user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<internal_fiat_poly1305_selectznz>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %rdi,%rbx
  mov    %rsi,%r15
  mov    %rdx,%r12
  mov    %rcx,%rbp
  mov    $0x8,%esi
  mov    %edx,%edi
  call   <_br2_load@plt>
  mov    %rax,(%rsp)
  lea    0x4(%r12),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,%r14
  lea    0x8(%r12),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,0x8(%rsp)
  lea    0xc(%r12),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,0x10(%rsp)
  lea    0x10(%r12),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,0x18(%rsp)
  mov    $0x8,%esi
  mov    %ebp,%edi
  call   <_br2_load@plt>
  mov    %rax,0x20(%rsp)
  lea    0x4(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,%r13
  lea    0x8(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,%r12
  lea    0xc(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,0x28(%rsp)
  lea    0x10(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,%rdx
  neg    %r15
  sbb    %rsi,%rsi
  mov    $0xffffffff,%eax
  xor    %rsi,%rax
  and    %rsi,%r13
  and    %rax,%r14
  or     %r14,%r13
  and    %rsi,%r12
  mov    0x8(%rsp),%rcx
  and    %rax,%rcx
  or     %rcx,%r12
  mov    0x28(%rsp),%rbp
  and    %rsi,%rbp
  mov    0x10(%rsp),%rcx
  and    %rax,%rcx
  or     %rcx,%rbp
  and    %rsi,%rdx
  mov    %rdx,%r14
  mov    0x18(%rsp),%rdx
  and    %rax,%rdx
  or     %rdx,%r14
  and    0x20(%rsp),%rsi
  and    (%rsp),%rax
  or     %rax,%rsi
  mov    $0x8,%edx
  mov    %ebx,%edi
  call   <_br2_store@plt>
  lea    0x4(%rbx),%edi
  mov    $0x8,%edx
  mov    %r13,%rsi
  call   <_br2_store@plt>
  lea    0x8(%rbx),%edi
  mov    $0x8,%edx
  mov    %r12,%rsi
  call   <_br2_store@plt>
  lea    0xc(%rbx),%edi
  mov    $0x8,%edx
  mov    %rbp,%rsi
  call   <_br2_store@plt>
  lea    0x10(%rbx),%edi
  mov    $0x8,%edx
  mov    %r14,%rsi
  call   <_br2_store@plt>
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
void internal_fiat_poly1305_selectznz(uintptr_t out0, uintptr_t in0, uintptr_t in1, uintptr_t in2) {
  uintptr_t x5, x10, x0, x11, x6, x13, x1, x14, x7, x16, x2, x17, x8, x19, x3, x20, x9, x22, x4, x23, x12, x15, x18, x21, x24, x25, x26, x27, x28, x29;
  x0 = _br2_load((in1) + ((uintptr_t)0ULL), sizeof(uintptr_t));
  x1 = _br2_load((in1) + ((uintptr_t)4ULL), sizeof(uintptr_t));
  x2 = _br2_load((in1) + ((uintptr_t)8ULL), sizeof(uintptr_t));
  x3 = _br2_load((in1) + ((uintptr_t)12ULL), sizeof(uintptr_t));
  x4 = _br2_load((in1) + ((uintptr_t)16ULL), sizeof(uintptr_t));
  x5 = _br2_load((in2) + ((uintptr_t)0ULL), sizeof(uintptr_t));
  x6 = _br2_load((in2) + ((uintptr_t)4ULL), sizeof(uintptr_t));
  x7 = _br2_load((in2) + ((uintptr_t)8ULL), sizeof(uintptr_t));
  x8 = _br2_load((in2) + ((uintptr_t)12ULL), sizeof(uintptr_t));
  x9 = _br2_load((in2) + ((uintptr_t)16ULL), sizeof(uintptr_t));
  x10 = ((uintptr_t)-1ULL) + ((in0) == ((uintptr_t)0ULL));
  x11 = (x10) ^ ((uintptr_t)4294967295ULL);
  x12 = ((x5) & (x10)) | ((x0) & (x11));
  x13 = ((uintptr_t)-1ULL) + ((in0) == ((uintptr_t)0ULL));
  x14 = (x13) ^ ((uintptr_t)4294967295ULL);
  x15 = ((x6) & (x13)) | ((x1) & (x14));
  x16 = ((uintptr_t)-1ULL) + ((in0) == ((uintptr_t)0ULL));
  x17 = (x16) ^ ((uintptr_t)4294967295ULL);
  x18 = ((x7) & (x16)) | ((x2) & (x17));
  x19 = ((uintptr_t)-1ULL) + ((in0) == ((uintptr_t)0ULL));
  x20 = (x19) ^ ((uintptr_t)4294967295ULL);
  x21 = ((x8) & (x19)) | ((x3) & (x20));
  x22 = ((uintptr_t)-1ULL) + ((in0) == ((uintptr_t)0ULL));
  x23 = (x22) ^ ((uintptr_t)4294967295ULL);
  x24 = ((x9) & (x22)) | ((x4) & (x23));
  x25 = x12;
  x26 = x15;
  x27 = x18;
  x28 = x21;
  x29 = x24;
  _br2_store((out0) + ((uintptr_t)0ULL), x25, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)4ULL), x26, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)8ULL), x27, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)12ULL), x28, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)16ULL), x29, sizeof(uintptr_t));
  return;
}
```