user: 下面的汇编指令对应的C源代码是什么：

```asm
<bzero_5>:
  endbr64
  push   %r15
  mov    %rsi,%r15
  xor    %eax,%eax
  push   %r14
  and    $0xffffffffffffffc0,%r15
  mov    %rdi,%r14
  push   %r13
  mov    %rsi,%r13
  push   %r12
  lea    (%rdi,%r15,1),%r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  call   <_mm_setzero_si128@plt>
  mov    %eax,%ebp
  cmp    %r12,%r14
  je     L55
  mov    %r14,%rbx
  nopl   0x0(%rax,%rax,1)
L138:
  mov    %rbx,%rdi
  mov    %ebp,%esi
  call   <_mm_storeu_si128@plt>
  lea    0x4(%rbx),%rdi
  mov    %ebp,%esi
  call   <_mm_storeu_si128@plt>
  lea    0x8(%rbx),%rdi
  mov    %ebp,%esi
  call   <_mm_storeu_si128@plt>
  lea    0xc(%rbx),%rdi
  mov    %ebp,%esi
  add    $0x40,%rbx
  call   <_mm_storeu_si128@plt>
  cmp    %rbx,%r12
  ja     L138
  lea    0x1(%r14),%rax
  cmp    %rax,%r12
  mov    $0x40,%eax
  cmovb  %rax,%r15
  lea    (%r14,%r15,1),%r12
  test   $0x3f,%r13b
  je     L183
  test   $0x20,%r13b
  jne    L126
L74:
  test   $0x10,%r13b
  jne    L131
L113:
  test   $0x8,%r13b
  jne    L18
L60:
  test   $0x4,%r13b
  je     L130
  movq   $0x0,(%r12)
  test   $0x3,%r13b
  je     L183
  add    $0x4,%r12
L130:
  test   $0x2,%r13b
  je     L145
  and    $0x1,%r13d
  movq   $0x0,(%r12)
  je     L183
  add    $0x2,%r12
L145:
  movq   $0x0,(%r12)
L183:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax,%rax,1)
L18:
  movq   $0x0,(%r12)
  test   $0x7,%r13b
  je     L183
  add    $0x8,%r12
  jmp    L60
  nopl   0x0(%rax)
L126:
  mov    %ebp,%esi
  mov    %r12,%rdi
  call   <_mm_storeu_si128@plt>
  lea    0x4(%r12),%rdi
  mov    %ebp,%esi
  call   <_mm_storeu_si128@plt>
  test   $0x1f,%r13b
  je     L183
  add    $0x20,%r12
  test   $0x10,%r13b
  je     L113
  jmp    L131
  nopl   0x0(%rax)
L55:
  test   %r13,%r13
  je     L183
  test   $0x20,%r13b
  je     L74
  jmp    L126
  nopl   0x0(%rax)
L131:
  mov    %ebp,%esi
  mov    %r12,%rdi
  call   <_mm_storeu_si128@plt>
  test   $0xf,%r13b
  je     L183
  add    $0x10,%r12
  test   $0x8,%r13b
  je     L60
  jmp    L18
```

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;
}
```