user: Demonstrate the C code that generates the assembly output below:

```asm
<lu_invert>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  mov    %esi,%ebx
  sub    $0x68,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x58(%rsp)
  xor    %eax,%eax
  cmp    $0xa,%esi
  jg     L68
  lea    0x30(%rsp),%rax
  lea    0x28(%rsp),%rcx
  mov    %rax,%rdx
  mov    %rax,0x10(%rsp)
  call   <lu_decomp@plt>
  test   %rax,%rax
  jne    L132
  lea    -0x1(%rbx),%eax
  xor    %edx,%edx
  xor    %edi,%edi
  mov    %eax,%esi
  mov    %eax,%ecx
  mov    %eax,0x1c(%rsp)
  call   <dmatrix@plt>
  mov    0x10(%rsp),%r13
  mov    %rax,%r14
  test   %ebx,%ebx
  jle    L6
L107:
  test   %ebx,%ebx
  mov    $0x1,%r12d
  cmovg  %ebx,%r12d
  xor    %r10d,%r10d
  mov    %r12d,%eax
  mov    %r12d,%edi
  mov    %r12d,0x18(%rsp)
  shr    %eax
  and    $0xfffffffe,%edi
  lea    -0x1(%rax),%r15d
  movslq %edi,%rsi
  add    $0x1,%r15
  mov    %rsi,%r12
  shl    $0x3,%rsi
  shl    $0x4,%r15
  nopl   0x0(%rax)
L102:
  mov    0x0(%rbp,%r10,8),%rdx
  mov    (%r14,%r10,8),%rcx
  lea    0x8(%rdx),%rax
  cmp    %rax,%rcx
  je     L176
  xor    %eax,%eax
  cmp    $0x3,%ebx
  jle    L176
  nopl   0x0(%rax)
L47:
  movupd (%rdx,%rax,1),%xmm1
  movups %xmm1,(%rcx,%rax,1)
  add    $0x10,%rax
  cmp    %rax,%r15
  jne    L47
  cmp    %r12d,0x18(%rsp)
  je     L150
  movsd  (%rdx,%rsi,1),%xmm0
  movsd  %xmm0,(%rcx,%rsi,1)
L150:
  add    $0x1,%r10
  cmp    %r10d,%ebx
  jg     L102
  xor    %r10d,%r10d
  pxor   %xmm0,%xmm0
  nopl   0x0(%rax,%rax,1)
L59:
  mov    0x0(%rbp,%r10,8),%rcx
  lea    0x0(,%r10,8),%rdx
  cmp    $0x1,%ebx
  jle    L77
  mov    %rcx,%rax
  lea    (%rcx,%r15,1),%rsi
  nopl   (%rax)
L105:
  movups %xmm0,(%rax)
  add    $0x10,%rax
  cmp    %rax,%rsi
  jne    L105
  movslq %r12d,%rax
  cmp    %r12d,0x18(%rsp)
  je     L11
L195:
  movq   $0x0,(%rcx,%rax,8)
L11:
  mov    D1(%rip),%rax
  mov    %ebx,%esi
  mov    %r14,%rdi
  mov    %r10,0x8(%rsp)
  mov    %rax,(%rcx,%rdx,1)
  mov    %r13,%rdx
  call   <lu_backsub@plt>
  mov    0x8(%rsp),%r10
  pxor   %xmm0,%xmm0
  add    $0x1,%r10
  cmp    %r10d,%ebx
  jg     L59
  mov    0x1c(%rsp),%ebx
  xor    %ecx,%ecx
  xor    %esi,%esi
  mov    %r14,%rdi
  xor    %r12d,%r12d
  mov    %ebx,%r8d
  mov    %ebx,%edx
  call   <free_dmatrix@plt>
  cmp    0x10(%rsp),%r13
  je     L112
  mov    %ebx,%edx
  xor    %esi,%esi
  mov    %r13,%rdi
  call   <free_ivector@plt>
  jmp    L112
L68:
  lea    -0x1(%rsi),%eax
  xor    %edi,%edi
  mov    %eax,%esi
  mov    %eax,0x1c(%rsp)
  call   <ivector@plt>
  lea    0x28(%rsp),%rcx
  mov    %ebx,%esi
  mov    %rbp,%rdi
  mov    %rax,%rdx
  mov    %rax,%r13
  call   <lu_decomp@plt>
  test   %rax,%rax
  je     L109
  lea    0x30(%rsp),%rax
  cmp    %rax,%r13
  je     L132
  mov    0x1c(%rsp),%edx
  xor    %esi,%esi
  mov    %r13,%rdi
  call   <free_ivector@plt>
L132:
  mov    $0x1,%r12d
L112:
  mov    0x58(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L100
  add    $0x68,%rsp
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax,%rax,1)
L176:
  xor    %eax,%eax
  nopw   0x0(%rax,%rax,1)
L9:
  movsd  (%rdx,%rax,8),%xmm0
  movsd  %xmm0,(%rcx,%rax,8)
  add    $0x1,%rax
  cmp    %eax,%ebx
  jg     L9
  jmp    L150
  nop
L77:
  xor    %eax,%eax
  jmp    L195
L109:
  mov    0x1c(%rsp),%esi
  xor    %edx,%edx
  xor    %edi,%edi
  mov    %esi,%ecx
  call   <dmatrix@plt>
  mov    %rax,%r14
  lea    0x30(%rsp),%rax
  mov    %rax,0x10(%rsp)
  jmp    L107
L6:
  mov    0x1c(%rsp),%edx
  xor    %ecx,%ecx
  xor    %esi,%esi
  mov    %rax,%rdi
  xor    %r12d,%r12d
  mov    %edx,%r8d
  call   <free_dmatrix@plt>
  jmp    L112
L100:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: tag: D1
type_guessed: f64

tool: D1: 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;
}
```