x40(%rbp),%eax
  add    %eax,%edx
  mov    -0x28(%rbp),%eax
  add    %edx,%eax
  movslq %eax,%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  add    %eax,%ecx
  mov    -0x14(%rbp),%eax
  imul   -0x1c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x2c(%rbp),%eax
  add    $0x1,%eax
  imul   -0x40(%rbp),%eax
  add    %eax,%edx
  mov    -0x28(%rbp),%eax
  add    %edx,%eax
  movslq %eax,%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    %ecx,%edx
  mov    %dl,(%rax)
  addl   $0x1,-0x28(%rbp)
L9:
  mov    -0x28(%rbp),%eax
  cmp    -0x40(%rbp),%eax
  jl     L38
  addl   $0x1,-0x2c(%rbp)
L86:
  mov    -0x2c(%rbp),%eax
  cmp    -0x18(%rbp),%eax
  jl     L57
  jmp    L34
L35:
  cmpl   $0x10,-0x44(%rbp)
  jne    L34
  mov    -0x38(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  movl   $0x0,-0x24(%rbp)
  jmp    L22
L76:
  movl   $0x0,-0x20(%rbp)
  jmp    L93
L74:
  mov    -0x14(%rbp),%eax
  imul   -0x1c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x24(%rbp),%eax
  add    $0x1,%eax
  imul   -0x40(%rbp),%eax
  add    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    (%rax,%rax,1),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movzwl (%rax),%eax
  mov    %eax,%ecx
  mov    -0x14(%rbp),%eax
  imul   -0x1c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x24(%rbp),%eax
  imul   -0x40(%rbp),%eax
  add    %eax,%edx
  mov    -0x20(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    (%rax,%rax,1),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  movzwl (%rax),%eax
  lea    (%rcx,%rax,1),%edx
  mov    -0x14(%rbp),%eax
  imul   -0x1c(%rbp),%eax
  mov    %eax,%ecx
  mov    -0x24(%rbp),%eax
  add    $0x1,%eax
  imul   -0x40(%rbp),%eax
  add    %eax,%ecx
  mov    -0x20(%rbp),%eax
  add    %ecx,%eax
  cltq
  lea    (%rax,%rax,1),%rcx
  mov    -0x10(%rbp),%rax
  add    %rcx,%rax
  mov    %dx,(%rax)
  addl   $0x1,-0x20(%rbp)
L93:
  mov    -0x20(%rbp),%eax
  cmp    -0x40(%rbp),%eax
  jl     L74
  addl   $0x1,-0x24(%rbp)
L22:
  mov    -0x24(%rbp),%eax
  cmp    -0x18(%rbp),%eax
  jl     L76
L34:
  nop
  pop    %rbp
  ret
```

assistant: ```c
void dehdif(void *p, int n, int c, int b) {
  const int s = n * c;
  const int m = n - 1;
  const int i = 0;
  if (b == 8) {
    char *q = (char *)p;
    for (int j = 0; j < m; ++j)
      for (int k = 0; k < c; ++k)
        q[i * s + (j + 1) * c + k] += q[i * s + j * c + k];
  } else if (b == 16) {
    short *q = (short *)p;
    for (int j = 0; j < m; ++j)
      for (int k = 0; k < c; ++k)
        q[i * s + (j + 1) * c + k] += q[i * s + j * c + k];
  } else if (b == 32) {
  }
}
```