user: 请将这段汇编代码片段转换成等效的C代码:

```asm
<recu>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x60,%rsp
  mov    %rdi,-0x58(%rbp)
  mov    %esi,-0x5c(%rbp)
  mov    %edx,-0x60(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x0,-0x50(%rbp)
  jmp    L91
L69:
  mov    -0x50(%rbp),%eax
  lea    0x1(%rax),%edx
  mov    -0x50(%rbp),%eax
  cltq
  mov    %edx,-0x30(%rbp,%rax,4)
  addl   $0x1,-0x50(%rbp)
L91:
  cmpl   $0x8,-0x50(%rbp)
  jle    L69
  movl   $0x0,-0x50(%rbp)
  jmp    L172
L210:
  movl   $0x0,-0x4c(%rbp)
  jmp    L86
L73:
  mov    -0x5c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x50(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x4c(%rbp),%eax
  cltq
  mov    -0x30(%rbp,%rax,4),%eax
  cmp    %eax,%edx
  jne    L11
  mov    -0x4c(%rbp),%eax
  cltq
  movl   $0xffffffff,-0x30(%rbp,%rax,4)
  jmp    L154
L11:
  mov    -0x50(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x60(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x4c(%rbp),%eax
  cltq
  mov    -0x30(%rbp,%rax,4),%eax
  cmp    %eax,%edx
  jne    L154
  mov    -0x4c(%rbp),%eax
  cltq
  movl   $0xffffffff,-0x30(%rbp,%rax,4)
L154:
  addl   $0x1,-0x4c(%rbp)
L86:
  cmpl   $0x8,-0x4c(%rbp)
  jle    L73
  addl   $0x1,-0x50(%rbp)
L172:
  cmpl   $0x8,-0x50(%rbp)
  jle    L210
  mov    -0x5c(%rbp),%eax
  movslq %eax,%rdx
  imul   $0x55555556,%rdx,%rdx
  shr    $0x20,%rdx
  mov    %eax,%esi
  sar    $0x1f,%esi
  mov    %edx,%ecx
  sub    %esi,%ecx
  mov    %ecx,%edx
  add    %edx,%edx
  add    %ecx,%edx
  sub    %edx,%eax
  mov    %eax,%ecx
  mov    -0x5c(%rbp),%eax
  sub    %ecx,%eax
  movslq %eax,%rdx
  imul   $0x55555556,%rdx,%rdx
  shr    $0x20,%rdx
  sar    $0x1f,%eax
  sub    %eax,%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  mov    %eax,-0x48(%rbp)
  mov    -0x48(%rbp),%eax
  add    $0x3,%eax
  mov    %eax,-0x44(%rbp)
  mov    -0x60(%rbp),%eax
  movslq %eax,%rdx
  imul   $0x55555556,%rdx,%rdx
  shr    $0x20,%rdx
  mov    %eax,%esi
  sar    $0x1f,%esi
  mov    %edx,%ecx
  sub    %esi,%ecx
  mov    %ecx,%edx
  add    %edx,%edx
  add    %ecx,%edx
  sub    %edx,%eax
  mov    %eax,%ecx
  mov    -0x60(%rbp),%eax
  sub    %ecx,%eax
  movslq %eax,%rdx
  imul   $0x55555556,%rdx,%rdx
  shr    $0x20,%rdx
  sar    $0x1f,%eax
  sub    %eax,%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  mov    %eax,-0x40(%rbp)
  mov    -0x40(%rbp),%eax
  add    $0x3,%eax
  mov    %eax,-0x3c(%rbp)
  jmp    L60
L135:
  mov    -0x40(%rbp),%eax
  mov    %eax,-0x4c(%rbp)
  jmp    L173
L216:
  movl   $0x0,-0x50(%rbp)
  jmp    L161
L55:
  mov    -0x48(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x4c(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x50(%rbp),%eax
  cltq
  mov    -0x30(%rbp,%rax,4),%eax
  cmp    %eax,%edx
  jne    L2
  mov    -0x50(%rbp),%eax
  cltq
  movl   $0xffffffff,-0x30(%rbp,%rax,4)
L2:
  addl   $0x1,-0x50(%rbp)
L161:
  cmpl   $0x8,-0x50(%rbp)
  jle    L55
  addl   $0x1,-0x4c(%rbp)
L173:
  mov    -0x4c(%rbp),%eax
  cmp    -0x3c(%rbp),%eax
  jl     L216
  addl   $0x1,-0x48(%rbp)
L60:
  mov    -0x48(%rbp),%eax
  cmp    -0x44(%rbp),%eax
  jl     L135
  movl   $0x0,-0x50(%rbp)
  jmp    L137
L57:
  mov    -0x50(%rbp),%eax
  cltq
  mov    -0x30(%rbp,%rax,4),%eax
  cmp    $0xffffffff,%eax
  je     L102
  mov    -0x58(%rbp),%rax
  mov    %rax,%rdi
  call   <copy@plt>
  mov    %rax,-0x38(%rbp)
  mov    -0x5c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x60(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rax,%rdx
  mov    -0x50(%rbp),%eax
  cltq
  mov    -0x30(%rbp,%rax,4),%eax
  mov    %eax,(%rdx)
  mov    -0x38(%rbp),%rax
  mov    %rax,%rdi
  call   <solve@plt>
  mov    %rax,-0x38(%rbp)
  cmpq   $0x0,-0x38(%rbp)
  je     L30
  mov    -0x38(%rbp),%rax
  jmp    L212
L102:
  nop
L30:
  addl   $0x1,-0x50(%rbp)
L137:
  cmpl   $0x8,-0x50(%rbp)
  jle    L57
  mov    $0x0,%eax
L212:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L168
  call   <__stack_chk_fail@plt>
L168:
  leave
  ret
```

assistant: ```c
int **recu(int **a, int ci, int cj) {
  int i, j, istart, iend, jstart, jend, table[9];
  for (i = 0; i < 9; i++)
    table[i] = i + 1;
  for (i = 0; i < 9; i++)
    for (j = 0; j < 9; j++)
      if (a[ci][i] == table[j])
        table[j] = -1;
      else if (a[i][cj] == table[j])
        table[j] = -1;
  istart = ((ci - (ci % 3)) / 3) * 3;
  iend = istart + 3;
  jstart = ((cj - cj % 3) / 3) * 3;
  jend = jstart + 3;
  for (; istart < iend; istart++) {
    for (j = jstart; j < jend; j++)
      for (i = 0; i < 9; i++) {
        if (a[istart][j] == table[i])
          table[i] = -1;
      }
  }
  int **m;
  for (i = 0; i < 9; i++) {
    if (table[i] == -1)
      continue;
    m = copy(a);
    m[ci][cj] = table[i];
    m = solve(m);
    if (m != NULL)
      return m;
  }
  return NULL;
}
```