user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<_wordcopy_fwd_dest_aligned>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %rdx,-0x48(%rbp)
  mov    -0x40(%rbp),%rax
  and    $0x7,%eax
  shl    $0x3,%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x28(%rbp),%edx
  mov    $0x40,%eax
  sub    %edx,%eax
  mov    %eax,-0x24(%rbp)
  andq   $0xfffffffffffffff8,-0x40(%rbp)
  mov    -0x48(%rbp),%rax
  and    $0x3,%eax
  cmp    $0x3,%rax
  je     L11
  cmp    $0x3,%rax
  ja     L68
  cmp    $0x2,%rax
  je     L123
  cmp    $0x2,%rax
  ja     L68
  test   %rax,%rax
  je     L43
  cmp    $0x1,%rax
  je     L129
  jmp    L68
L123:
  mov    -0x40(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x40(%rbp),%rax
  add    $0x8,%rax
  mov    (%rax),%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x40(%rbp),%rax
  sub    $0x8,%rax
  mov    %rax,-0x40(%rbp)
  mov    -0x38(%rbp),%rax
  sub    $0x18,%rax
  mov    %rax,-0x38(%rbp)
  addq   $0x2,-0x48(%rbp)
  jmp    L146
L11:
  mov    -0x40(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x40(%rbp),%rax
  add    $0x8,%rax
  mov    (%rax),%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x38(%rbp),%rax
  sub    $0x10,%rax
  mov    %rax,-0x38(%rbp)
  addq   $0x1,-0x48(%rbp)
  jmp    L135
L43:
  cmpq   $0x0,-0x48(%rbp)
  je     L57
  mov    -0x40(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x8(%rbp)
  mov    -0x40(%rbp),%rax
  add    $0x8,%rax
  mov    (%rax),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x40(%rbp),%rax
  add    $0x8,%rax
  mov    %rax,-0x40(%rbp)
  mov    -0x38(%rbp),%rax
  sub    $0x8,%rax
  mov    %rax,-0x38(%rbp)
  jmp    L49
L129:
  mov    -0x40(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x40(%rbp),%rax
  add    $0x8,%rax
  mov    (%rax),%rax
  mov    %rax,-0x8(%rbp)
  mov    -0x40(%rbp),%rax
  add    $0x10,%rax
  mov    %rax,-0x40(%rbp)
  subq   $0x1,-0x48(%rbp)
  cmpq   $0x0,-0x48(%rbp)
  je     L9
  nop
  jmp    L68
L22:
  nop
L68:
  mov    -0x40(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x28(%rbp),%eax
  mov    -0x10(%rbp),%rdx
  mov    %rdx,%rsi
  mov    %eax,%ecx
  shl    %cl,%rsi
  mov    -0x24(%rbp),%eax
  mov    -0x8(%rbp),%rdx
  mov    %eax,%ecx
  shr    %cl,%rdx
  mov    -0x38(%rbp),%rax
  or     %rsi,%rdx
  mov    %rdx,(%rax)
L49:
  mov    -0x40(%rbp),%rax
  add    $0x8,%rax
  mov    (%rax),%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x28(%rbp),%eax
  mov    -0x8(%rbp),%rdx
  mov    %rdx,%rsi
  mov    %eax,%ecx
  shl    %cl,%rsi
  mov    -0x24(%rbp),%eax
  mov    -0x20(%rbp),%rdx
  mov    %eax,%ecx
  shr    %cl,%rdx
  mov    %rdx,%rcx
  mov    -0x38(%rbp),%rax
  add    $0x8,%rax
  mov    %rax,%rdx
  mov    %rsi,%rax
  or     %rcx,%rax
  mov    %rax,(%rdx)
L135:
  mov    -0x40(%rbp),%rax
  add    $0x10,%rax
  mov    (%rax),%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x28(%rbp),%eax
  mov    -0x20(%rbp),%rdx
  mov    %rdx,%rsi
  mov    %eax,%ecx
  shl    %cl,%rsi
  mov    -0x24(%rbp),%eax
  mov    -0x18(%rbp),%rdx
  mov    %eax,%ecx
  shr    %cl,%rdx
  mov    %rdx,%rcx
  mov    -0x38(%rbp),%rax
  add    $0x10,%rax
  mov    %rax,%rdx
  mov    %rsi,%rax
  or     %rcx,%rax
  mov    %rax,(%rdx)
L146:
  mov    -0x40(%rbp),%rax
  add    $0x18,%rax
  mov    (%rax),%rax
  mov    %rax,-0x8(%rbp)
  mov    -0x28(%rbp),%eax
  mov    -0x18(%rbp),%rdx
  mov    %rdx,%rsi
  mov    %eax,%ecx
  shl    %cl,%rsi
  mov    -0x24(%rbp),%eax
  mov    -0x10(%rbp),%rdx
  mov    %eax,%ecx
  shr    %cl,%rdx
  mov    %rdx,%rcx
  mov    -0x38(%rbp),%rax
  add    $0x18,%rax
  mov    %rax,%rdx
  mov    %rsi,%rax
  or     %rcx,%rax
  mov    %rax,(%rdx)
  mov    -0x40(%rbp),%rax
  add    $0x20,%rax
  mov    %rax,-0x40(%rbp)
  mov    -0x38(%rbp),%rax
  add    $0x20,%rax
  mov    %rax,-0x38(%rbp)
  subq   $0x4,-0x48(%rbp)
  cmpq   $0x0,-0x48(%rbp)
  jne    L22
  jmp    L56
L9:
  nop
L56:
  mov    -0x28(%rbp),%eax
  mov    -0x10(%rbp),%rdx
  mov    %rdx,%rsi
  mov    %eax,%ecx
  shl    %cl,%rsi
  mov    -0x24(%rbp),%eax
  mov    -0x8(%rbp),%rdx
  mov    %eax,%ecx
  shr    %cl,%rdx
  mov    -0x38(%rbp),%rax
  or     %rsi,%rdx
  mov    %rdx,(%rax)
  jmp    L105
L57:
  nop
L105:
  pop    %rbp
  ret
```

assistant: ```c
void _wordcopy_fwd_dest_aligned(long int dstp, long int srcp, size_t len) {
  unsigned long int a0, a1, a2, a3;
  int sh_1, sh_2;
  sh_1 = 8 * (srcp % (sizeof(unsigned long int)));
  sh_2 = 8 * (sizeof(unsigned long int)) - sh_1;
  srcp &= -(sizeof(unsigned long int));
  switch (len % 4) {
  case 2:
    a1 = ((unsigned long int *)srcp)[0];
    a2 = ((unsigned long int *)srcp)[1];
    srcp -= 1 * (sizeof(unsigned long int));
    dstp -= 3 * (sizeof(unsigned long int));
    len += 2;
    goto do1;
  case 3:
    a0 = ((unsigned long int *)srcp)[0];
    a1 = ((unsigned long int *)srcp)[1];
    srcp -= 0 * (sizeof(unsigned long int));
    dstp -= 2 * (sizeof(unsigned long int));
    len += 1;
    goto do2;
  case 0:
    if (16 <= 3 * (sizeof(unsigned long int)) && len == 0)
      return;
    a3 = ((unsigned long int *)srcp)[0];
    a0 = ((unsigned long int *)srcp)[1];
    srcp -= -1 * (sizeof(unsigned long int));
    dstp -= 1 * (sizeof(unsigned long int));
    len += 0;
    goto do3;
  case 1:
    a2 = ((unsigned long int *)srcp)[0];
    a3 = ((unsigned long int *)srcp)[1];
    srcp -= -2 * (sizeof(unsigned long int));
    dstp -= 0 * (sizeof(unsigned long int));
    len -= 1;
    if (16 <= 3 * (sizeof(unsigned long int)) && len == 0)
      goto do0;
    goto do4;
  }
  do {
  do4:
    a0 = ((unsigned long int *)srcp)[0];
    ((unsigned long int *)dstp)[0] = (((a2) << (sh_1)) | ((a3) >> (sh_2)));
  do3:
    a1 = ((unsigned long int *)srcp)[1];
    ((unsigned long int *)dstp)[1] = (((a3) << (sh_1)) | ((a0) >> (sh_2)));
  do2:
    a2 = ((unsigned long int *)srcp)[2];
    ((unsigned long int *)dstp)[2] = (((a0) << (sh_1)) | ((a1) >> (sh_2)));
  do1:
    a3 = ((unsigned long int *)srcp)[3];
    ((unsigned long int *)dstp)[3] = (((a1) << (sh_1)) | ((a2) >> (sh_2)));
    srcp += 4 * (sizeof(unsigned long int));
    dstp += 4 * (sizeof(unsigned long int));
    len -= 4;
  } while (len != 0);
do0:
  ((unsigned long int *)dstp)[0] = (((a2) << (sh_1)) | ((a3) >> (sh_2)));
}
```