user: 这段汇编代码用C语言表示是什么样的?

```asm
<timingsafe_bcmp>:
  endbr64
  mov    %rdi,%rcx
  mov    %rdx,%rdi
  test   %rdx,%rdx
  je     L167
  lea    -0x1(%rdx),%rax
  cmp    $0xe,%rax
  jbe    L44
  and    $0xfffffffffffffff0,%rdx
  pxor   %xmm3,%xmm3
  pxor   %xmm4,%xmm4
  xor    %eax,%eax
  pxor   %xmm2,%xmm2
  nopl   0x0(%rax,%rax,1)
L172:
  movdqu (%rcx,%rax,1),%xmm0
  movdqu (%rsi,%rax,1),%xmm6
  add    $0x10,%rax
  pxor   %xmm6,%xmm0
  movdqa %xmm0,%xmm1
  punpckhbw %xmm4,%xmm0
  movdqa %xmm0,%xmm5
  punpcklbw %xmm4,%xmm1
  punpckhwd %xmm2,%xmm0
  punpcklwd %xmm2,%xmm5
  por    %xmm5,%xmm0
  movdqa %xmm1,%xmm5
  punpckhwd %xmm2,%xmm1
  punpcklwd %xmm2,%xmm5
  por    %xmm5,%xmm1
  por    %xmm1,%xmm0
  por    %xmm0,%xmm3
  cmp    %rdx,%rax
  jne    L172
  movdqa %xmm3,%xmm0
  mov    %rdi,%rdx
  psrldq $0x8,%xmm0
  and    $0xfffffffffffffff0,%rdx
  por    %xmm0,%xmm3
  movdqa %xmm3,%xmm0
  psrldq $0x4,%xmm0
  por    %xmm0,%xmm3
  movd   %xmm3,%eax
  test   $0xf,%dil
  je     L182
L129:
  movzbl (%rcx,%rdx,1),%r8d
  xor    (%rsi,%rdx,1),%r8b
  movzbl %r8b,%r8d
  or     %r8d,%eax
  lea    0x1(%rdx),%r8
  cmp    %r8,%rdi
  jbe    L182
  movzbl 0x1(%rcx,%rdx,1),%r8d
  xor    0x1(%rsi,%rdx,1),%r8b
  movzbl %r8b,%r8d
  or     %r8d,%eax
  lea    0x2(%rdx),%r8
  cmp    %r8,%rdi
  jbe    L182
  movzbl 0x2(%rcx,%rdx,1),%r8d
  xor    0x2(%rsi,%rdx,1),%r8b
  movzbl %r8b,%r8d
  or     %r8d,%eax
  lea    0x3(%rdx),%r8
  cmp    %r8,%rdi
  jbe    L182
  movzbl 0x3(%rcx,%rdx,1),%r8d
  xor    0x3(%rsi,%rdx,1),%r8b
  movzbl %r8b,%r8d
  or     %r8d,%eax
  lea    0x4(%rdx),%r8
  cmp    %r8,%rdi
  jbe    L182
  movzbl 0x4(%rcx,%rdx,1),%r8d
  xor    0x4(%rsi,%rdx,1),%r8b
  movzbl %r8b,%r8d
  or     %r8d,%eax
  lea    0x5(%rdx),%r8
  cmp    %r8,%rdi
  jbe    L182
  movzbl 0x5(%rcx,%rdx,1),%r8d
  xor    0x5(%rsi,%rdx,1),%r8b
  movzbl %r8b,%r8d
  or     %r8d,%eax
  lea    0x6(%rdx),%r8
  cmp    %r8,%rdi
  jbe    L182
  movzbl 0x6(%rcx,%rdx,1),%r8d
  xor    0x6(%rsi,%rdx,1),%r8b
  movzbl %r8b,%r8d
  or     %r8d,%eax
  lea    0x7(%rdx),%r8
  cmp    %r8,%rdi
  jbe    L182
  movzbl 0x7(%rcx,%rdx,1),%r8d
  xor    0x7(%rsi,%rdx,1),%r8b
  movzbl %r8b,%r8d
  or     %r8d,%eax
  lea    0x8(%rdx),%r8
  cmp    %r8,%rdi
  jbe    L182
  movzbl 0x8(%rcx,%rdx,1),%r8d
  xor    0x8(%rsi,%rdx,1),%r8b
  movzbl %r8b,%r8d
  or     %r8d,%eax
  lea    0x9(%rdx),%r8
  cmp    %r8,%rdi
  jbe    L182
  movzbl 0x9(%rcx,%rdx,1),%r8d
  xor    0x9(%rsi,%rdx,1),%r8b
  movzbl %r8b,%r8d
  or     %r8d,%eax
  lea    0xa(%rdx),%r8
  cmp    %r8,%rdi
  jbe    L182
  movzbl 0xa(%rcx,%rdx,1),%r8d
  xor    0xa(%rsi,%rdx,1),%r8b
  movzbl %r8b,%r8d
  or     %r8d,%eax
  lea    0xb(%rdx),%r8
  cmp    %r8,%rdi
  jbe    L182
  movzbl 0xb(%rcx,%rdx,1),%r8d
  xor    0xb(%rsi,%rdx,1),%r8b
  movzbl %r8b,%r8d
  or     %r8d,%eax
  lea    0xc(%rdx),%r8
  cmp    %r8,%rdi
  jbe    L182
  movzbl 0xc(%rcx,%rdx,1),%r8d
  xor    0xc(%rsi,%rdx,1),%r8b
  movzbl %r8b,%r8d
  or     %r8d,%eax
  lea    0xd(%rdx),%r8
  cmp    %r8,%rdi
  jbe    L182
  movzbl 0xd(%rcx,%rdx,1),%r8d
  xor    0xd(%rsi,%rdx,1),%r8b
  movzbl %r8b,%r8d
  or     %r8d,%eax
  lea    0xe(%rdx),%r8
  cmp    %r8,%rdi
  jbe    L182
  movzbl 0xe(%rsi,%rdx,1),%esi
  xor    0xe(%rcx,%rdx,1),%sil
  movzbl %sil,%edx
  or     %edx,%eax
L182:
  test   %eax,%eax
  setne  %al
  movzbl %al,%eax
  ret
  nopw   0x0(%rax,%rax,1)
L167:
  xor    %eax,%eax
  ret
L44:
  xor    %eax,%eax
  xor    %edx,%edx
  jmp    L129
```

assistant: ```c
int timingsafe_bcmp(const void *a, const void *b, size_t n) {
  size_t i;
  const unsigned char *x = a;
  const unsigned char *y = b;
  int r;
  for (i = r = 0; i < n; ++i)
    r |= x[i] ^ y[i];
  return !!r;
}
```