user: Translate the below assembly code into C programming language:

```asm
<fftixb>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    %edx,-0x24(%rbp)
  mov    %ecx,-0x28(%rbp)
  mov    -0x28(%rbp),%eax
  cmp    -0x24(%rbp),%eax
  jle    L57
  mov    -0x28(%rbp),%eax
  sub    -0x24(%rbp),%eax
  cltq
  shl    $0x2,%eax
  mov    %eax,%edx
  mov    -0x24(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x20(%rbp),%rax
  add    %rcx,%rax
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <memset@plt>
L57:
  mov    -0x28(%rbp),%eax
  cltq
  shl    $0x3,%eax
  mov    %eax,%edx
  mov    -0x18(%rbp),%rax
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  mov    -0x28(%rbp),%eax
  add    %eax,%eax
  sub    $0x1,%eax
  mov    %eax,-0x8(%rbp)
  movl   $0x0,-0xc(%rbp)
  jmp    L31
L5:
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rax,%rdx
  mov    -0x8(%rbp),%eax
  sub    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x18(%rbp),%rax
  add    %rcx,%rax
  movss  (%rdx),%xmm0
  movss  %xmm0,(%rax)
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm0
  mov    -0x8(%rbp),%eax
  sub    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  movss  D4(%rip),%xmm1
  xorps  %xmm1,%xmm0
  movss  %xmm0,(%rax)
  addl   $0x1,-0xc(%rbp)
L31:
  mov    -0xc(%rbp),%eax
  cmp    -0x28(%rbp),%eax
  jl     L5
  mov    -0x28(%rbp),%eax
  lea    (%rax,%rax,1),%edi
  mov    -0x20(%rbp),%rdx
  mov    -0x18(%rbp),%rcx
  mov    D5(%rip),%rax
  mov    %rcx,%rsi
  movq   %rax,%xmm0
  call   <fft@plt>
  movl   $0x0,-0xc(%rbp)
  jmp    L43
L30:
  mov    -0xc(%rbp),%edx
  mov    -0x28(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rax,%rdx
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x18(%rbp),%rax
  add    %rcx,%rax
  movss  (%rdx),%xmm0
  movss  %xmm0,(%rax)
  mov    -0xc(%rbp),%edx
  mov    -0x28(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x20(%rbp),%rax
  add    %rax,%rdx
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x20(%rbp),%rax
  add    %rcx,%rax
  movss  (%rdx),%xmm0
  movss  %xmm0,(%rax)
  addl   $0x1,-0xc(%rbp)
L43:
  mov    -0xc(%rbp),%eax
  cmp    -0x28(%rbp),%eax
  jl     L30
  pxor   %xmm1,%xmm1
  cvtsi2sdl -0x28(%rbp),%xmm1
  movsd  D8(%rip),%xmm0
  divsd  %xmm1,%xmm0
  cvtsd2ss %xmm0,%xmm0
  movss  %xmm0,-0x4(%rbp)
  movl   $0x0,-0xc(%rbp)
  jmp    L21
L55:
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm0
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mulss  -0x4(%rbp),%xmm0
  movss  %xmm0,(%rax)
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  movss  (%rax),%xmm0
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  mulss  -0x4(%rbp),%xmm0
  movss  %xmm0,(%rax)
  addl   $0x1,-0xc(%rbp)
L21:
  mov    -0xc(%rbp),%eax
  cmp    -0x28(%rbp),%eax
  jl     L55
  mov    -0x28(%rbp),%eax
  leave
  ret
```

tool_calls: name: extract_symbolic_data
arguments: data_label: D4
datatype: byte[4]
name: extract_symbolic_data
arguments: data_label: D5
datatype: byte[8]
name: extract_symbolic_data
arguments: data_label: D8
datatype: f64

tool: {"D4": [0x00,0x00,0x00,0x80]}

tool: {"D5": [0x00,0x00,0x00,0x00,0x00,0x00,0xf0,0xbf]}

tool: D8: 1

assistant: ```c
int fftixb(float *xrr, float *xri, int isize, int ntot) {
  int i, ntotp1;
  float scale;
  if (ntot > isize)
    memset(xri + isize, 0, sizeof(float) * (ntot - isize));
  memset(xrr, 0, sizeof(float) * ntot * 2);
  ntotp1 = 2 * ntot - 1;
  for (i = 0; i < ntot; i++) {
    xrr[ntotp1 - i] = xrr[i];
    xri[ntotp1 - i] = -xri[i];
  }
  fft(-1.0, ntot * 2, xrr, xri);
  for (i = 0; i < ntot; i++) {
    xrr[i] = xrr[i + ntot];
    xri[i] = xri[i + ntot];
  }
  scale = 1.0 / ntot;
  for (i = 0; i < ntot; i++) {
    xrr[i] *= scale;
    xri[i] *= scale;
  }
  return ntot;
}
```