user: 这段汇编代码用C语言表示是什么样的：

```asm
<dwt2>:
  endbr64
  push   %r15
  push   %r14
  mov    %ecx,%r14d
  push   %r13
  mov    %rdi,%r13
  push   %r12
  mov    %r9d,%r12d
  push   %rbp
  push   %rbx
  mov    %r8d,%ebx
  sub    $0x38,%rsp
  mov    %rsi,0x20(%rsp)
  movslq 0x70(%rsp),%rbp
  mov    %rdx,0x28(%rsp)
  test   %r9d,%r9d
  jle    L156
  mov    %r8d,%eax
  mov    %r9d,0xc(%rsp)
  xor    %r15d,%r15d
  mov    %ebp,%r9d
  imul   %ebp,%eax
  mov    %rdx,%r12
  mov    %rsi,%rbp
  cltq
  shl    $0x2,%rax
  mov    %rax,0x10(%rsp)
  mov    0x78(%rsp),%eax
  imul   %r8d,%eax
  cltq
  shl    $0x2,%rax
  mov    %rax,0x18(%rsp)
  nopl   0x0(%rax,%rax,1)
L56:
  sub    $0x8,%rsp
  mov    %rbp,%rsi
  mov    %r14d,%ecx
  mov    %r12,%rdx
  mov    0x80(%rsp),%eax
  mov    %ebx,%r8d
  mov    %r13,%rdi
  add    $0x1,%r15d
  push   %rax
  mov    %r9d,0x80(%rsp)
  call   <dwt@plt>
  add    0x20(%rsp),%rbp
  add    0x28(%rsp),%r12
  pop    %rcx
  pop    %rsi
  cmp    %r15d,0xc(%rsp)
  mov    0x70(%rsp),%r9d
  jne    L56
  mov    0xc(%rsp),%r12d
  movslq %r9d,%rbp
L156:
  mov    %r12d,%edx
  imul   %ebx,%edx
  test   %edx,%edx
  jle    L75
  cmp    $0x1,%ebp
  jne    L21
  cmpl   $0x1,0x78(%rsp)
  jne    L21
  mov    0x20(%rsp),%rsi
  mov    0x28(%rsp),%rdi
  lea    0x4(%rsi),%rcx
  mov    %rdi,%rax
  sub    %rcx,%rax
  cmp    $0x8,%rax
  jbe    L132
  lea    -0x1(%rdx),%eax
  cmp    $0x2,%eax
  jbe    L132
  mov    %edx,%ecx
  xor    %eax,%eax
  shr    $0x2,%ecx
  shl    $0x4,%rcx
  nopl   0x0(%rax,%rax,1)
L1:
  movups (%rsi,%rax,1),%xmm1
  movups %xmm1,(%rdi,%rax,1)
  add    $0x10,%rax
  cmp    %rcx,%rax
  jne    L1
  mov    %edx,%eax
  and    $0xfffffffc,%eax
  test   $0x3,%dl
  je     L75
  mov    0x20(%rsp),%rdi
  mov    %eax,%esi
  mov    0x28(%rsp),%r10
  lea    0x0(,%rsi,4),%rcx
  movss  (%rdi,%rsi,4),%xmm0
  movss  %xmm0,(%r10,%rsi,4)
  lea    0x1(%rax),%esi
  cmp    %edx,%esi
  jge    L75
  movss  0x4(%rdi,%rcx,1),%xmm0
  add    $0x2,%eax
  movss  %xmm0,0x4(%r10,%rcx,1)
  cmp    %eax,%edx
  jle    L75
  movss  0x8(%rdi,%rcx,1),%xmm0
  movss  %xmm0,0x8(%r10,%rcx,1)
L75:
  test   %ebx,%ebx
  jle    L32
  mov    0x78(%rsp),%eax
  mov    %ebx,%r9d
  mov    0x20(%rsp),%rsi
  mov    %r12d,%r8d
  imul   %ebp,%r9d
  mov    0x28(%rsp),%r15
  mov    %ebx,0x28(%rsp)
  imul   %ebx,%eax
  mov    %rsi,%rbx
  mov    %r9d,%r12d
  mov    %eax,0x10(%rsp)
  lea    0x0(,%rbp,4),%rax
  xor    %ebp,%ebp
  mov    %rax,0x18(%rsp)
  movslq 0x78(%rsp),%rax
  shl    $0x2,%rax
  mov    %rax,0x20(%rsp)
  nopl   0x0(%rax,%rax,1)
L35:
  sub    $0x8,%rsp
  mov    %r15,%rdx
  mov    %rbx,%rsi
  mov    %r12d,%r9d
  mov    0x18(%rsp),%eax
  mov    %r14d,%ecx
  mov    %r13,%rdi
  add    $0x1,%ebp
  push   %rax
  mov    %r8d,0x1c(%rsp)
  call   <dwt@plt>
  add    0x28(%rsp),%rbx
  add    0x30(%rsp),%r15
  pop    %rax
  pop    %rdx
  cmp    %ebp,0x28(%rsp)
  mov    0xc(%rsp),%r8d
  jne    L35
L32:
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax,%rax,1)
L21:
  movslq 0x78(%rsp),%rdi
  movslq %ebp,%r8
  mov    0x20(%rsp),%rsi
  xor    %eax,%eax
  mov    0x28(%rsp),%rcx
  shl    $0x2,%r8
  shl    $0x2,%rdi
  nopl   0x0(%rax)
L63:
  movss  (%rsi),%xmm0
  add    $0x1,%eax
  add    %r8,%rsi
  movss  %xmm0,(%rcx)
  add    %rdi,%rcx
  cmp    %edx,%eax
  jne    L63
  jmp    L75
  nopw   0x0(%rax,%rax,1)
L132:
  mov    0x20(%rsp),%rcx
  mov    0x28(%rsp),%rsi
  xor    %eax,%eax
  nopl   0x0(%rax)
L114:
  movss  (%rcx,%rax,4),%xmm0
  movss  %xmm0,(%rsi,%rax,4)
  add    $0x1,%rax
  cmp    %rdx,%rax
  jne    L114
  jmp    L75
```

assistant: ```c
void dwt2(void (*wavelet)(float *, float *, int, int, int), float *out, float *in, int N0, int W, int H, int SO, int SI) {
  for (int i = 0; i < H; ++i)
    dwt(wavelet, out + SO * W * i, in + SI * W * i, N0, W, SO, SI);
  for (int i = 0; i < W * H; ++i)
    in[i * SI] = out[i * SO];
  for (int i = 0; i < W; ++i)
    dwt(wavelet, out + SO * i, in + SI * i, N0, H, SO * W, SI * W);
}
```