user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<internal_fiat_p448_relax>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rdi,%rbx
  mov    %rsi,%rbp
  mov    $0x8,%esi
  mov    %ebp,%edi
  call   <_br2_load@plt>
  mov    %rax,%r15
  lea    0x8(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,%r14
  lea    0x10(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,%r13
  lea    0x18(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,%r12
  lea    0x20(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,0x8(%rsp)
  lea    0x28(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,0x10(%rsp)
  lea    0x30(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,0x18(%rsp)
  lea    0x38(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,%rbp
  mov    $0x8,%edx
  mov    %r15,%rsi
  mov    %ebx,%edi
  call   <_br2_store@plt>
  lea    0x8(%rbx),%edi
  mov    $0x8,%edx
  mov    %r14,%rsi
  call   <_br2_store@plt>
  lea    0x10(%rbx),%edi
  mov    $0x8,%edx
  mov    %r13,%rsi
  call   <_br2_store@plt>
  lea    0x18(%rbx),%edi
  mov    $0x8,%edx
  mov    %r12,%rsi
  call   <_br2_store@plt>
  lea    0x20(%rbx),%edi
  mov    $0x8,%edx
  mov    0x8(%rsp),%rsi
  call   <_br2_store@plt>
  lea    0x28(%rbx),%edi
  mov    $0x8,%edx
  mov    0x10(%rsp),%rsi
  call   <_br2_store@plt>
  lea    0x30(%rbx),%edi
  mov    $0x8,%edx
  mov    0x18(%rsp),%rsi
  call   <_br2_store@plt>
  lea    0x38(%rbx),%edi
  mov    $0x8,%edx
  mov    %rbp,%rsi
  call   <_br2_store@plt>
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
void internal_fiat_p448_relax(uintptr_t out0, uintptr_t in0) {
  uintptr_t x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15, x16, x17, x18, x19, x20, x21, x22, x23;
  x0 = _br2_load((in0) + ((uintptr_t)0ULL), sizeof(uintptr_t));
  x1 = _br2_load((in0) + ((uintptr_t)8ULL), sizeof(uintptr_t));
  x2 = _br2_load((in0) + ((uintptr_t)16ULL), sizeof(uintptr_t));
  x3 = _br2_load((in0) + ((uintptr_t)24ULL), sizeof(uintptr_t));
  x4 = _br2_load((in0) + ((uintptr_t)32ULL), sizeof(uintptr_t));
  x5 = _br2_load((in0) + ((uintptr_t)40ULL), sizeof(uintptr_t));
  x6 = _br2_load((in0) + ((uintptr_t)48ULL), sizeof(uintptr_t));
  x7 = _br2_load((in0) + ((uintptr_t)56ULL), sizeof(uintptr_t));
  x8 = x0;
  x9 = x1;
  x10 = x2;
  x11 = x3;
  x12 = x4;
  x13 = x5;
  x14 = x6;
  x15 = x7;
  x16 = x8;
  x17 = x9;
  x18 = x10;
  x19 = x11;
  x20 = x12;
  x21 = x13;
  x22 = x14;
  x23 = x15;
  _br2_store((out0) + ((uintptr_t)0ULL), x16, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)8ULL), x17, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)16ULL), x18, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)24ULL), x19, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)32ULL), x20, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)40ULL), x21, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)48ULL), x22, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)56ULL), x23, sizeof(uintptr_t));
  return;
}
```