user: 下面的汇编指令对应的C源代码是什么：

```asm
<findBlock>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  movl   $0x0,-0x8(%rbp)
  movl   $0x0,-0x4(%rbp)
  jmp    L53
L65:
  mov    -0x4(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x78,%al
  jne    L308
  addl   $0x1,-0x8(%rbp)
L308:
  mov    -0x4(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  cltq
  lea    0x1(%rax),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x78,%al
  jne    L20
  addl   $0x1,-0x8(%rbp)
L20:
  mov    -0x4(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  cltq
  lea    0x2(%rax),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x78,%al
  jne    L132
  addl   $0x1,-0x8(%rbp)
L132:
  cmpl   $0x2,-0x8(%rbp)
  jne    L98
  mov    -0x4(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L99
  mov    -0x4(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  jmp    L198
L99:
  mov    -0x4(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  cltq
  lea    0x1(%rax),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L42
  mov    -0x4(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  add    $0x1,%eax
  jmp    L198
L42:
  mov    -0x4(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  cltq
  lea    0x2(%rax),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L98
  mov    -0x4(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  add    $0x2,%eax
  jmp    L198
L98:
  movl   $0x0,-0x8(%rbp)
  addl   $0x1,-0x4(%rbp)
L53:
  cmpl   $0x2,-0x4(%rbp)
  jle    L65
  movl   $0x0,-0x4(%rbp)
  jmp    L103
L39:
  mov    -0x4(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x78,%al
  jne    L332
  addl   $0x1,-0x8(%rbp)
L332:
  mov    -0x4(%rbp),%eax
  add    $0x3,%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x78,%al
  jne    L268
  addl   $0x1,-0x8(%rbp)
L268:
  mov    -0x4(%rbp),%eax
  add    $0x6,%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x78,%al
  jne    L338
  addl   $0x1,-0x8(%rbp)
L338:
  cmpl   $0x2,-0x8(%rbp)
  jne    L155
  mov    -0x4(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L220
  mov    -0x4(%rbp),%eax
  jmp    L198
L220:
  mov    -0x4(%rbp),%eax
  add    $0x3,%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L399
  mov    -0x4(%rbp),%eax
  add    $0x3,%eax
  jmp    L198
L399:
  mov    -0x4(%rbp),%eax
  add    $0x6,%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L155
  mov    -0x4(%rbp),%eax
  add    $0x6,%eax
  jmp    L198
L155:
  movl   $0x0,-0x8(%rbp)
  addl   $0x1,-0x4(%rbp)
L103:
  cmpl   $0x2,-0x4(%rbp)
  jle    L39
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x78,%al
  jne    L327
  addl   $0x1,-0x8(%rbp)
L327:
  mov    -0x18(%rbp),%rax
  add    $0x4,%rax
  movzbl (%rax),%eax
  cmp    $0x78,%al
  jne    L47
  addl   $0x1,-0x8(%rbp)
L47:
  mov    -0x18(%rbp),%rax
  add    $0x8,%rax
  movzbl (%rax),%eax
  cmp    $0x78,%al
  jne    L412
  addl   $0x1,-0x8(%rbp)
L412:
  cmpl   $0x2,-0x8(%rbp)
  jne    L158
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L420
  mov    $0x0,%eax
  jmp    L198
L420:
  mov    -0x18(%rbp),%rax
  add    $0x4,%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L352
  mov    $0x4,%eax
  jmp    L198
L352:
  mov    -0x18(%rbp),%rax
  add    $0x8,%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L158
  mov    $0x8,%eax
  jmp    L198
L158:
  movl   $0x0,-0x8(%rbp)
  mov    -0x18(%rbp),%rax
  add    $0x2,%rax
  movzbl (%rax),%eax
  cmp    $0x78,%al
  jne    L78
  addl   $0x1,-0x8(%rbp)
L78:
  mov    -0x18(%rbp),%rax
  add    $0x4,%rax
  movzbl (%rax),%eax
  cmp    $0x78,%al
  jne    L110
  addl   $0x1,-0x8(%rbp)
L110:
  mov    -0x18(%rbp),%rax
  add    $0x6,%rax
  movzbl (%rax),%eax
  cmp    $0x78,%al
  jne    L62
  addl   $0x1,-0x8(%rbp)
L62:
  cmpl   $0x2,-0x8(%rbp)
  jne    L234
  mov    -0x18(%rbp),%rax
  add    $0x2,%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L433
  mov    $0x2,%eax
  jmp    L198
L433:
  mov    -0x18(%rbp),%rax
  add    $0x4,%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L325
  mov    $0x4,%eax
  jmp    L198
L325:
  mov    -0x18(%rbp),%rax
  add    $0x6,%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L234
  mov    $0x6,%eax
  jmp    L198
L234:
  mov    $0xffffffff,%eax
L198:
  pop    %rbp
  ret
```

assistant: ```c
int findBlock(char *playground) {
  int count = 0;
  int p;
  for (p = 0; p < 3; p++) {
    if (playground[p * 3 + 0] == 'x')
      count += 1;
    if (playground[p * 3 + 1] == 'x')
      count += 1;
    if (playground[p * 3 + 2] == 'x')
      count += 1;
    if (count == 2) {
      if (playground[p * 3 + 0] == ' ')
        return p * 3 + 0;
      if (playground[p * 3 + 1] == ' ')
        return p * 3 + 1;
      if (playground[p * 3 + 2] == ' ')
        return p * 3 + 2;
    }
    count = 0;
  }
  for (p = 0; p < 3; p++) {
    if (playground[3 * 0 + p] == 'x')
      count += 1;
    if (playground[3 * 1 + p] == 'x')
      count += 1;
    if (playground[3 * 2 + p] == 'x')
      count += 1;
    if (count == 2) {
      if (playground[3 * 0 + p] == ' ')
        return 3 * 0 + p;
      if (playground[3 * 1 + p] == ' ')
        return 3 * 1 + p;
      if (playground[3 * 2 + p] == ' ')
        return 3 * 2 + p;
    }
    count = 0;
  }
  if (playground[3 * 0 + 0] == 'x')
    count += 1;
  if (playground[3 * 1 + 1] == 'x')
    count += 1;
  if (playground[3 * 2 + 2] == 'x')
    count += 1;
  if (count == 2) {
    if (playground[3 * 0 + 0] == ' ')
      return 3 * 0 + 0;
    if (playground[3 * 1 + 1] == ' ')
      return 3 * 1 + 1;
    if (playground[3 * 2 + 2] == ' ')
      return 3 * 2 + 2;
  }
  count = 0;
  if (playground[3 * 0 + 2] == 'x')
    count += 1;
  if (playground[3 * 1 + 1] == 'x')
    count += 1;
  if (playground[3 * 2 + 0] == 'x')
    count += 1;
  if (count == 2) {
    if (playground[3 * 0 + 2] == ' ')
      return 3 * 0 + 2;
    if (playground[3 * 1 + 1] == ' ')
      return 3 * 1 + 1;
    if (playground[3 * 2 + 0] == ' ')
      return 3 * 2 + 0;
  }
  return -1;
}
```