user: 这段汇编代码用C语言表示是什么样的:

```asm
<lu_invert>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x48,%rsp
  mov    %rdi,%r12
  mov    %esi,%ebx
  mov    %fs:0x28,%rax
  mov    %rax,0x38(%rsp)
  xor    %eax,%eax
  cmp    $0xa,%esi
  jg     L27
  lea    0x8(%rsp),%rcx
  lea    0x10(%rsp),%rdx
  call   <lu_decomp@plt>
  mov    %rax,%rdx
  mov    $0x1,%eax
  test   %rdx,%rdx
  jne    L121
  lea    -0x1(%rbx),%r15d
  mov    %r15d,%ecx
  mov    $0x0,%edx
  mov    %r15d,%esi
  mov    $0x0,%edi
  call   <dmatrix@plt>
  mov    %rax,%r14
  lea    0x10(%rsp),%r13
  test   %ebx,%ebx
  jg     L51
  mov    %r15d,%r8d
  mov    $0x0,%ecx
  mov    %r15d,%edx
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <free_dmatrix@plt>
  mov    $0x0,%eax
  jmp    L121
L27:
  lea    -0x1(%rsi),%r15d
  mov    %r15d,%esi
  mov    $0x0,%edi
  call   <ivector@plt>
  mov    %rax,%r13
  lea    0x8(%rsp),%rcx
  mov    %rax,%rdx
  mov    %ebx,%esi
  mov    %r12,%rdi
  call   <lu_decomp@plt>
  test   %rax,%rax
  jne    L55
  mov    %r15d,%ecx
  mov    $0x0,%edx
  mov    %r15d,%esi
  mov    $0x0,%edi
  call   <dmatrix@plt>
  mov    %rax,%r14
L51:
  mov    %r12,%rbp
  mov    %r14,%rsi
  mov    %r12,%rcx
  mov    $0x0,%edi
L39:
  mov    $0x0,%eax
L116:
  mov    (%rcx),%rdx
  movsd  (%rdx,%rax,8),%xmm0
  mov    (%rsi),%rdx
  movsd  %xmm0,(%rdx,%rax,8)
  add    $0x1,%rax
  cmp    %eax,%ebx
  jg     L116
  add    $0x1,%edi
  add    $0x8,%rcx
  add    $0x8,%rsi
  cmp    %edi,%ebx
  jg     L39
  mov    $0x0,%r12d
L82:
  mov    $0x0,%eax
  mov    %rbp,%rcx
L77:
  mov    0x0(%rbp),%rdx
  movq   $0x0,(%rdx,%rax,8)
  add    $0x1,%rax
  cmp    %eax,%ebx
  jg     L77
  mov    (%rcx),%rax
  mov    D6(%rip),%rdi
  mov    %rdi,(%rax,%r12,8)
  mov    (%rcx),%rcx
  mov    %r13,%rdx
  mov    %ebx,%esi
  mov    %r14,%rdi
  call   <lu_backsub@plt>
  add    $0x1,%r12
  add    $0x8,%rbp
  cmp    %r12d,%ebx
  jg     L82
  mov    %r15d,%r8d
  mov    $0x0,%ecx
  mov    %r15d,%edx
  mov    $0x0,%esi
  mov    %r14,%rdi
  call   <free_dmatrix@plt>
  lea    0x10(%rsp),%rdx
  mov    $0x0,%eax
  cmp    %rdx,%r13
  je     L121
  mov    %r15d,%edx
  mov    $0x0,%esi
  mov    %r13,%rdi
  call   <free_ivector@plt>
  mov    $0x0,%eax
  jmp    L121
L55:
  lea    0x10(%rsp),%rax
  cmp    %rax,%r13
  je     L67
  mov    %r15d,%edx
  mov    $0x0,%esi
  mov    %r13,%rdi
  call   <free_ivector@plt>
  mov    $0x1,%eax
L121:
  mov    0x38(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L13
  add    $0x48,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L67:
  mov    $0x1,%eax
  jmp    L121
L13:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: unpack_data
arguments: label: D6
type_guessed: f64

tool: D6: 1

assistant: ```c
int lu_invert(double **a, int n) {
  int i, j;
  double rip;
  int *pivx, PIVX[10];
  double **y;
  if (n <= 10)
    pivx = PIVX;
  else
    pivx = ivector(0, n - 1);
  if (lu_decomp(a, n, pivx, &rip)) {
    if (pivx != PIVX)
      free_ivector(pivx, 0, n - 1);
    return 1;
  }
  y = dmatrix(0, n - 1, 0, n - 1);
  for (i = 0; i < n; i++) {
    for (j = 0; j < n; j++) {
      y[i][j] = a[i][j];
    }
  }
  for (i = 0; i < n; i++) {
    for (j = 0; j < n; j++)
      a[i][j] = 0.0;
    a[i][i] = 1.0;
    lu_backsub(y, n, pivx, a[i]);
  }
  free_dmatrix(y, 0, n - 1, 0, n - 1);
  if (pivx != PIVX)
    free_ivector(pivx, 0, n - 1);
  return 0;
}
```