user: 这段汇编代码用C语言表示是什么样的?

```asm
<transform_1d_even_l1>:
  endbr64
  push   %r15
  mov    %rdi,%r15
  push   %r14
  mov    %edx,%r14d
  push   %r13
  push   %r12
  push   %rbp
  mov    %edx,%ebp
  push   %rbx
  mov    %r8,%rbx
  sar    %ebp
  sub    $0xa8,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x98(%rsp)
  xor    %eax,%eax
  lea    0x50(%rsp),%r12
  mov    %ecx,0xc(%rsp)
  lea    0x10(%rsp),%r13
  mov    %r12,%r8
  mov    %rsi,(%rsp)
  call   <transform_1d_odd_l2@plt>
  mov    0xc(%rsp),%ecx
  mov    (%rsp),%rsi
  mov    %r13,%r8
  mov    %r14d,%edx
  mov    %r15,%rdi
  call   <transform_1d_even_l2@plt>
  mov    %ebp,%ecx
  shr    $0x1f,%ecx
  add    %ebp,%ecx
  sar    %ecx
  cmp    $0x1,%ebp
  jle    L166
  cmp    $0x7,%ebp
  jle    L83
  movdqa 0x10(%rsp),%xmm0
  mov    %ecx,%eax
  paddd  0x50(%rsp),%xmm0
  shr    $0x2,%eax
  movups %xmm0,(%rbx)
  cmp    $0x1,%eax
  je     L131
  movdqa 0x20(%rsp),%xmm0
  paddd  0x60(%rsp),%xmm0
  movups %xmm0,0x10(%rbx)
  cmp    $0x2,%eax
  je     L131
  movdqa 0x30(%rsp),%xmm0
  paddd  0x70(%rsp),%xmm0
  movups %xmm0,0x20(%rbx)
  cmp    $0x3,%eax
  je     L131
  movdqa 0x40(%rsp),%xmm0
  paddd  0x80(%rsp),%xmm0
  movups %xmm0,0x30(%rbx)
L131:
  mov    %ecx,%edx
  and    $0xfffffffc,%edx
  mov    %edx,%eax
  cmp    %edx,%ecx
  je     L166
L10:
  mov    %ecx,%esi
  sub    %edx,%esi
  cmp    $0x1,%esi
  je     L148
  lea    0x0(,%rdx,4),%rdi
  movq   0x10(%rsp,%rdi,1),%xmm0
  movq   0x50(%rsp,%rdi,1),%xmm1
  paddd  %xmm1,%xmm0
  movq   %xmm0,(%rbx,%rdx,4)
  mov    %esi,%edx
  and    $0xfffffffe,%edx
  add    %edx,%eax
  cmp    %edx,%esi
  je     L166
L148:
  cltq
  mov    0x50(%rsp,%rax,4),%edx
  add    0x10(%rsp,%rax,4),%edx
  mov    %edx,(%rbx,%rax,4)
L166:
  cmp    %ecx,%ebp
  jle    L184
  mov    %ebp,%esi
  lea    -0x1(%rbp),%eax
  sub    %ecx,%esi
  lea    -0x1(%rsi),%edx
  cmp    $0x2,%edx
  jbe    L19
  movslq %ecx,%rdx
  movslq %ebp,%rdi
  mov    %esi,%r8d
  sub    %rdx,%rdi
  shr    $0x2,%r8d
  lea    (%rbx,%rdx,4),%rdx
  lea    -0x10(,%rdi,4),%rdi
  add    %rdi,%r13
  add    %rdi,%r12
  movdqu 0x0(%r13),%xmm2
  movdqu (%r12),%xmm3
  pshufd $0x1b,%xmm2,%xmm0
  pshufd $0x1b,%xmm3,%xmm1
  psubd  %xmm1,%xmm0
  movups %xmm0,(%rdx)
  cmp    $0x1,%r8d
  je     L75
  movdqu -0x10(%r13),%xmm4
  movdqu -0x10(%r12),%xmm5
  pshufd $0x1b,%xmm4,%xmm0
  pshufd $0x1b,%xmm5,%xmm1
  psubd  %xmm1,%xmm0
  movups %xmm0,0x10(%rdx)
  cmp    $0x2,%r8d
  je     L75
  movdqu -0x20(%r13),%xmm6
  movdqu -0x20(%r12),%xmm7
  pshufd $0x1b,%xmm6,%xmm0
  pshufd $0x1b,%xmm7,%xmm1
  psubd  %xmm1,%xmm0
  movups %xmm0,0x20(%rdx)
  cmp    $0x3,%r8d
  je     L75
  movdqu -0x30(%r13),%xmm0
  movdqu -0x30(%r12),%xmm1
  pshufd $0x1b,%xmm0,%xmm0
  pshufd $0x1b,%xmm1,%xmm1
  psubd  %xmm1,%xmm0
  movups %xmm0,0x30(%rdx)
L75:
  mov    %esi,%edi
  and    $0xfffffffc,%edi
  lea    (%rdi,%rcx,1),%edx
  cmp    %esi,%edi
  je     L184
L62:
  sub    %edi,%esi
  cmp    $0x1,%esi
  je     L168
  movslq %ecx,%rcx
  movslq %ebp,%rbp
  sub    %rcx,%rbp
  add    %rdi,%rcx
  sub    %rdi,%rbp
  lea    -0x8(,%rbp,4),%r8
  movq   0x10(%rsp,%r8,1),%xmm0
  movq   0x50(%rsp,%r8,1),%xmm1
  pshufd $0xe1,%xmm0,%xmm0
  pshufd $0xe1,%xmm1,%xmm1
  psubd  %xmm1,%xmm0
  movq   %xmm0,(%rbx,%rcx,4)
  mov    %esi,%ecx
  and    $0xfffffffe,%ecx
  add    %ecx,%edx
  cmp    %ecx,%esi
  je     L184
L168:
  sub    %edx,%eax
  movslq %edx,%rdx
  cltq
  mov    0x10(%rsp,%rax,4),%ecx
  sub    0x50(%rsp,%rax,4),%ecx
  mov    %ecx,(%rbx,%rdx,4)
L184:
  mov    0x98(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L47
  add    $0xa8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L19:
  mov    %ecx,%edx
  xor    %edi,%edi
  jmp    L62
L83:
  xor    %edx,%edx
  xor    %eax,%eax
  jmp    L10
L47:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void transform_1d_even_l1(const int16_t *coeff, const int16_t *tr_matrix, int size, int j, int *out) {
  int i;
  int length = size >> 1;
  int e[16], o[16];
  transform_1d_odd_l2(coeff, tr_matrix, size, j, o);
  transform_1d_even_l2(coeff, tr_matrix, size, j, e);
  for (i = 0; i < length / 2; i++) {
    out[i] = e[i] + o[i];
  }
  for (i = length / 2; i < length; i++) {
    out[i] = e[length - 1 - i] - o[length - 1 - i];
  }
}
```