user: Converte this assembly snippet into its equivalent C code:

```asm
<dftixb>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rdi,%rbx
  mov    %rsi,%rbp
  mov    %ecx,%r14d
  mov    %r8,0x8(%rsp)
  mov    %r9,%r15
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  cmp    %edx,%ecx
  jg     L45
L27:
  movslq %r14d,%r13
  lea    0x0(,%r14,8),%edx
  mov    $0x0,%esi
  mov    %rbx,%rdi
  call   <memset@plt>
  lea    (%r14,%r14,1),%ecx
  lea    -0x1(%rcx),%edx
  test   %r14d,%r14d
  jle    L29
  movslq %edx,%rdx
  shl    $0x2,%rdx
  mov    %r14d,%r12d
  mov    $0x0,%eax
  movss  D1(%rip),%xmm1
L6:
  movss  (%rbx,%rax,4),%xmm0
  movss  %xmm0,(%rbx,%rdx,1)
  movss  0x0(%rbp,%rax,4),%xmm0
  xorps  %xmm1,%xmm0
  movss  %xmm0,0x0(%rbp,%rdx,1)
  add    $0x1,%rax
  sub    $0x4,%rdx
  cmp    %r12,%rax
  jne    L6
  mov    %ecx,0x14(%rsp)
  lea    0x14(%rsp),%rdx
  push   %r15
  push   0x10(%rsp)
  mov    $0x0,%r9d
  mov    $0x0,%r8d
  mov    $0x1,%ecx
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  call   <fourt@plt>
  shl    $0x2,%r13
  lea    (%rbx,%r13,1),%rdx
  add    %rbp,%r13
  add    $0x10,%rsp
  mov    $0x0,%eax
L32:
  movss  (%rdx,%rax,4),%xmm0
  movss  %xmm0,(%rbx,%rax,4)
  movss  0x0(%r13,%rax,4),%xmm0
  movss  %xmm0,0x0(%rbp,%rax,4)
  add    $0x1,%rax
  cmp    %r12,%rax
  jne    L32
  pxor   %xmm1,%xmm1
  cvtsi2sd %r14d,%xmm1
  movsd  D17(%rip),%xmm0
  divsd  %xmm1,%xmm0
  cvtsd2ss %xmm0,%xmm0
  mov    $0x0,%eax
L50:
  movaps %xmm0,%xmm1
  mulss  (%rbx,%rax,4),%xmm1
  movss  %xmm1,(%rbx,%rax,4)
  movaps %xmm0,%xmm1
  mulss  0x0(%rbp,%rax,4),%xmm1
  movss  %xmm1,0x0(%rbp,%rax,4)
  add    $0x1,%rax
  cmp    %r12,%rax
  jne    L50
L79:
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L14
  mov    %r14d,%eax
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L45:
  mov    %ecx,%eax
  sub    %edx,%eax
  shl    $0x2,%eax
  movslq %edx,%rdx
  lea    (%rsi,%rdx,4),%rdi
  mov    %eax,%edx
  mov    $0x0,%esi
  call   <memset@plt>
  jmp    L27
L29:
  mov    %ecx,0x14(%rsp)
  lea    0x14(%rsp),%rdx
  push   %r15
  push   0x10(%rsp)
  mov    $0x0,%r9d
  mov    $0x0,%r8d
  mov    $0x1,%ecx
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  call   <fourt@plt>
  add    $0x10,%rsp
  jmp    L79
L14:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: data_tag: D1
data_type: byte[4]
name: retrieve_data
arguments: data_tag: D17
data_type: f64

tool: {"D1": [0x00,0x00,0x00,0x80]}

tool: D17: 1

assistant: ```c
int dftixb(float *xrr, float *xri, int isize, int ntot, float *workr, float *worki) {
  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];
  }
  ntotp1 = ntot * 2;
  fourt(xrr, xri, &ntotp1, 1, 0, 0, workr, worki);
  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;
}
```