user: 请从给定的汇编指令推导出C源代码:

```asm
<recu>:
  endbr64
  push   %r15
  mov    $0x4,%r8d
  lea    0x48(%rdi),%r15
  mov    $0x3,%r9d
  push   %r14
  mov    %rdi,%r14
  mov    $0x2,%r10d
  mov    $0x1,%r11d
  push   %r13
  push   %r12
  mov    %rdi,%r12
  push   %rbp
  mov    $0x9,%ebp
  push   %rbx
  sub    $0x88,%rsp
  mov    %esi,0x28(%rsp)
  mov    %edx,0x2c(%rsp)
  mov    %fs:0x28,%rax
  mov    %rax,0x78(%rsp)
  xor    %eax,%eax
  movslq %esi,%rax
  movb   $0x0,0x10(%rsp)
  mov    $0x6,%esi
  lea    0x0(,%rax,8),%rcx
  mov    (%rdi,%rax,8),%r13
  mov    %rax,0x30(%rsp)
  xor    %eax,%eax
  mov    %rcx,0x48(%rsp)
  movslq %edx,%rcx
  mov    $0x5,%edi
  mov    $0x8,%edx
  mov    %rcx,0x38(%rsp)
  lea    0x0(,%rcx,4),%rbx
  mov    $0x7,%ecx
  movb   $0x0,0x18(%rsp)
  movb   $0x0,0x23(%rsp)
  movb   $0x0,0x24(%rsp)
  movb   $0x0,0x26(%rsp)
  movb   $0x0,0x25(%rsp)
  movb   $0x0,0x8(%rsp)
  movb   $0x0,(%rsp)
  mov    %r14,0x40(%rsp)
  mov    %al,0x27(%rsp)
  jmp    L352
  nopl   0x0(%rax,%rax,1)
L126:
  mov    (%r12),%r14
  cmp    (%r14,%rbx,1),%r11d
  je     L121
  cmp    %eax,%r10d
  je     L102
L195:
  mov    (%r12),%r14
  cmp    (%r14,%rbx,1),%r10d
  je     L102
  cmp    %eax,%r9d
  je     L105
L184:
  mov    (%r12),%r14
  cmp    (%r14,%rbx,1),%r9d
  je     L105
  cmp    %eax,%r8d
  je     L232
L220:
  mov    (%r12),%r14
  cmp    (%r14,%rbx,1),%r8d
  je     L232
  cmp    %edi,%eax
  je     L20
L173:
  mov    (%r12),%r14
  cmp    %edi,(%r14,%rbx,1)
  je     L20
  cmp    %esi,%eax
  je     L28
L303:
  mov    (%r12),%r14
  cmp    %esi,(%r14,%rbx,1)
  je     L28
  cmp    %ecx,%eax
  je     L116
L172:
  mov    (%r12),%r14
  cmp    %ecx,(%r14,%rbx,1)
  je     L116
  cmp    %edx,%eax
  je     L64
L296:
  mov    (%r12),%r14
  cmp    %edx,(%r14,%rbx,1)
  je     L64
  cmp    %ebp,%eax
  je     L363
L192:
  mov    (%r12),%rax
  cmp    %ebp,(%rax,%rbx,1)
  je     L363
  add    $0x8,%r12
  add    $0x4,%r13
  cmp    %r12,%r15
  je     L347
L352:
  mov    0x0(%r13),%eax
  cmp    %eax,%r11d
  jne    L126
L121:
  movb   $0x1,(%rsp)
  mov    $0xffffffff,%r11d
  cmp    %eax,%r10d
  jne    L195
L102:
  movb   $0x1,0x8(%rsp)
  mov    $0xffffffff,%r10d
  cmp    %eax,%r9d
  jne    L184
L105:
  movb   $0x1,0x27(%rsp)
  mov    $0xffffffff,%r9d
  cmp    %eax,%r8d
  jne    L220
L232:
  movb   $0x1,0x25(%rsp)
  mov    $0xffffffff,%r8d
  cmp    %edi,%eax
  jne    L173
L20:
  movb   $0x1,0x26(%rsp)
  mov    $0xffffffff,%edi
  cmp    %esi,%eax
  jne    L303
L28:
  movb   $0x1,0x24(%rsp)
  mov    $0xffffffff,%esi
  cmp    %ecx,%eax
  jne    L172
L116:
  movb   $0x1,0x23(%rsp)
  mov    $0xffffffff,%ecx
  cmp    %edx,%eax
  jne    L296
L64:
  movb   $0x1,0x18(%rsp)
  mov    $0xffffffff,%edx
  cmp    %ebp,%eax
  jne    L192
L363:
  add    $0x8,%r12
  movb   $0x1,0x10(%rsp)
  mov    $0xffffffff,%ebp
  add    $0x4,%r13
  cmp    %r12,%r15
  jne    L352
L347:
  cmpb   $0x0,0x10(%rsp)
  mov    $0x9,%eax
  movzbl 0x27(%rsp),%r15d
  cmove  %eax,%ebp
  cmpb   $0x0,0x18(%rsp)
  mov    $0x8,%eax
  mov    0x2c(%rsp),%r12d
  cmove  %eax,%edx
  cmpb   $0x0,0x23(%rsp)
  mov    $0x7,%eax
  mov    0x40(%rsp),%r14
  cmove  %eax,%ecx
  cmpb   $0x0,0x24(%rsp)
  mov    $0x6,%eax
  cmove  %eax,%esi
  cmpb   $0x0,0x26(%rsp)
  mov    $0x5,%eax
  cmove  %eax,%edi
  cmpb   $0x0,0x25(%rsp)
  mov    $0x4,%eax
  cmove  %eax,%r8d
  test   %r15b,%r15b
  mov    $0x3,%eax
  cmove  %eax,%r9d
  cmpb   $0x0,0x8(%rsp)
  mov    $0x2,%eax
  cmove  %eax,%r10d
  cmpb   $0x0,(%rsp)
  mov    $0x1,%eax
  cmove  %eax,%r11d
  sar    $0x1f,%r12d
  xor    %r13d,%r13d
  imul   $0x55555556,0x38(%rsp),%rax
  shr    $0x20,%rax
  sub    %r12d,%eax
  lea    (%rax,%rax,2),%r12d
  movslq %r12d,%rax
  sar    $0x1f,%r12d
  imul   $0x55555556,%rax,%rax
  shr    $0x20,%rax
  sub    %r12d,%eax
  lea    (%rax,%rax,2),%eax
  movslq %eax,%r12
  add    $0x1,%eax
  cltq
  lea    0x0(,%r12,4),%r15
  mov    0x28(%rsp),%r12d
  shl    $0x2,%rax
  mov    %r15,0x8(%rsp)
  mov    %rax,0x10(%rsp)
  add    $0x4,%rax
  sar    $0x1f,%r12d
  mov    %rax,0x18(%rsp)
  imul   $0x55555556,0x30(%rsp),%rax
  shr    $0x20,%rax
  sub    %r12d,%eax
  lea    (%rax,%rax,2),%r12d
  movslq %r12d,%rax
  sar    $0x1f,%r12d
  imul   $0x55555556,%rax,%rax
  shr    $0x20,%rax
  sub    %r12d,%eax
  lea    (%rax,%rax,2),%eax
  cltq
  lea    (%r14,%rax,8),%rax
  mov    %rax,(%rsp)
  mov    $0xffffffff,%eax
L262:
  mov    (%rsp),%r15
  mov    0x8(%rsp),%r12
  mov    (%r15,%r13,8),%r15
  mov    (%r15,%r12,1),%r12d
  cmp    %r12d,%r11d
  cmove  %eax,%r11d
  cmp    %r12d,%r10d
  cmove  %eax,%r10d
  cmp    %r12d,%r9d
  cmove  %eax,%r9d
  cmp    %r12d,%r8d
  cmove  %eax,%r8d
  cmp    %r12d,%edi
  cmove  %eax,%edi
  cmp    %r12d,%esi
  cmove  %eax,%esi
  cmp    %r12d,%ecx
  cmove  %eax,%ecx
  cmp    %edx,%r12d
  cmove  %eax,%edx
  cmp    %r12d,%ebp
  mov    0x10(%rsp),%r12
  cmove  %eax,%ebp
  mov    (%r15,%r12,1),%r12d
  cmp    %r12d,%r11d
  cmove  %eax,%r11d
  cmp    %r12d,%r10d
  cmove  %eax,%r10d
  cmp    %r12d,%r9d
  cmove  %eax,%r9d
  cmp    %r12d,%r8d
  cmove  %eax,%r8d
  cmp    %r12d,%edi
  cmove  %eax,%edi
  cmp    %r12d,%esi
  cmove  %eax,%esi
  cmp    %r12d,%ecx
  cmove  %eax,%ecx
  cmp    %r12d,%edx
  cmove  %eax,%edx
  cmp    %r12d,%ebp
  mov    0x18(%rsp),%r12
  cmove  %eax,%ebp
  mov    (%r15,%r12,1),%r12d
  cmp    %r12d,%r11d
  cmove  %eax,%r11d
  cmp    %r12d,%r10d
  cmove  %eax,%r10d
  cmp    %r12d,%r9d
  cmove  %eax,%r9d
  cmp    %r12d,%r8d
  cmove  %eax,%r8d
  cmp    %r12d,%edi
  cmove  %eax,%edi
  cmp    %r12d,%esi
  cmove  %eax,%esi
  cmp    %r12d,%ecx
  cmove  %eax,%ecx
  cmp    %edx,%r12d
  cmove  %eax,%edx
  add    $0x1,%r13
  cmp    %ebp,%r12d
  je     L100
  cmp    $0x3,%r13
  jne    L262
L293:
  mov    %r11d,0x50(%rsp)
  mov    0x48(%rsp),%r13
  lea    0x74(%rsp),%r12
  mov    %r10d,0x54(%rsp)
  mov    %r9d,0x58(%rsp)
  mov    %r8d,0x5c(%rsp)
  mov    %edi,0x60(%rsp)
  mov    %esi,0x64(%rsp)
  mov    %ecx,0x68(%rsp)
  mov    %edx,0x6c(%rsp)
  mov    %ebp,0x70(%rsp)
  lea    0x50(%rsp),%rbp
  nopl   0x0(%rax)
L290:
  mov    0x0(%rbp),%r15d
  cmp    $0xffffffff,%r15d
  je     L229
  mov    %r14,%rdi
  call   <copy@plt>
  mov    %rax,%rdi
  mov    (%rax,%r13,1),%rax
  mov    %r15d,(%rax,%rbx,1)
  call   <solve@plt>
  test   %rax,%rax
  jne    L2
L229:
  add    $0x4,%rbp
  cmp    %rbp,%r12
  jne    L290
  xor    %eax,%eax
L2:
  mov    0x78(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L311
  add    $0x88,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L100:
  mov    $0xffffffff,%ebp
  cmp    $0x3,%r13
  jne    L262
  jmp    L293
L311:
  call   <__stack_chk_fail@plt>
```

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;
}
```