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

```asm
<compute_BPdifferences>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %edx,-0x44(%rbp)
  mov    -0x38(%rbp),%rax
  movzwl (%rax),%eax
  cwtl
  mov    %eax,-0x1c(%rbp)
  mov    -0x1c(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    -0x1c(%rbp),%eax
  add    $0x2,%eax
  imul   %edx,%eax
  shr    %eax
  mov    %eax,-0x18(%rbp)
  mov    -0x18(%rbp),%eax
  shl    $0x2,%eax
  mov    %eax,%edi
  call   <space@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x1c(%rbp),%eax
  mov    %eax,%edi
  call   <get_iindx@plt>
  mov    %rax,-0x8(%rbp)
  mov    -0x1c(%rbp),%eax
  sub    -0x44(%rbp),%eax
  sub    $0x1,%eax
  mov    %eax,-0x28(%rbp)
  jmp    L74
L47:
  movl   $0x0,-0x20(%rbp)
  mov    -0x28(%rbp),%edx
  mov    -0x44(%rbp),%eax
  add    %edx,%eax
  add    $0x1,%eax
  mov    %eax,-0x24(%rbp)
  jmp    L14
L39:
  mov    -0x28(%rbp),%eax
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  sub    -0x24(%rbp),%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x14(%rbp),%eax
  add    $0x1,%eax
  mov    %eax,%eax
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0x20(%rbp)
  mov    -0x24(%rbp),%eax
  lea    (%rax,%rax,1),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movzwl (%rax),%edx
  mov    -0x24(%rbp),%eax
  lea    (%rax,%rax,1),%rcx
  mov    -0x40(%rbp),%rax
  add    %rcx,%rax
  movzwl (%rax),%eax
  cmp    %ax,%dx
  je     L5
  mov    -0x24(%rbp),%eax
  lea    (%rax,%rax,1),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movzwl (%rax),%eax
  cwtl
  cmp    %eax,-0x28(%rbp)
  ja     L9
  mov    -0x24(%rbp),%eax
  lea    (%rax,%rax,1),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movzwl (%rax),%eax
  cwtl
  cmp    %eax,-0x24(%rbp)
  jbe    L9
  addl   $0x1,-0x20(%rbp)
L9:
  mov    -0x24(%rbp),%eax
  lea    (%rax,%rax,1),%rdx
  mov    -0x40(%rbp),%rax
  add    %rdx,%rax
  movzwl (%rax),%eax
  cwtl
  cmp    %eax,-0x28(%rbp)
  ja     L5
  mov    -0x24(%rbp),%eax
  lea    (%rax,%rax,1),%rdx
  mov    -0x40(%rbp),%rax
  add    %rdx,%rax
  movzwl (%rax),%eax
  cwtl
  cmp    %eax,-0x24(%rbp)
  jbe    L5
  addl   $0x1,-0x20(%rbp)
L5:
  mov    -0x14(%rbp),%eax
  lea    0x0(,%rax,4),%rdx
  mov    -0x10(%rbp),%rax
  add    %rax,%rdx
  mov    -0x20(%rbp),%eax
  mov    %eax,(%rdx)
  addl   $0x1,-0x24(%rbp)
L14:
  mov    -0x24(%rbp),%eax
  cmp    -0x1c(%rbp),%eax
  jbe    L39
  subl   $0x1,-0x28(%rbp)
L74:
  cmpl   $0x0,-0x28(%rbp)
  jne    L47
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x10(%rbp),%rax
  leave
  ret
```

assistant: ```c
unsigned int *compute_BPdifferences(short *pt1, short *pt2, unsigned int turn) {
  unsigned int *array;
  unsigned int n, size, i, j, ij, d;
  n = (unsigned int)pt1[0];
  size = ((n + 1) * (n + 2)) / 2;
  array = (unsigned int *)space(sizeof(unsigned int) * size);
  int *iindx = get_iindx(n);
  for (i = n - turn - 1; i >= 1; i--) {
    d = 0;
    for (j = i + turn + 1; j <= n; j++) {
      ij = iindx[i] - j;
      d = array[ij + 1];
      if (pt1[j] != pt2[j]) {
        if (i <= (unsigned int)pt1[j] && (unsigned int)pt1[j] < j) {
          d++;
        }
        if (i <= (unsigned int)pt2[j] && (unsigned int)pt2[j] < j) {
          d++;
        }
      }
      array[ij] = d;
    }
  }
  free(iindx);
  return array;
}
```