user: What is the c source code of the assembly code below?

```asm
<cftmd21>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x90,%rsp
  mov    %edi,-0x74(%rbp)
  mov    %esi,-0x78(%rbp)
  mov    %rdx,-0x80(%rbp)
  mov    %rcx,-0x88(%rbp)
  mov    -0x78(%rbp),%eax
  shl    $0x2,%eax
  mov    %eax,-0x5c(%rbp)
  mov    -0x5c(%rbp),%eax
  add    %eax,%eax
  mov    %eax,-0x58(%rbp)
  mov    -0x5c(%rbp),%edx
  mov    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  mov    %eax,-0x54(%rbp)
  mov    -0x88(%rbp),%rax
  add    $0x8,%rax
  mov    %rax,-0x50(%rbp)
  mov    -0x78(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x80(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x48(%rbp)
  mov    -0x78(%rbp),%eax
  cltq
  shl    $0x4,%rax
  mov    %rax,%rdx
  mov    -0x80(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x40(%rbp)
  mov    -0x78(%rbp),%eax
  movslq %eax,%rdx
  mov    %rdx,%rax
  add    %rax,%rax
  add    %rdx,%rax
  shl    $0x3,%rax
  mov    %rax,%rdx
  mov    -0x80(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x38(%rbp)
  mov    -0x58(%rbp),%eax
  mov    %eax,-0x64(%rbp)
  movl   $0x2,-0x60(%rbp)
  jmp    L37
L55:
  mov    -0x60(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x88(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  movsd  %xmm0,-0x30(%rbp)
  mov    -0x60(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  movsd  %xmm0,-0x28(%rbp)
  mov    -0x60(%rbp),%eax
  add    %eax,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x88(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  movsd  %xmm0,-0x20(%rbp)
  mov    -0x60(%rbp),%eax
  add    %eax,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  movsd  %xmm0,-0x18(%rbp)
  movsd  -0x28(%rbp),%xmm0
  addsd  %xmm0,%xmm0
  movapd %xmm0,%xmm1
  mulsd  -0x18(%rbp),%xmm1
  movsd  -0x20(%rbp),%xmm0
  subsd  %xmm1,%xmm0
  movsd  %xmm0,-0x10(%rbp)
  movsd  -0x28(%rbp),%xmm0
  addsd  %xmm0,%xmm0
  mulsd  -0x20(%rbp),%xmm0
  subsd  -0x18(%rbp),%xmm0
  movsd  %xmm0,-0x8(%rbp)
  mov    -0x64(%rbp),%eax
  mov    %eax,-0x68(%rbp)
  jmp    L40
L17:
  mov    -0x80(%rbp),%rax
  mov    %rax,%rdi
  call   <resetA@plt>
  mov    -0x38(%rbp),%r8
  mov    -0x40(%rbp),%rcx
  mov    -0x48(%rbp),%rdx
  mov    -0x80(%rbp),%rsi
  movsd  -0x8(%rbp),%xmm4
  movsd  -0x10(%rbp),%xmm3
  movsd  -0x28(%rbp),%xmm2
  movsd  -0x30(%rbp),%xmm1
  movsd  -0x18(%rbp),%xmm0
  mov    -0x20(%rbp),%rdi
  mov    -0x68(%rbp),%eax
  movapd %xmm4,%xmm5
  movapd %xmm3,%xmm4
  movapd %xmm2,%xmm3
  movapd %xmm1,%xmm2
  movapd %xmm0,%xmm1
  movq   %rdi,%xmm0
  mov    %eax,%edi
  call   <btrfly@plt>
  addl   $0x2,-0x68(%rbp)
L40:
  mov    -0x64(%rbp),%edx
  mov    -0x78(%rbp),%eax
  add    %edx,%eax
  cmp    %eax,-0x68(%rbp)
  jl     L17
  mov    -0x60(%rbp),%eax
  add    %eax,%eax
  cltq
  add    $0x2,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x88(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  movsd  %xmm0,-0x20(%rbp)
  mov    -0x60(%rbp),%eax
  add    %eax,%eax
  cltq
  add    $0x2,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  movsd  %xmm0,-0x18(%rbp)
  movsd  -0x30(%rbp),%xmm0
  addsd  %xmm0,%xmm0
  movapd %xmm0,%xmm1
  mulsd  -0x18(%rbp),%xmm1
  movsd  -0x20(%rbp),%xmm0
  subsd  %xmm1,%xmm0
  movsd  %xmm0,-0x10(%rbp)
  movsd  -0x30(%rbp),%xmm0
  addsd  %xmm0,%xmm0
  mulsd  -0x20(%rbp),%xmm0
  subsd  -0x18(%rbp),%xmm0
  movsd  %xmm0,-0x8(%rbp)
  mov    -0x64(%rbp),%edx
  mov    -0x5c(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x68(%rbp)
  jmp    L41
L46:
  mov    -0x80(%rbp),%rax
  mov    %rax,%rdi
  call   <resetA@plt>
  movsd  -0x28(%rbp),%xmm0
  movq   D5(%rip),%xmm1
  xorpd  %xmm0,%xmm1
  mov    -0x38(%rbp),%r8
  mov    -0x40(%rbp),%rcx
  mov    -0x48(%rbp),%rdx
  mov    -0x80(%rbp),%rsi
  movsd  -0x8(%rbp),%xmm4
  movsd  -0x10(%rbp),%xmm3
  movsd  -0x30(%rbp),%xmm2
  movsd  -0x18(%rbp),%xmm0
  mov    -0x20(%rbp),%rdi
  mov    -0x68(%rbp),%eax
  movapd %xmm4,%xmm5
  movapd %xmm3,%xmm4
  movapd %xmm2,%xmm3
  movapd %xmm1,%xmm2
  movapd %xmm0,%xmm1
  movq   %rdi,%xmm0
  mov    %eax,%edi
  call   <btrfly@plt>
  addl   $0x2,-0x68(%rbp)
L41:
  mov    -0x64(%rbp),%edx
  mov    -0x5c(%rbp),%eax
  add    %eax,%edx
  mov    -0x78(%rbp),%eax
  add    %edx,%eax
  cmp    %eax,-0x68(%rbp)
  jl     L46
  mov    -0x58(%rbp),%eax
  add    %eax,-0x64(%rbp)
  addl   $0x2,-0x60(%rbp)
L37:
  mov    -0x64(%rbp),%eax
  cmp    -0x74(%rbp),%eax
  jl     L55
  nop
  nop
  leave
  ret
```

tool_calls: name: retrieve_data
arguments: data_label: D5
type_guessed: byte[8]

tool: {"D5": [0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80]}

assistant: ```c
void cftmd21(int n, int l, double *a, double *w) {
  int j, k, k1;
  int m = l << 2;
  int m2 = 2 * m;
  int m3 = 3 * m;
  double *v = w + 1;
  double *b = a + l;
  double *c = a + l + l;
  double *d = a + l + l + l;
  for (k = m2, k1 = 2; k < n; k += m2, k1 += 2) {
    double wk2r = w[k1];
    double wk2i = v[k1];
    double wk1r = w[k1 + k1];
    double wk1i = v[k1 + k1];
    double wk3r = wk1r - 2 * wk2i * wk1i;
    double wk3i = 2 * wk2i * wk1r - wk1i;
#pragma mta use 100 streams
#pragma mta assert no dependence
    for (j = k; j < k + l; j += 2) {
      resetA(a);
      btrfly(j, wk1r, wk1i, wk2r, wk2i, wk3r, wk3i, a, b, c, d);
    }
    wk1r = w[k1 + k1 + 2];
    wk1i = v[k1 + k1 + 2];
    wk3r = wk1r - 2 * wk2r * wk1i;
    wk3i = 2 * wk2r * wk1r - wk1i;
#pragma mta use 100 streams
#pragma mta assert no dependence
    for (j = k + m; j < k + m + l; j += 2) {
      resetA(a);
      btrfly(j, wk1r, wk1i, -wk2i, wk2r, wk3r, wk3i, a, b, c, d);
    }
  }
}
```