user: 请从给定的汇编指令推导出C源代码：

```asm
<check_pos>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  mov    %esi,-0x1c(%rbp)
  mov    %edx,-0x20(%rbp)
  mov    %ecx,-0x24(%rbp)
  movl   $0x0,-0xc(%rbp)
  movl   $0x0,-0x8(%rbp)
  movl   $0x0,-0x4(%rbp)
  movl   $0x0,-0xc(%rbp)
  jmp    L16
L44:
  mov    -0x20(%rbp),%eax
  mov    %eax,-0x8(%rbp)
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x8(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cmp    $0x14,%eax
  jne    L196
  movl   $0xa,-0x4(%rbp)
L196:
  addl   $0x1,-0xc(%rbp)
L16:
  mov    -0xc(%rbp),%eax
  cmp    -0x24(%rbp),%eax
  jl     L44
  movl   $0x0,-0x8(%rbp)
  jmp    L168
L81:
  mov    -0x1c(%rbp),%eax
  mov    %eax,-0xc(%rbp)
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x8(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cmp    $0x14,%eax
  jne    L79
  movl   $0xa,-0x4(%rbp)
L79:
  addl   $0x1,-0x8(%rbp)
L168:
  mov    -0x8(%rbp),%eax
  cmp    -0x24(%rbp),%eax
  jl     L81
  mov    -0x1c(%rbp),%eax
  mov    %eax,-0xc(%rbp)
  mov    -0x20(%rbp),%eax
  mov    %eax,-0x8(%rbp)
  jmp    L50
L185:
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x8(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cmp    $0x14,%eax
  jne    L1
  movl   $0xa,-0x4(%rbp)
L1:
  addl   $0x1,-0xc(%rbp)
  addl   $0x1,-0x8(%rbp)
L50:
  mov    -0xc(%rbp),%eax
  cmp    -0x24(%rbp),%eax
  jge    L61
  mov    -0x8(%rbp),%eax
  cmp    -0x24(%rbp),%eax
  jl     L185
L61:
  mov    -0x1c(%rbp),%eax
  mov    %eax,-0xc(%rbp)
  mov    -0x20(%rbp),%eax
  mov    %eax,-0x8(%rbp)
  jmp    L215
L103:
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x8(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cmp    $0x14,%eax
  jne    L169
  movl   $0xa,-0x4(%rbp)
L169:
  subl   $0x1,-0xc(%rbp)
  subl   $0x1,-0x8(%rbp)
L215:
  cmpl   $0x0,-0xc(%rbp)
  js     L84
  cmpl   $0x0,-0x8(%rbp)
  jns    L103
L84:
  mov    -0x1c(%rbp),%eax
  mov    %eax,-0xc(%rbp)
  mov    -0x20(%rbp),%eax
  mov    %eax,-0x8(%rbp)
  jmp    L142
L151:
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x8(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cmp    $0x14,%eax
  jne    L157
  movl   $0xa,-0x4(%rbp)
L157:
  addl   $0x1,-0xc(%rbp)
  subl   $0x1,-0x8(%rbp)
L142:
  mov    -0xc(%rbp),%eax
  cmp    -0x24(%rbp),%eax
  jge    L87
  cmpl   $0x0,-0x8(%rbp)
  jns    L151
L87:
  mov    -0x1c(%rbp),%eax
  mov    %eax,-0xc(%rbp)
  mov    -0x20(%rbp),%eax
  mov    %eax,-0x8(%rbp)
  jmp    L115
L219:
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x8(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cmp    $0x14,%eax
  jne    L170
  movl   $0xa,-0x4(%rbp)
L170:
  subl   $0x1,-0xc(%rbp)
  addl   $0x1,-0x8(%rbp)
L115:
  cmpl   $0x0,-0xc(%rbp)
  js     L172
  mov    -0x8(%rbp),%eax
  cmp    -0x24(%rbp),%eax
  jl     L219
L172:
  mov    -0x4(%rbp),%eax
  pop    %rbp
  ret
```

assistant: ```c
int check_pos(int **board, int x, int y, int q) {
  int i = 0, j = 0;
  int flag = 0;
  for (i = 0; i < q; i++) {
    j = y;
    if (board[i][j] == 20) {
      flag = 10;
    }
  }
  for (j = 0; j < q; j++) {
    i = x;
    if (board[i][j] == 20) {
      flag = 10;
    }
  }
  for (i = x, j = y; i < q && j < q; i++, j++) {
    if (board[i][j] == 20) {
      flag = 10;
    }
  }
  for (i = x, j = y; i >= 0 && j >= 0; i--, j--) {
    if (board[i][j] == 20) {
      flag = 10;
    }
  }
  for (i = x, j = y; i < q && j >= 0; i++, j--) {
    if (board[i][j] == 20) {
      flag = 10;
    }
  }
  for (i = x, j = y; i >= 0 && j < q; i--, j++) {
    if (board[i][j] == 20) {
      flag = 10;
    }
  }
  return flag;
}
```