user: 请将以下的汇编代码转换成C语言代码:

```asm
<checkers>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r13
  push   %r12
  mov    %edi,-0x34(%rbp)
  mov    %esi,-0x38(%rbp)
  mov    %rdx,-0x40(%rbp)
  mov    %rcx,-0x48(%rbp)
  mov    %r8d,-0x4c(%rbp)
  mov    %r9,-0x58(%rbp)
  mov    -0x34(%rbp),%ecx
  movslq %ecx,%rax
  sub    $0x1,%rax
  mov    %rax,-0x20(%rbp)
  movslq %ecx,%rax
  mov    %rax,%r12
  mov    $0x0,%r13d
  mov    -0x34(%rbp),%eax
  movslq %eax,%rdx
  sub    $0x1,%rdx
  mov    %rdx,-0x18(%rbp)
  cltq
  mov    %rax,%r10
  mov    $0x0,%r11d
  mov    -0x4c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  cltd
  idivl  -0x34(%rbp)
  mov    %edx,-0x28(%rbp)
  mov    -0x4c(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  sub    -0x28(%rbp),%eax
  cltd
  idivl  -0x34(%rbp)
  cltd
  idivl  -0x38(%rbp)
  mov    %edx,-0x24(%rbp)
  cmpl   $0x0,-0x28(%rbp)
  jg     L123
  cmpl   $0x0,-0x24(%rbp)
  jg     L469
  mov    -0x24(%rbp),%eax
  add    $0x1,%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L556
  mov    $0x3,%eax
  jmp    L98
L556:
  mov    -0x24(%rbp),%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  add    $0x1,%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L440
  mov    $0x2,%eax
  jmp    L98
L469:
  mov    -0x38(%rbp),%eax
  sub    $0x1,%eax
  cmp    %eax,-0x24(%rbp)
  jl     L300
  mov    -0x24(%rbp),%eax
  sub    $0x1,%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L143
  mov    $0x1,%eax
  jmp    L98
L143:
  mov    -0x24(%rbp),%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  add    $0x1,%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L440
  mov    $0x2,%eax
  jmp    L98
L300:
  mov    -0x24(%rbp),%eax
  add    $0x1,%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L73
  mov    $0x3,%eax
  jmp    L98
L73:
  mov    -0x24(%rbp),%eax
  sub    $0x1,%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L222
  mov    $0x1,%eax
  jmp    L98
L222:
  mov    -0x24(%rbp),%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  add    $0x1,%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L440
  mov    $0x2,%eax
  jmp    L98
L123:
  mov    -0x34(%rbp),%eax
  sub    $0x1,%eax
  cmp    %eax,-0x28(%rbp)
  jl     L440
  cmpl   $0x0,-0x24(%rbp)
  jg     L246
  mov    -0x24(%rbp),%eax
  add    $0x1,%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L395
  mov    $0x3,%eax
  jmp    L98
L395:
  mov    -0x24(%rbp),%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  sub    $0x1,%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L440
  mov    $0x4,%eax
  jmp    L98
L246:
  mov    -0x38(%rbp),%eax
  sub    $0x1,%eax
  cmp    %eax,-0x24(%rbp)
  jl     L421
  mov    -0x24(%rbp),%eax
  sub    $0x1,%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L331
  mov    $0x1,%eax
  jmp    L98
L331:
  mov    -0x24(%rbp),%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  sub    $0x1,%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L440
  mov    $0x4,%eax
  jmp    L98
L421:
  mov    -0x24(%rbp),%eax
  add    $0x1,%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L500
  mov    $0x3,%eax
  jmp    L98
L500:
  mov    -0x24(%rbp),%eax
  sub    $0x1,%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L269
  mov    $0x1,%eax
  jmp    L98
L269:
  mov    -0x24(%rbp),%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  sub    $0x1,%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L440
  mov    $0x4,%eax
  jmp    L98
L440:
  cmpl   $0x0,-0x24(%rbp)
  jg     L392
  mov    -0x24(%rbp),%eax
  add    $0x1,%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L50
  mov    $0x3,%eax
  jmp    L98
L50:
  mov    -0x24(%rbp),%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  sub    $0x1,%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L83
  mov    $0x4,%eax
  jmp    L98
L83:
  mov    -0x24(%rbp),%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  add    $0x1,%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L553
  mov    $0x2,%eax
  jmp    L98
L392:
  mov    -0x38(%rbp),%eax
  sub    $0x1,%eax
  cmp    %eax,-0x24(%rbp)
  jl     L553
  mov    -0x24(%rbp),%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  sub    $0x1,%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L160
  mov    $0x4,%eax
  jmp    L98
L160:
  mov    -0x24(%rbp),%eax
  sub    $0x1,%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L142
  mov    $0x1,%eax
  jmp    L98
L142:
  mov    -0x24(%rbp),%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  add    $0x1,%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L553
  mov    $0x2,%eax
  jmp    L98
L553:
  mov    -0x24(%rbp),%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  sub    $0x1,%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L426
  mov    $0x4,%eax
  jmp    L98
L426:
  mov    -0x24(%rbp),%eax
  sub    $0x1,%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L241
  mov    $0x1,%eax
  jmp    L98
L241:
  mov    -0x24(%rbp),%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  add    $0x1,%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L510
  mov    $0x2,%eax
  jmp    L98
L510:
  mov    -0x24(%rbp),%eax
  add    $0x1,%eax
  movslq %eax,%rdx
  movslq %ecx,%rax
  imul   %rax,%rdx
  mov    -0x40(%rbp),%rax
  add    %rax,%rdx
  mov    -0x28(%rbp),%eax
  cltq
  movzbl (%rdx,%rax,1),%eax
  cmp    $0x78,%al
  jne    L293
  mov    $0x3,%eax
  jmp    L98
L293:
  mov    $0x0,%eax
L98:
  pop    %r12
  pop    %r13
  pop    %rbp
  ret
```

assistant: ```c
int checkers(int w, int h, char board[h][w], int stack[w * h], int tail, int done[h][w]) {
  int x = stack[tail] % w;
  int y = (stack[tail] - x) / w % h;
  if (x <= 0) {
    if (y <= 0) {
      if (board[y + 1][x] == 'x')
        return 3;
      else if (board[y][x + 1] == 'x')
        return 2;
    } else if (y >= h - 1) {
      if (board[y - 1][x] == 'x')
        return 1;
      else if (board[y][x + 1] == 'x')
        return 2;
    } else {
      if (board[y + 1][x] == 'x')
        return 3;
      else if (board[y - 1][x] == 'x')
        return 1;
      else if (board[y][x + 1] == 'x')
        return 2;
    }
  } else if (x >= w - 1) {
    if (y <= 0) {
      if (board[y + 1][x] == 'x')
        return 3;
      else if (board[y][x - 1] == 'x')
        return 4;
    } else if (y >= h - 1) {
      if (board[y - 1][x] == 'x')
        return 1;
      else if (board[y][x - 1] == 'x')
        return 4;
    } else {
      if (board[y + 1][x] == 'x')
        return 3;
      else if (board[y - 1][x] == 'x')
        return 1;
      else if (board[y][x - 1] == 'x')
        return 4;
    }
  }
  if (y <= 0) {
    if (board[y + 1][x] == 'x')
      return 3;
    else if (board[y][x - 1] == 'x')
      return 4;
    else if (board[y][x + 1] == 'x')
      return 2;
  } else if (y >= h - 1) {
    if (board[y][x - 1] == 'x')
      return 4;
    else if (board[y - 1][x] == 'x')
      return 1;
    else if (board[y][x + 1] == 'x')
      return 2;
  }
  if (board[y][x - 1] == 'x')
    return 4;
  else if (board[y - 1][x] == 'x')
    return 1;
  else if (board[y][x + 1] == 'x')
    return 2;
  else if (board[y + 1][x] == 'x')
    return 3;
  return 0;
}
```