user: 请将以下的汇编代码转换成C语言代码：

```asm
<step>:
  endbr64
  push   %r15
  mov    %r8d,%r10d
  mov    %ecx,%eax
  push   %r14
  sub    %edx,%r10d
  push   %r13
  push   %r12
  movslq %edx,%r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  sub    %esi,%eax
  cmovs  %r10d,%eax
  movslq %esi,%r10
  mov    0x68(%rsp),%ebx
  mov    0x60(%rsp),%r11d
  lea    (%rdi,%r10,8),%rbp
  mov    0x70(%rsp),%r14d
  mov    0x0(%rbp),%r10
  movzbl (%r10,%r12,1),%r10d
  cmp    %bl,%r10b
  je     L119
  lea    (%rcx,%r8,1),%eax
  test   $0x1,%al
  jne    L585
  test   %ecx,%ecx
  je     L409
  cmp    $0x7,%ecx
  je     L409
L305:
  cmp    %r9b,%r10b
  je     L571
L585:
  mov    $0xffffffff,%eax
L176:
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L409:
  movslq %ecx,%rbx
  movslq %r8d,%rax
  mov    (%rdi,%rbx,8),%rbx
  movzbl (%rbx,%rax,1),%eax
  cmp    %r11b,%al
  je     L585
  cmp    %r14b,%al
  je     L585
  cmp    %r9b,%r10b
  jne    L585
  jmp    L571
  nopw   0x0(%rax,%rax,1)
L119:
  cmp    $0x7,%ecx
  je     L208
  test   %ecx,%ecx
  je     L208
  lea    (%rcx,%r8,1),%r13d
  and    $0x1,%r13d
  jne    L585
  movslq %ecx,%r13
  lea    0x0(,%r13,8),%r15
  lea    (%rdi,%r15,1),%r13
  mov    %r15,0x8(%rsp)
  movslq %r8d,%r15
  mov    %r13,(%rsp)
  mov    0x0(%r13),%r13
  movzbl 0x0(%r13,%r15,1),%r13d
  cmp    %r11b,%r13b
  je     L342
  cmp    %r14b,%r13b
  je     L342
  nopw   0x0(%rax,%rax,1)
L593:
  sub    $0x8,%rsp
  movsbl %bl,%eax
  movsbl %r11b,%r9d
  push   %rax
  xor    %eax,%eax
  call   <restricaodama@plt>
  pop    %rdx
  pop    %rcx
  cmp    $0x2,%eax
  jne    L585
  mov    (%rsp),%rax
  mov    (%rax),%rax
  mov    %bl,(%rax,%r15,1)
  mov    0x0(%rbp),%rax
  movb   $0x2d,(%rax,%r12,1)
  mov    $0x1,%eax
  jmp    L176
  nopl   0x0(%rax)
L571:
  movslq %ecx,%rax
  movslq %r8d,%rbx
  shl    $0x3,%rax
  lea    (%rdi,%rax,1),%r13
  mov    0x0(%r13),%r14
  add    %rbx,%r14
  movzbl (%r14),%r10d
  cmp    %r9b,%r10b
  je     L585
  cmp    $0x42,%r9b
  sete   (%rsp)
  movzbl (%rsp),%r15d
  cmp    %esi,%ecx
  jle    L404
  test   %r15b,%r15b
  jne    L585
L404:
  cmp    $0x50,%r9b
  sete   0x8(%rsp)
  movzbl 0x8(%rsp),%r15d
  cmp    %esi,%ecx
  jge    L133
  test   %r15b,%r15b
  jne    L585
L133:
  lea    -0x1(%rcx),%r15d
  cmp    %esi,%r15d
  je     L394
  add    $0x1,%ecx
  cmp    %esi,%ecx
  jne    L585
L394:
  lea    0x1(%rdx),%ecx
  cmp    %r8d,%ecx
  je     L419
  lea    -0x1(%rdx),%esi
  cmp    %r8d,%esi
  je     L419
  cmp    %r11b,%r10b
  jne    L585
  mov    0x8(%rdi,%rax,1),%rax
  lea    -0x1(%rbx),%rcx
L212:
  add    %rcx,%rax
  cmpb   $0x2d,(%rax)
  jne    L585
  sub    $0x1,%edx
  cmp    %r8d,%edx
  jne    L585
  cmpb   $0x0,0x8(%rsp)
  je     L585
  movb   $0x50,(%rax)
L403:
  mov    0x0(%rbp),%rax
  movb   $0x2d,(%rax,%r12,1)
  mov    0x0(%r13),%rax
  movb   $0x2d,(%rax,%rbx,1)
  mov    $0x1,%eax
  jmp    L176
  nop
L208:
  movslq %ecx,%rax
  movslq %r8d,%r15
  lea    (%rdi,%rax,8),%rax
  mov    %rax,(%rsp)
  mov    (%rax),%rax
  movzbl (%rax,%r15,1),%eax
  cmp    %r14b,%al
  je     L585
  cmp    %r11b,%al
  je     L585
  lea    (%rcx,%r8,1),%eax
  test   $0x1,%al
  jne    L585
  jmp    L593
  nopl   0x0(%rax)
L342:
  cmp    %edx,%r8d
  jg     L172
  lea    -0x1(%r15),%r14
  mov    %r14,%r13
  mov    %r14,0x10(%rsp)
  mov    0x8(%rsp),%r14
  add    -0x8(%rdi,%r14,1),%r13
  cmpb   $0x2d,0x0(%r13)
  mov    %r13,0x18(%rsp)
  je     L435
L92:
  mov    0x8(%rsp),%r14
  mov    0x10(%rsp),%r13
  add    0x8(%rdi,%r14,1),%r13
  cmpb   $0x2d,0x0(%r13)
  mov    %r13,%r14
  jne    L305
  mov    %ecx,%r13d
  sub    %eax,%r13d
  add    %r8d,%eax
  movslq %r13d,%r13
  cltq
  mov    (%rdi,%r13,8),%r13
  cmp    %bl,0x0(%r13,%rax,1)
  jne    L305
L104:
  mov    %bl,(%r14)
L25:
  mov    0x0(%rbp),%rax
  movb   $0x2d,(%rax,%r12,1)
  mov    (%rsp),%rax
  mov    (%rax),%rax
  movb   $0x2d,(%rax,%r15,1)
  mov    $0x1,%eax
  jmp    L176
  nopl   0x0(%rax,%rax,1)
L172:
  lea    0x1(%r15),%r14
  mov    %r14,%r13
  mov    %r14,0x10(%rsp)
  mov    0x8(%rsp),%r14
  add    0x8(%rdi,%r14,1),%r13
  cmpb   $0x2d,0x0(%r13)
  mov    %r13,0x18(%rsp)
  je     L13
L354:
  mov    0x8(%rsp),%r14
  mov    0x10(%rsp),%r13
  add    -0x8(%rdi,%r14,1),%r13
  cmpb   $0x2d,0x0(%r13)
  mov    %r13,%r14
  jne    L305
  lea    (%rax,%rcx,1),%r13d
  movslq %r13d,%r13
  mov    %r13,0x8(%rsp)
  mov    %r8d,%r13d
  sub    %eax,%r13d
  movslq %r13d,%rax
  mov    0x8(%rsp),%r13
  mov    %rax,0x10(%rsp)
  mov    (%rdi,%r13,8),%rax
  mov    0x10(%rsp),%r13
  cmp    %bl,(%rax,%r13,1)
  jne    L305
  jmp    L104
  nopw   0x0(%rax,%rax,1)
L435:
  mov    %ecx,%r14d
  sub    %eax,%r14d
  movslq %r14d,%r13
  mov    %r8d,%r14d
  sub    %eax,%r14d
  mov    (%rdi,%r13,8),%r13
  movslq %r14d,%r14
  cmp    %bl,0x0(%r13,%r14,1)
  jne    L92
L512:
  mov    0x18(%rsp),%rax
  mov    %bl,(%rax)
  jmp    L25
  nopl   (%rax)
L13:
  mov    %ecx,%r14d
  sub    %eax,%r14d
  movslq %r14d,%r13
  mov    %r8d,%r14d
  sub    %eax,%r14d
  mov    (%rdi,%r13,8),%r13
  movslq %r14d,%r14
  cmp    %bl,0x0(%r13,%r14,1)
  jne    L354
  jmp    L512
  nopl   0x0(%rax,%rax,1)
L419:
  cmp    $0x2d,%r10b
  je     L447
  cmp    %r11b,%r10b
  jne    L585
  mov    -0x8(%rdi,%rax,1),%rsi
  lea    0x1(%rbx),%r9
  cmp    %r8d,%ecx
  sete   %r10b
  lea    (%rsi,%r9,1),%r11
  cmpb   $0x2d,(%r11)
  jne    L542
  test   %r10b,(%rsp)
  jne    L345
L542:
  lea    -0x1(%rbx),%rcx
  add    %rcx,%rsi
  cmpb   $0x2d,(%rsi)
  je     L384
L370:
  mov    0x8(%rdi,%rax,1),%rax
  add    %rax,%r9
  cmpb   $0x2d,(%r9)
  jne    L212
  test   %r10b,0x8(%rsp)
  je     L212
  movb   $0x50,(%r9)
  jmp    L403
  nopl   0x0(%rax)
L447:
  mov    %r9b,(%r14)
  mov    0x0(%rbp),%rax
  movb   $0x2d,(%rax,%r12,1)
  mov    $0x1,%eax
  jmp    L176
L384:
  lea    -0x1(%rdx),%r11d
  cmp    %r8d,%r11d
  jne    L370
  cmpb   $0x0,(%rsp)
  je     L370
  movb   $0x42,(%rsi)
  jmp    L403
L345:
  movb   $0x42,(%r11)
  jmp    L403
```

assistant: ```c
int step(char **matriz, int lin, int col, int linp, int colp, char jogador, char oposto, char dama, char odama) {
  int num = 0;
  num = (linp - lin < 0) ? (colp - col) : (linp - lin);
  if (matriz[lin][col] == dama) {
    if ((linp == 7 || linp == 0) && (matriz[linp][colp] == oposto || matriz[linp][colp] == odama))
      return -1;
    if ((linp + colp) % 2 == 0) {
      if (matriz[linp][colp] == oposto || matriz[linp][colp] == odama) {
        if (colp > col) {
          if (matriz[linp + 1][colp + 1] == '-' && matriz[linp - num][colp - num] == matriz[lin][col]) {
            matriz[linp + 1][colp + 1] = dama;
            matriz[lin][col] = '-';
            matriz[linp][colp] = '-';
            return 1;
          }
          if (matriz[linp - 1][colp + 1] == '-' && matriz[linp + num][colp - num] == matriz[lin][col]) {
            matriz[linp - 1][colp + 1] = dama;
            matriz[lin][col] = '-';
            matriz[linp][colp] = '-';
            return 1;
          }
        } else {
          if (matriz[linp - 1][colp - 1] == '-' && matriz[linp - num][colp - num] == matriz[lin][col]) {
            matriz[linp - 1][colp - 1] = dama;
            matriz[lin][col] = '-';
            matriz[linp][colp] = '-';
            return 1;
          }
          if (matriz[linp + 1][colp - 1] == '-' && matriz[linp - num][colp + num] == matriz[lin][col]) {
            matriz[linp + 1][colp - 1] = dama;
            matriz[lin][col] = '-';
            matriz[linp][colp] = '-';
            return 1;
          }
        }
      } else if (restricaodama(matriz, lin, col, linp, colp, oposto, dama) == 2) {
        matriz[linp][colp] = dama;
        matriz[lin][col] = '-';
        return 1;
      } else
        return -1;
    }
  }
  if ((linp + colp) % 2 == 0) {
    if ((linp == 7 || linp == 0) && (matriz[linp][colp] == oposto || matriz[linp][colp] == odama))
      return -1;
    if (matriz[lin][col] == jogador && matriz[linp][colp] == jogador)
      return -1;
    if ((jogador == 'B' && linp > lin) || (jogador == 'P' && linp < lin))
      return -1;
    if ((matriz[lin][col] == jogador && linp - 1 == lin) || (matriz[lin][col] == jogador && linp + 1 == lin)) {
      if (colp == col + 1 || colp == col - 1) {
        if (matriz[linp][colp] == '-') {
          matriz[linp][colp] = jogador;
          matriz[lin][col] = '-';
          return 1;
        }
      }
      if (matriz[linp][colp] == oposto) {
        if (matriz[linp - 1][colp + 1] == '-' && colp + 1 == col + 2 && jogador == 'B') {
          matriz[linp - 1][colp + 1] = jogador;
          matriz[lin][col] = '-';
          matriz[linp][colp] = '-';
          return 1;
        }
        if (matriz[linp - 1][colp - 1] == '-' && colp - 1 == col - 2 && jogador == 'B') {
          matriz[linp - 1][colp - 1] = jogador;
          matriz[lin][col] = '-';
          matriz[linp][colp] = '-';
          return 1;
        }
        if (matriz[linp + 1][colp + 1] == '-' && colp + 1 == col + 2 && jogador == 'P') {
          matriz[linp + 1][colp + 1] = jogador;
          matriz[lin][col] = '-';
          matriz[linp][colp] = '-';
          return 1;
        }
        if (matriz[linp + 1][colp - 1] == '-' && colp - 1 == col - 2 && jogador == 'P') {
          matriz[linp + 1][colp - 1] = jogador;
          matriz[lin][col] = '-';
          matriz[linp][colp] = '-';
          return 1;
        }
      }
    }
  }
  return -1;
}
```