user: 这段汇编代码用C语言表示是什么样的：

```asm
<least_squares>:
  endbr64
  push   %rbx
  mov    %rdx,%rbx
  mov    %esi,%ecx
  sub    $0x40,%rsp
  mov    %esi,0x8(%rsp)
  mov    %edi,0xc(%rsp)
  mov    %fs:0x28,%rdx
  mov    %rdx,0x38(%rsp)
  xor    %edx,%edx
  test   %edi,%edi
  setle  %dl
  test   %esi,%esi
  setle  %sil
  or     %sil,%dl
  jne    L195
  mov    %edi,%eax
  cmp    %ecx,%edi
  jl     L195
  imul   %edi,%eax
  lea    0x20(%rsp),%rdi
  mov    %eax,%esi
  mov    %eax,0x1c(%rsp)
  call   <allocate_double_vector@plt>
  test   %eax,%eax
  je     L43
  mov    0xc(%rsp),%edx
  mov    0x8(%rsp),%esi
  lea    0x28(%rsp),%rdi
  movb   $0x4e,0x17(%rsp)
  call   <allocate_double_matrix@plt>
  test   %eax,%eax
  je     L43
  mov    0xc(%rsp),%r9d
  test   %r9d,%r9d
  jle    L101
  movslq 0x8(%rsp),%rsi
  mov    0x28(%rsp),%rdi
  test   %esi,%esi
  jle    L101
  movslq %r9d,%r8
  xor    %edx,%edx
  shl    $0x3,%r8
  nop
L9:
  xor    %eax,%eax
  nopw   0x0(%rax,%rax,1)
L33:
  mov    (%rbx,%rax,8),%rcx
  movsd  (%rcx,%rdx,1),%xmm0
  mov    (%rdi,%rax,8),%rcx
  add    $0x1,%rax
  movsd  %xmm0,(%rcx,%rdx,1)
  cmp    %rax,%rsi
  jne    L33
  add    $0x8,%rdx
  cmp    %rdx,%r8
  jne    L9
L101:
  lea    0x30(%rsp),%rdi
  mov    %r9d,%edx
  mov    %r9d,%esi
  call   <allocate_double_matrix@plt>
  test   %eax,%eax
  je     L43
  movslq 0xc(%rsp),%rcx
  mov    0x30(%rsp),%rdi
  xor    %edx,%edx
  movsd  D2(%rip),%xmm0
  test   %ecx,%ecx
  jle    L123
  nopl   0x0(%rax)
L72:
  mov    (%rdi,%rdx,8),%rsi
  xor    %eax,%eax
  cs nopw 0x0(%rax,%rax,1)
L171:
  cmp    %edx,%eax
  je     L24
  movq   $0x0,(%rsi,%rax,8)
  add    $0x1,%rax
  cmp    %rax,%rcx
  jne    L171
  add    $0x1,%rdx
  cmp    %rdx,%rcx
  jne    L72
L123:
  lea    0xc(%rsp),%rsi
  lea    0x17(%rsp),%r10
  lea    0x8(%rsp),%rdx
  sub    $0x8,%rsp
  mov    %rsi,%r9
  mov    %rsi,%rcx
  lea    0x20(%rsp),%rax
  push   %rax
  lea    0x2c(%rsp),%rax
  push   %rax
  push   0x38(%rsp)
  push   %rsi
  push   (%rdi)
  mov    0x58(%rsp),%rax
  mov    %r10,%rdi
  mov    (%rax),%r8
  call   <dgels_@plt>
  movslq 0x38(%rsp),%rax
  add    $0x30,%rsp
  test   %eax,%eax
  jle    L162
  movslq 0xc(%rsp),%rdi
  mov    0x30(%rsp),%r8
  test   %edi,%edi
  jle    L162
  lea    0x0(,%rax,8),%r9
  xor    %ecx,%ecx
  nopl   0x0(%rax,%rax,1)
L69:
  mov    (%rbx,%rcx,1),%rsi
  xor    %eax,%eax
  xchg   %ax,%ax
L42:
  mov    (%r8,%rax,8),%rdx
  movsd  (%rdx,%rcx,1),%xmm0
  movsd  %xmm0,(%rsi,%rax,8)
  add    $0x1,%rax
  cmp    %rdi,%rax
  jne    L42
  add    $0x8,%rcx
  cmp    %rcx,%r9
  jne    L69
L162:
  mov    0x28(%rsp),%rdi
  call   <free_matrix@plt>
  mov    0x30(%rsp),%rdi
  call   <free_matrix@plt>
  mov    0x20(%rsp),%rdi
  call   <free_vector@plt>
  mov    $0x1,%eax
L135:
  mov    0x38(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L219
  add    $0x40,%rsp
  pop    %rbx
  ret
  nopl   0x0(%rax)
L24:
  movsd  %xmm0,(%rsi,%rax,8)
  add    $0x1,%rax
  cmp    %rax,%rcx
  jne    L171
  add    $0x1,%rdx
  cmp    %rdx,%rcx
  jne    L72
  jmp    L123
L43:
  mov    $0xffffffff,%eax
  jmp    L135
L195:
  mov    $0xfffffffe,%eax
  jmp    L135
L219:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: unpack_data
arguments: data_tag: D2
type: byte[8]

tool: {"D2": [0x00,0x00,0x00,0x00,0x00,0x00,0xf0,0x3f]}

assistant: ```c
int least_squares(int m, int n, double **matrix) {
  if (m < 1 || n < 1 || n > m)
    return -2;
  int i, j;
  int info, lwork = m * m;
  double *work;
  if (!allocate_double_vector(&work, lwork)) {
    return -1;
  }
  char transa = 'N';
  double **a_matrix;
  if (!allocate_double_matrix(&a_matrix, n, m)) {
    return -1;
  }
  for (i = 0; i < m; i++)
    for (j = 0; j < n; j++)
      a_matrix[j][i] = matrix[j][i];
  double **b_matrix;
  if (!allocate_double_matrix(&b_matrix, m, m)) {
    return -1;
  }
  for (i = 0; i < m; i++)
    for (j = 0; j < m; j++)
      b_matrix[i][j] = (i == j);
  dgels_(&transa, &m, &n, &m, a_matrix[0], &m, b_matrix[0], &m, work, &lwork, &info);
  for (i = 0; i < n; i++)
    for (j = 0; j < m; j++)
      matrix[i][j] = b_matrix[j][i];
  free_matrix((void **)a_matrix);
  free_matrix((void **)b_matrix);
  free_vector(work);
  return 1;
}
```