user: What would the C source look like for the assembly code provided here:

```asm
<cffti1>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x88,%rsp
  mov    %rdi,0x40(%rsp)
  mov    %rsi,%r14
  mov    %rdx,0x68(%rsp)
  test   %rdi,%rdi
  js     L68
  pxor   %xmm0,%xmm0
  cvtsi2sd %rdi,%xmm0
L56:
  movsd  D0(%rip),%xmm1
  divsd  %xmm0,%xmm1
  movsd  %xmm1,0x50(%rsp)
  mov    0x68(%rsp),%rbx
  mov    %rbx,%rcx
  mov    $0x5,%edx
  lea    D13(%rip),%rsi
  mov    0x40(%rsp),%rdi
  call   <factorize@plt>
  cmpq   $0x0,0x8(%rbx)
  je     L78
  movq   $0x1,0x38(%rsp)
  mov    $0x0,%r15d
  movq   $0x1,0x60(%rsp)
  mov    %r14,%rax
  mov    %r15,%r14
  mov    %rax,%r15
  jmp    L35
L68:
  mov    0x40(%rsp),%rdi
  mov    %rdi,%rax
  shr    %rax
  and    $0x1,%edi
  or     %rdi,%rax
  pxor   %xmm0,%xmm0
  cvtsi2sd %rax,%xmm0
  addsd  %xmm0,%xmm0
  jmp    L56
L125:
  mov    0x18(%rsp),%rdi
  mov    %rdi,%rax
  shr    %rax
  and    $0x1,%edi
  or     %rdi,%rax
  pxor   %xmm0,%xmm0
  cvtsi2sd %rax,%xmm0
  addsd  %xmm0,%xmm0
  jmp    L43
L22:
  mov    %rbx,%rax
  shr    %rax
  mov    %rbx,%rdx
  and    $0x1,%edx
  or     %rdx,%rax
  pxor   %xmm0,%xmm0
  cvtsi2sd %rax,%xmm0
  addsd  %xmm0,%xmm0
L129:
  mulsd  0x8(%rsp),%xmm0
  mov    %r12,%rdi
  call   <sincos@plt>
  movsd  0x70(%rsp),%xmm0
  movsd  %xmm0,0x0(%rbp)
  movsd  0x78(%rsp),%xmm0
  movsd  %xmm0,0x8(%rbp)
  add    $0x1,%rbx
  add    $0x10,%rbp
  cmp    %rbx,%r13
  jb     L145
L127:
  lea    0x70(%rsp),%rsi
  test   %rbx,%rbx
  js     L22
  pxor   %xmm0,%xmm0
  cvtsi2sd %rbx,%xmm0
  jmp    L129
L145:
  mov    0x58(%rsp),%rax
  lea    0x2(%rax,%r14,1),%r14
L71:
  cmpq   $0x6,0x20(%rsp)
  jbe    L31
  movsd  (%r15,%r14,8),%xmm0
  mov    0x28(%rsp),%rax
  movsd  %xmm0,(%rax)
  movsd  0x8(%r15,%r14,8),%xmm0
  mov    0x30(%rsp),%rax
  movsd  %xmm0,(%rax)
L31:
  addq   $0x1,0x10(%rsp)
  mov    0x10(%rsp),%rax
  mov    0x48(%rsp),%rcx
  add    %rcx,0x18(%rsp)
  cmp    %rax,0x20(%rsp)
  je     L9
L61:
  mov    0x18(%rsp),%rax
  test   %rax,%rax
  js     L125
  pxor   %xmm0,%xmm0
  cvtsi2sd %rax,%xmm0
L43:
  mulsd  0x50(%rsp),%xmm0
  movsd  %xmm0,0x8(%rsp)
  lea    0x0(,%r14,8),%rax
  lea    (%r15,%rax,1),%rcx
  mov    %rcx,0x28(%rsp)
  movsd  D10(%rip),%xmm4
  movsd  %xmm4,(%rcx)
  lea    0x8(%r15,%rax,1),%rcx
  mov    %rcx,0x30(%rsp)
  movq   $0x0,(%rcx)
  mov    0x40(%rsp),%rcx
  cmp    %rcx,0x38(%rsp)
  ja     L71
  lea    0x10(%r15,%rax,1),%rbp
  mov    $0x1,%ebx
  lea    0x78(%rsp),%r12
  jmp    L127
L9:
  mov    0x68(%rsp),%rax
  mov    0x60(%rsp),%rdx
  cmp    0x8(%rax),%rdx
  ja     L78
L35:
  addq   $0x1,0x60(%rsp)
  mov    0x60(%rsp),%rax
  mov    0x68(%rsp),%rdi
  mov    (%rdi,%rax,8),%rsi
  mov    %rsi,0x20(%rsp)
  mov    0x38(%rsp),%rax
  mov    %rax,%rdi
  mov    %rax,0x48(%rsp)
  imul   %rsi,%rax
  mov    %rax,%rcx
  mov    %rax,0x38(%rsp)
  mov    0x40(%rsp),%rax
  mov    $0x0,%edx
  div    %rcx
  mov    %rax,%r13
  cmp    $0x1,%rsi
  jbe    L9
  lea    -0x2(%rax,%rax,1),%rax
  lea    0x1(%r13),%rdx
  cmp    $0x1,%rdx
  mov    $0x0,%edx
  cmova  %rax,%rdx
  mov    %rdx,0x58(%rsp)
  mov    %rdi,0x18(%rsp)
  movq   $0x1,0x10(%rsp)
  jmp    L61
L78:
  add    $0x88,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

tool_calls: name: read_data
arguments: tag: D0
data_type: f64
name: read_data
arguments: tag: D13
data_type: string
name: read_data
arguments: tag: D10
data_type: byte[8]

tool: D0: 6.283185307179586

tool: D13: 

tool: {"D10": [0x00,0x00,0x00,0x00,0x00,0x00,0xf0,0x3f]}

assistant: ```c
void cffti1(size_t n, double wa[], size_t ifac[]) {
  static const size_t ntryh[5] = {4, 6, 3, 2, 5};
  static const double twopi = 6.28318530717958647692;
  size_t j, k, fi;
  double argh = twopi / n;
  size_t i = 0, l1 = 1;
  factorize(n, ntryh, 5, ifac);
  for (k = 1; k <= ifac[1]; k++) {
    size_t ip = ifac[k + 1];
    size_t ido = n / (l1 * ip);
    for (j = 1; j < ip; j++) {
      size_t is = i;
      double argld = j * l1 * argh;
      wa[i] = 1;
      wa[i + 1] = 0;
      for (fi = 1; fi <= ido; fi++) {
        double arg = fi * argld;
        i += 2;
        wa[i] = cos(arg);
        wa[i + 1] = sin(arg);
      }
      if (ip > 6) {
        wa[is] = wa[i];
        wa[is + 1] = wa[i + 1];
      }
    }
    l1 *= ip;
  }
}
```