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

```asm
<polyfit>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  mov    %rdi,%r13
  movslq %edx,%rdi
  push   %r12
  lea    0x0(,%rdi,8),%eax
  mov    %rdi,%r15
  mov    %rcx,%r12
  push   %rbp
  mov    %r15d,%r14d
  push   %rbx
  lea    0x1(%r8),%ebx
  sub    $0x38,%rsp
  mov    %rdi,0x20(%rsp)
  mov    %eax,%edi
  imul   %ebx,%edi
  mov    %rsi,0x28(%rsp)
  mov    %r8d,0x8(%rsp)
  mov    %eax,0x10(%rsp)
  mov    %edi,0x18(%rsp)
  call   <malloc@plt>
  cmp    %r15d,%ebx
  mov    0x18(%rsp),%edi
  cmovle %ebx,%r14d
  mov    %rax,%rbp
  shl    $0x3,%r14d
  test   %r15d,%r15d
  jle    L71
  mov    0x8(%rsp),%eax
  movslq %ebx,%rsi
  movsd  D4(%rip),%xmm1
  mov    %rbp,%rcx
  shl    $0x3,%rsi
  sub    $0x1,%eax
  lea    0x8(%rbp,%rax,8),%rdx
  lea    -0x1(%r15),%eax
  shl    $0x3,%rax
  mov    %rax,0x18(%rsp)
  lea    0x8(%r13,%rax,1),%r8
  nopl   0x0(%rax,%rax,1)
L20:
  movsd  %xmm1,(%rcx)
  mov    %rcx,%rax
  cmp    $0x1,%ebx
  jle    L41
  nopl   0x0(%rax)
L12:
  movsd  (%rax),%xmm0
  mulsd  0x0(%r13),%xmm0
  add    $0x8,%rax
  movsd  %xmm0,(%rax)
  cmp    %rdx,%rax
  jne    L12
L41:
  add    $0x8,%r13
  add    %rsi,%rcx
  add    %rsi,%rdx
  cmp    %r8,%r13
  jne    L20
  call   <malloc@plt>
  mov    %r14d,%edi
  mov    %rax,%r13
  call   <malloc@plt>
  mov    0x20(%rsp),%rsi
  mov    %r13,%r9
  xor    %r8d,%r8d
  mov    0x8(%rsp),%r11d
  mov    %rax,%r14
  xor    %edi,%edi
  lea    0x8(%rbp),%r10
  shl    $0x3,%rsi
  nopl   0x0(%rax,%rax,1)
L99:
  test   %ebx,%ebx
  jle    L64
  movslq %r8d,%rdx
  lea    0x0(%rbp,%rdx,8),%rax
  add    %r11,%rdx
  lea    (%r10,%rdx,8),%rcx
  mov    %r9,%rdx
  xchg   %ax,%ax
L104:
  movsd  (%rax),%xmm0
  add    $0x8,%rax
  movsd  %xmm0,(%rdx)
  add    %rsi,%rdx
  cmp    %rcx,%rax
  jne    L104
L64:
  add    $0x1,%edi
  add    $0x8,%r9
  add    %ebx,%r8d
  cmp    %edi,%r15d
  jne    L99
  push   %r15
  xor    %ecx,%ecx
  mov    %r14,%rdx
  mov    %r15d,%esi
  push   %rbx
  xor    %r9d,%r9d
  xor    %r8d,%r8d
  mov    %r13,%rdi
  call   <qrdecomp_hh@plt>
  mov    0x20(%rsp),%edi
  call   <malloc@plt>
  mov    %rax,%r10
  mov    0x28(%rsp),%rax
  pop    %rsi
  pop    %rdi
  mov    0x28(%rsp),%rdx
  lea    0x8(%r10,%rax,1),%rcx
  mov    %r10,%rax
  sub    %r10,%rdx
  nop
L84:
  movsd  (%rdx,%rax,1),%xmm0
  add    $0x8,%rax
  movsd  %xmm0,-0x8(%rax)
  cmp    %rax,%rcx
  jne    L84
L59:
  push   $0x1
  mov    %ebx,%r9d
  mov    %r15d,%r8d
  mov    %r10,%rcx
  push   %r15
  mov    %r14,%rdx
  mov    %r15d,%esi
  mov    %r13,%rdi
  mov    %r10,0x20(%rsp)
  call   <qrsolve_hh@plt>
  test   %ebx,%ebx
  pop    %r8
  pop    %r9
  mov    0x10(%rsp),%r10
  jle    L107
  mov    0x8(%rsp),%eax
  lea    0x8(,%rax,8),%rdx
  xor    %eax,%eax
  xchg   %ax,%ax
L102:
  movsd  (%r10,%rax,1),%xmm0
  movsd  %xmm0,(%r12,%rax,1)
  add    $0x8,%rax
  cmp    %rdx,%rax
  jne    L102
L107:
  mov    %r13,%rdi
  mov    %r10,0x8(%rsp)
  call   <free@plt>
  mov    %r14,%rdi
  call   <free@plt>
  mov    0x8(%rsp),%rdi
  call   <free@plt>
  add    $0x38,%rsp
  mov    %rbp,%rdi
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    1080 <free@plt>
L71:
  call   <malloc@plt>
  mov    %r14d,%edi
  mov    %rax,%r13
  call   <malloc@plt>
  push   %r15
  xor    %r9d,%r9d
  xor    %r8d,%r8d
  push   %rbx
  mov    %rax,%rdx
  xor    %ecx,%ecx
  mov    %r15d,%esi
  mov    %r13,%rdi
  mov    %rax,%r14
  call   <qrdecomp_hh@plt>
  mov    0x20(%rsp),%edi
  call   <malloc@plt>
  mov    %rax,%r10
  pop    %rax
  pop    %rdx
  jmp    L59
```

tool_calls: name: read_data
arguments: label: D4
type_guessed: byte[8]

tool: {"D4": [0x00,0x00,0x00,0x00,0x00,0x00,0xf0,0x3f]}

assistant: ```c
void polyfit(const double *_x, const double *_y, int _n, double *_c, int _deg) {
  int m;
  double *x;
  int j;
  int i;
  m = _deg + 1;
  x = (double *)malloc(sizeof(*x) * _n * m);
  for (j = 0; j < _n; j++) {
    x[j * m + 0] = 1;
    for (i = 1; i < m; i++) {
      x[j * m + i] = x[j * m + i - 1] * _x[j];
    }
  }
  {
    double *qrt;
    double *d;
    double *b;
    qrt = (double *)malloc(sizeof(*qrt) * _n * m);
    d = (double *)malloc(sizeof(*d) * ((m) > (_n) ? (_n) : (m)));
    for (j = 0; j < _n; j++) {
      for (i = 0; i < m; i++) {
        qrt[i * _n + j] = x[j * m + i];
      }
    }
    qrdecomp_hh(qrt, _n, d, NULL, 0, NULL, m, _n);
    b = (double *)malloc(sizeof(*b) * _n);
    for (j = 0; j < _n; j++) {
      b[j] = _y[j];
    }
    qrsolve_hh(qrt, _n, d, b, _n, m, _n, 1);
    for (j = 0; j < m; j++) {
      _c[j] = b[j];
    }
    free(qrt);
    free(d);
    free(b);
  }
  free(x);
}
```