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

```asm
<fn_invUniversalRecursiveFWT>:
  endbr64
  push   %rbp
  mov    %r8,%r10
  mov    %rsp,%rbp
  push   %r15
  mov    %r9,%r15
  push   %r14
  mov    %rsi,%r14
  push   %r13
  mov    %edx,%r13d
  shr    %edx
  push   %r12
  mov    %edx,%esi
  mov    %rdi,%r12
  push   %rbx
  shl    $0x2,%rsi
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  lea    0xf(%rsi),%rax
  mov    %rsp,%rdi
  shr    $0x4,%rax
  shl    $0x4,%rax
  mov    %rax,%r8
  and    $0xfffffffffffff000,%r8
  sub    %r8,%rdi
  cmp    %rdi,%rsp
  je     L88
L53:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rdi,%rsp
  jne    L53
L88:
  and    $0xfff,%eax
  sub    %rax,%rsp
  test   %rax,%rax
  jne    L65
  mov    %rsp,%rbx
  test   %ecx,%ecx
  je     L70
L0:
  add    %r14,%rsi
  lea    0x0(,%rdx,4),%r11d
  cmp    $0x1,%ecx
  je     L40
  mov    0x10(%rbp),%eax
  sub    $0x8,%rsp
  mov    %r10,%r8
  mov    %r15,%r9
  sub    $0x1,%ecx
  mov    %r12,%rdi
  mov    %r11d,-0x48(%rbp)
  push   %rax
  mov    %r10,-0x50(%rbp)
  call   <fn_invUniversalRecursiveFWT>
  mov    -0x48(%rbp),%edx
  xor    %esi,%esi
  mov    %rbx,%rdi
  call   <memset@plt>
  lea    0x0(%r13,%r13,1),%edx
  mov    %r12,%rsi
  mov    %rbx,%rdi
  mov    %edx,-0x48(%rbp)
  call   <memcpy@plt>
  mov    -0x48(%rbp),%edx
  xor    %esi,%esi
  mov    %r12,%rdi
  call   <memset@plt>
  mov    0x10(%rbp),%r8d
  mov    -0x50(%rbp),%rcx
  mov    %r13d,%edx
  mov    %r14,%rsi
  mov    %r12,%rdi
  call   <fn_WTconformAndUpsemplerBy2@plt>
  mov    0x10(%rbp),%r8d
  mov    %r13d,%edx
  mov    %r15,%rcx
  mov    %rbx,%rsi
  mov    %r12,%rdi
  call   <fn_WTconformAndUpsemplerBy2@plt>
  pop    %rax
  pop    %rdx
L70:
  mov    -0x38(%rbp),%rax
  sub    %fs:0x28,%rax
  jne    L57
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
  nopw   0x0(%rax,%rax,1)
L65:
  orq    $0x0,-0x8(%rsp,%rax,1)
  mov    %rsp,%rbx
  test   %ecx,%ecx
  jne    L0
  jmp    L70
  nopl   0x0(%rax,%rax,1)
L40:
  mov    %r11d,%edx
  mov    %rbx,%rdi
  mov    %r10,-0x48(%rbp)
  call   <memcpy@plt>
  mov    0x10(%rbp),%r8d
  mov    -0x48(%rbp),%rcx
  mov    %r13d,%edx
  mov    %r14,%rsi
  mov    %r12,%rdi
  call   <fn_WTconformAndUpsemplerBy2@plt>
  mov    0x10(%rbp),%r8d
  mov    %r15,%rcx
  mov    %r13d,%edx
  mov    %rbx,%rsi
  mov    %r12,%rdi
  call   <fn_WTconformAndUpsemplerBy2@plt>
  jmp    L70
L57:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void fn_invUniversalRecursiveFWT(float *a_da, float *p_ka, const unsigned int const cuci_N, unsigned int cuic_w, float *p2tf_HPF, float *p2tf_LPF, const unsigned int const cuic_ord) {
  float a_buff[cuci_N >> 1];
  if (cuic_w == 0) {
    return;
  }
  if ((cuic_w - 1) == 0) {
    memcpy(a_buff, &p_ka[cuci_N >> 1], sizeof(a_buff));
    fn_WTconformAndUpsemplerBy2(a_da, p_ka, cuci_N, p2tf_HPF, cuic_ord);
    fn_WTconformAndUpsemplerBy2(a_da, a_buff, cuci_N, p2tf_LPF, cuic_ord);
    return;
  }
  fn_invUniversalRecursiveFWT(a_da, &p_ka[cuci_N >> 1], (cuci_N >> 1), (cuic_w - 1), p2tf_HPF, p2tf_LPF, cuic_ord);
  memset(a_buff, 0, sizeof(a_buff));
  memcpy(a_buff, a_da, (sizeof(float) * cuci_N) >> 1);
  memset(a_da, 0, (sizeof(float) * cuci_N) >> 1);
  fn_WTconformAndUpsemplerBy2(a_da, p_ka, cuci_N, p2tf_HPF, cuic_ord);
  fn_WTconformAndUpsemplerBy2(a_da, a_buff, cuci_N, p2tf_LPF, cuic_ord);
  return;
}
```