user: 下面的汇编指令对应的C源代码是什么:

```asm
<bzero_5>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    -0x20(%rbp),%rax
  and    $0xffffffffffffffc0,%rax
  mov    %rax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x8(%rbp)
  mov    $0x0,%eax
  call   <_mm_setzero_si128@plt>
  mov    %eax,-0xc(%rbp)
  mov    -0x18(%rbp),%rax
  cmp    -0x8(%rbp),%rax
  je     L143
L131:
  mov    -0xc(%rbp),%edx
  mov    -0x18(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  call   <_mm_storeu_si128@plt>
  mov    -0x18(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    -0xc(%rbp),%eax
  mov    %eax,%esi
  mov    %rdx,%rdi
  call   <_mm_storeu_si128@plt>
  mov    -0x18(%rbp),%rax
  lea    0x8(%rax),%rdx
  mov    -0xc(%rbp),%eax
  mov    %eax,%esi
  mov    %rdx,%rdi
  call   <_mm_storeu_si128@plt>
  mov    -0x18(%rbp),%rax
  lea    0xc(%rax),%rdx
  mov    -0xc(%rbp),%eax
  mov    %eax,%esi
  mov    %rdx,%rdi
  call   <_mm_storeu_si128@plt>
  addq   $0x40,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  cmp    -0x8(%rbp),%rax
  jb     L131
  mov    -0x20(%rbp),%rax
  and    $0x3f,%eax
  test   %rax,%rax
  jne    L63
  jmp    L129
L143:
  cmpq   $0x0,-0x20(%rbp)
  je     L121
L63:
  mov    -0x20(%rbp),%rax
  and    $0x20,%eax
  test   %rax,%rax
  je     L51
  mov    -0xc(%rbp),%edx
  mov    -0x18(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  call   <_mm_storeu_si128@plt>
  mov    -0x18(%rbp),%rax
  lea    0x4(%rax),%rdx
  mov    -0xc(%rbp),%eax
  mov    %eax,%esi
  mov    %rdx,%rdi
  call   <_mm_storeu_si128@plt>
  mov    -0x20(%rbp),%rax
  and    $0x1f,%eax
  test   %rax,%rax
  je     L122
  addq   $0x20,-0x18(%rbp)
L51:
  mov    -0x20(%rbp),%rax
  and    $0x10,%eax
  test   %rax,%rax
  je     L101
  mov    -0xc(%rbp),%edx
  mov    -0x18(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  call   <_mm_storeu_si128@plt>
  mov    -0x20(%rbp),%rax
  and    $0xf,%eax
  test   %rax,%rax
  je     L2
  addq   $0x10,-0x18(%rbp)
L101:
  mov    -0x20(%rbp),%rax
  and    $0x8,%eax
  test   %rax,%rax
  je     L102
  mov    -0x18(%rbp),%rax
  movq   $0x0,(%rax)
  mov    -0x20(%rbp),%rax
  and    $0x7,%eax
  test   %rax,%rax
  je     L8
  addq   $0x8,-0x18(%rbp)
L102:
  mov    -0x20(%rbp),%rax
  and    $0x4,%eax
  test   %rax,%rax
  je     L168
  mov    -0x18(%rbp),%rax
  movq   $0x0,(%rax)
  mov    -0x20(%rbp),%rax
  and    $0x3,%eax
  test   %rax,%rax
  je     L137
  addq   $0x4,-0x18(%rbp)
L168:
  mov    -0x20(%rbp),%rax
  and    $0x2,%eax
  test   %rax,%rax
  je     L181
  mov    -0x18(%rbp),%rax
  movq   $0x0,(%rax)
  mov    -0x20(%rbp),%rax
  and    $0x1,%eax
  test   %rax,%rax
  je     L64
  addq   $0x2,-0x18(%rbp)
L181:
  mov    -0x18(%rbp),%rax
  movq   $0x0,(%rax)
  jmp    L129
L121:
  nop
  jmp    L129
L122:
  nop
  jmp    L129
L2:
  nop
  jmp    L129
L8:
  nop
  jmp    L129
L137:
  nop
  jmp    L129
L64:
  nop
L129:
  leave
  ret
```

assistant: ```c
void bzero_5(char *s, size_t n) {
  char *e = s + (n & ~63);
  __m128i zero = _mm_setzero_si128();
  if (s != e) {
#pragma clang loop unroll(disable)
    do {
      _mm_storeu_si128(&(((__m128i *)s)[0]), zero);
      _mm_storeu_si128(&(((__m128i *)s)[1]), zero);
      _mm_storeu_si128(&(((__m128i *)s)[2]), zero);
      _mm_storeu_si128(&(((__m128i *)s)[3]), zero);
      s += 64;
    } while (s < e);
    if ((n & 63) == 0)
      return;
  } else {
    if (n == 0)
      return;
  }
  if ((n & 32) != 0) {
    _mm_storeu_si128(&(((__m128i *)s)[0]), zero);
    _mm_storeu_si128(&(((__m128i *)s)[1]), zero);
    if ((n & 31) == 0)
      return;
    s += 32;
  }
  if ((n & 16) != 0) {
    _mm_storeu_si128(&(((__m128i *)s)[0]), zero);
    if ((n & 15) == 0)
      return;
    s += 16;
  }
  if ((n & 8) != 0) {
    ((int64_t *)s)[0] = 0;
    if ((n & 7) == 0)
      return;
    s += 8;
  }
  if ((n & 4) != 0) {
    ((int32_t *)s)[0] = 0;
    if ((n & 3) == 0)
      return;
    s += 4;
  }
  if ((n & 2) != 0) {
    ((int16_t *)s)[0] = 0;
    if ((n & 1) == 0)
      return;
    s += 2;
  }
  ((int8_t *)s)[0] = 0;
}
```