user: 请从给定的汇编指令推导出C源代码:

```asm
<solve_at_xy>:
  endbr64
  push   %r15
  movslq %esi,%rax
  mov    %edx,%ecx
  mov    $0x1,%r15d
  push   %r14
  push   %r13
  push   %r12
  mov    %rdi,%r12
  push   %rbp
  push   %rbx
  sub    $0x48,%rsp
  mov    %edx,0x10(%rsp)
  lea    (%rax,%rax,8),%rdx
  imul   $0x55555556,%rax,%rax
  lea    (%rdi,%rdx,4),%rdx
  mov    %esi,0x4(%rsp)
  sar    $0x1f,%esi
  mov    %rdx,0x18(%rsp)
  movslq %ecx,%rdx
  sar    $0x1f,%ecx
  shr    $0x20,%rax
  sub    %esi,%eax
  lea    (%rax,%rax,2),%edi
  imul   $0x55555556,%rdx,%rax
  mov    %edi,0x2c(%rsp)
  shr    $0x20,%rax
  sub    %ecx,%eax
  lea    0x2(%rdi),%ecx
  lea    (%rax,%rax,2),%eax
  mov    %ecx,0x28(%rsp)
  lea    0x3(%rdi),%ecx
  mov    %eax,%esi
  mov    %eax,0x14(%rsp)
  lea    0x3(%rax),%eax
  mov    %eax,0x3c(%rsp)
  movslq %edi,%rax
  mov    %ecx,0x38(%rsp)
  lea    (%rax,%rax,8),%rax
  movslq %esi,%rcx
  add    %rcx,%rax
  lea    (%r12,%rax,4),%rax
  mov    %rax,0x30(%rsp)
  lea    0x0(,%rdx,4),%rax
  mov    %rax,0x20(%rsp)
L370:
  mov    0x10(%rsp),%ebx
  mov    0x4(%rsp),%r14d
  mov    %r15d,%esi
  mov    %r12,%rdi
  mov    %ebx,%ecx
  mov    %r14d,%edx
  call   <check_conflict@plt>
  cmp    $0x1,%eax
  je     L585
  mov    0x18(%rsp),%rax
  mov    (%rax),%ecx
  test   %ecx,%ecx
  jne    L83
  test   %ebx,%ebx
  je     L83
  xor    %ecx,%ecx
  mov    %r14d,%edx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  je     L471
L83:
  mov    0x18(%rsp),%rax
  mov    0x4(%rax),%edx
  test   %edx,%edx
  jne    L22
  cmpl   $0x1,0x10(%rsp)
  je     L22
  mov    0x4(%rsp),%edx
  mov    $0x1,%ecx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  je     L471
L22:
  mov    0x18(%rsp),%rax
  mov    0x8(%rax),%eax
  test   %eax,%eax
  jne    L505
  cmpl   $0x2,0x10(%rsp)
  je     L505
  mov    0x4(%rsp),%edx
  mov    $0x2,%ecx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  je     L471
L505:
  mov    0x18(%rsp),%rax
  mov    0xc(%rax),%eax
  test   %eax,%eax
  jne    L349
  cmpl   $0x3,0x10(%rsp)
  je     L349
  mov    0x4(%rsp),%edx
  mov    $0x3,%ecx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  je     L471
L349:
  mov    0x18(%rsp),%rax
  mov    0x10(%rax),%eax
  test   %eax,%eax
  jne    L657
  cmpl   $0x4,0x10(%rsp)
  je     L657
  mov    0x4(%rsp),%edx
  mov    $0x4,%ecx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  je     L471
L657:
  mov    0x18(%rsp),%rax
  mov    0x14(%rax),%eax
  test   %eax,%eax
  jne    L577
  cmpl   $0x5,0x10(%rsp)
  je     L577
  mov    0x4(%rsp),%edx
  mov    $0x5,%ecx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  je     L471
L577:
  mov    0x18(%rsp),%rax
  mov    0x18(%rax),%eax
  test   %eax,%eax
  jne    L222
  cmpl   $0x6,0x10(%rsp)
  je     L222
  mov    0x4(%rsp),%edx
  mov    $0x6,%ecx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  je     L471
L222:
  mov    0x18(%rsp),%rax
  mov    0x1c(%rax),%r14d
  test   %r14d,%r14d
  jne    L287
  cmpl   $0x7,0x10(%rsp)
  je     L287
  mov    0x4(%rsp),%edx
  mov    $0x7,%ecx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  je     L471
L287:
  mov    0x18(%rsp),%rax
  mov    0x20(%rax),%r13d
  test   %r13d,%r13d
  jne    L414
  cmpl   $0x8,0x10(%rsp)
  je     L414
  mov    0x4(%rsp),%edx
  mov    $0x8,%ecx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  je     L471
L414:
  add    $0x48,%rsp
  mov    %r15d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L471:
  mov    0x20(%rsp),%rax
  mov    (%r12,%rax,1),%ebp
  test   %ebp,%ebp
  jne    L301
  mov    0x4(%rsp),%ebx
  test   %ebx,%ebx
  je     L301
  mov    0x10(%rsp),%ecx
  xor    %edx,%edx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  je     L510
L301:
  mov    0x20(%rsp),%rax
  mov    0x24(%r12,%rax,1),%r11d
  test   %r11d,%r11d
  jne    L637
  cmpl   $0x1,0x4(%rsp)
  je     L637
  mov    0x10(%rsp),%ecx
  mov    $0x1,%edx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  je     L510
L637:
  mov    0x20(%rsp),%rax
  mov    0x48(%r12,%rax,1),%r10d
  test   %r10d,%r10d
  jne    L369
  cmpl   $0x2,0x4(%rsp)
  je     L369
  mov    0x10(%rsp),%ecx
  mov    $0x2,%edx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  je     L510
L369:
  mov    0x20(%rsp),%rax
  mov    0x6c(%r12,%rax,1),%r9d
  test   %r9d,%r9d
  jne    L115
  cmpl   $0x3,0x4(%rsp)
  je     L115
  mov    0x10(%rsp),%ecx
  mov    $0x3,%edx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  je     L510
L115:
  mov    0x20(%rsp),%rax
  mov    0x90(%r12,%rax,1),%r8d
  test   %r8d,%r8d
  jne    L112
  cmpl   $0x4,0x4(%rsp)
  je     L112
  mov    0x10(%rsp),%ecx
  mov    $0x4,%edx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  je     L510
L112:
  mov    0x20(%rsp),%rax
  mov    0xb4(%r12,%rax,1),%edi
  test   %edi,%edi
  jne    L180
  cmpl   $0x5,0x4(%rsp)
  je     L180
  mov    0x10(%rsp),%ecx
  mov    $0x5,%edx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  je     L510
L180:
  mov    0x20(%rsp),%rax
  mov    0xd8(%r12,%rax,1),%esi
  test   %esi,%esi
  jne    L62
  cmpl   $0x6,0x4(%rsp)
  je     L62
  mov    0x10(%rsp),%ecx
  mov    $0x6,%edx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  je     L510
L62:
  mov    0x20(%rsp),%rax
  mov    0xfc(%r12,%rax,1),%ecx
  test   %ecx,%ecx
  jne    L266
  cmpl   $0x7,0x4(%rsp)
  je     L266
  mov    0x10(%rsp),%ecx
  mov    $0x7,%edx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  jne    L266
L510:
  mov    0x14(%rsp),%eax
  mov    0x2c(%rsp),%r14d
  lea    0x2(%rax),%r13d
  mov    0x30(%rsp),%rax
  mov    %r13d,%ebp
  mov    %rax,0x8(%rsp)
  nopw   0x0(%rax,%rax,1)
L145:
  mov    0x8(%rsp),%rbx
  mov    0x14(%rsp),%r13d
  jmp    L58
  nopl   0x0(%rax)
L257:
  add    $0x1,%r13d
  add    $0x4,%rbx
  cmp    %ebp,%r13d
  jg     L0
L58:
  mov    (%rbx),%eax
  test   %eax,%eax
  jne    L257
  cmp    %r14d,0x4(%rsp)
  jne    L476
  cmp    %r13d,0x10(%rsp)
  je     L257
L476:
  mov    %r13d,%ecx
  mov    %r14d,%edx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  jne    L257
L36:
  mov    %r13d,%ebp
  cmp    %r14d,0x38(%rsp)
  jne    L585
  cmp    %ebp,0x3c(%rsp)
  je     L414
  xchg   %ax,%ax
L585:
  add    $0x1,%r15d
  cmp    $0xa,%r15d
  jne    L370
  xor    %r15d,%r15d
  jmp    L414
L266:
  mov    0x20(%rsp),%rax
  mov    0x120(%r12,%rax,1),%edx
  test   %edx,%edx
  jne    L414
  cmpl   $0x8,0x4(%rsp)
  je     L414
  mov    0x10(%rsp),%ecx
  mov    $0x8,%edx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <check_conflict@plt>
  test   %eax,%eax
  jne    L414
  jmp    L510
  nopw   0x0(%rax,%rax,1)
L0:
  addq   $0x24,0x8(%rsp)
  add    $0x1,%r14d
  cmp    0x28(%rsp),%r14d
  jle    L145
  jmp    L36
```

assistant: ```c
int solve_at_xy(const int sudoku[9][9], const int row_no, const int column_no) {
  int test_value, i, j, row_start, column_start;
  for (test_value = 1; test_value <= 9; ++test_value) {
    if (check_conflict(sudoku, test_value, row_no, column_no) == 1) {
      continue;
    }
    for (i = 0; i < 9; ++i) {
      if ((sudoku[row_no][i] != 0) || (i == column_no)) {
        continue;
      }
      if (check_conflict(sudoku, test_value, row_no, i) == 0) {
        break;
      }
    }
    if (i == 9) {
      return test_value;
    }
    for (i = 0; i < 9; ++i) {
      if ((sudoku[i][column_no] != 0) || (i == row_no)) {
        continue;
      }
      if (check_conflict(sudoku, test_value, i, column_no) == 0) {
        break;
      }
    }
    if (i == 9) {
      return test_value;
    }
    row_start = row_no - (row_no % 3);
    column_start = column_no - (column_no % 3);
    for (i = row_start; i < row_start + 3; ++i) {
      for (j = column_start; j < column_start + 3; ++j) {
        if ((sudoku[i][j] != 0) || (i == row_no && j == column_no)) {
          continue;
        }
        if (check_conflict(sudoku, test_value, i, j) == 0) {
          break;
        }
      }
      if (j < column_start + 3) {
        break;
      }
    }
    if ((i == row_start + 3) && (j == column_start + 3)) {
      return test_value;
    }
  }
  return 0;
}
```