user: Please show me the C implementation that matches the assembly code listed below:

```asm
<internal_fiat_25519_carry>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %rdi,%rbx
  mov    %rsi,%rbp
  mov    $0x8,%esi
  mov    %ebp,%edi
  call   <_br2_load@plt>
  mov    %rax,%r15
  lea    0x4(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,%r14
  lea    0x8(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,%r13
  lea    0xc(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,%r12
  lea    0x10(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,0x8(%rsp)
  lea    0x14(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,0x10(%rsp)
  lea    0x18(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,0x18(%rsp)
  lea    0x1c(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,0x20(%rsp)
  lea    0x20(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,0x28(%rsp)
  lea    0x24(%rbp),%edi
  mov    $0x8,%esi
  call   <_br2_load@plt>
  mov    %rax,%rcx
  mov    %r15,%rdx
  shr    $0x1a,%rdx
  add    %r14,%rdx
  mov    %rdx,%rdi
  shr    $0x19,%rdi
  mov    %rdi,%rax
  add    %r13,%rax
  mov    %rax,%r14
  shr    $0x1a,%r14
  add    %r12,%r14
  mov    %r14,%r13
  shr    $0x19,%r13
  add    0x8(%rsp),%r13
  mov    %r13,%r12
  shr    $0x1a,%r12
  add    0x10(%rsp),%r12
  mov    %r12,%rbp
  shr    $0x19,%rbp
  add    0x18(%rsp),%rbp
  mov    %rbp,%rsi
  shr    $0x1a,%rsi
  add    0x20(%rsp),%rsi
  mov    %rsi,0x8(%rsp)
  shr    $0x19,%rsi
  mov    %rsi,%rdi
  add    0x28(%rsp),%rdi
  mov    %rdi,0x10(%rsp)
  mov    %rdi,%r8
  shr    $0x1a,%r8
  add    %r8,%rcx
  mov    %rcx,0x18(%rsp)
  shr    $0x19,%rcx
  lea    (%rcx,%rcx,8),%rsi
  lea    (%rcx,%rsi,2),%rsi
  and    $0x3ffffff,%r15d
  add    %r15,%rsi
  mov    %rsi,%r15
  shr    $0x1a,%r15
  and    $0x1ffffff,%edx
  add    %rdx,%r15
  mov    %r15,%rdx
  shr    $0x19,%rdx
  and    $0x3ffffff,%eax
  add    %rdx,%rax
  mov    %rax,0x20(%rsp)
  and    $0x3ffffff,%esi
  mov    $0x8,%edx
  mov    %ebx,%edi
  call   <_br2_store@plt>
  and    $0x1ffffff,%r15d
  mov    %r15,%rsi
  lea    0x4(%rbx),%edi
  mov    $0x8,%edx
  call   <_br2_store@plt>
  lea    0x8(%rbx),%edi
  mov    $0x8,%edx
  mov    0x20(%rsp),%rsi
  call   <_br2_store@plt>
  and    $0x1ffffff,%r14d
  mov    %r14,%rsi
  lea    0xc(%rbx),%edi
  mov    $0x8,%edx
  call   <_br2_store@plt>
  and    $0x3ffffff,%r13d
  mov    %r13,%rsi
  lea    0x10(%rbx),%edi
  mov    $0x8,%edx
  call   <_br2_store@plt>
  and    $0x1ffffff,%r12d
  mov    %r12,%rsi
  lea    0x14(%rbx),%edi
  mov    $0x8,%edx
  call   <_br2_store@plt>
  and    $0x3ffffff,%ebp
  mov    %rbp,%rsi
  lea    0x18(%rbx),%edi
  mov    $0x8,%edx
  call   <_br2_store@plt>
  mov    0x8(%rsp),%rsi
  and    $0x1ffffff,%esi
  lea    0x1c(%rbx),%edi
  mov    $0x8,%edx
  call   <_br2_store@plt>
  mov    0x10(%rsp),%rsi
  and    $0x3ffffff,%esi
  lea    0x20(%rbx),%edi
  mov    $0x8,%edx
  call   <_br2_store@plt>
  mov    0x18(%rsp),%rsi
  and    $0x1ffffff,%esi
  lea    0x24(%rbx),%edi
  mov    $0x8,%edx
  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_25519_carry(uintptr_t out0, uintptr_t in0) {
  uintptr_t x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x20, x21, x12, x13, x14, x15, x16, x17, x18, x19, x22, x23, x24, x25, x26, x27, x28, x29, x30, x31, x32, x33, x34, x35, x36, x37, x38, x39, x40, x41;
  x0 = _br2_load((in0) + ((uintptr_t)0ULL), sizeof(uintptr_t));
  x1 = _br2_load((in0) + ((uintptr_t)4ULL), sizeof(uintptr_t));
  x2 = _br2_load((in0) + ((uintptr_t)8ULL), sizeof(uintptr_t));
  x3 = _br2_load((in0) + ((uintptr_t)12ULL), sizeof(uintptr_t));
  x4 = _br2_load((in0) + ((uintptr_t)16ULL), sizeof(uintptr_t));
  x5 = _br2_load((in0) + ((uintptr_t)20ULL), sizeof(uintptr_t));
  x6 = _br2_load((in0) + ((uintptr_t)24ULL), sizeof(uintptr_t));
  x7 = _br2_load((in0) + ((uintptr_t)28ULL), sizeof(uintptr_t));
  x8 = _br2_load((in0) + ((uintptr_t)32ULL), sizeof(uintptr_t));
  x9 = _br2_load((in0) + ((uintptr_t)36ULL), sizeof(uintptr_t));
  x10 = x0;
  x11 = ((x10) >> ((uintptr_t)26ULL)) + (x1);
  x12 = ((x11) >> ((uintptr_t)25ULL)) + (x2);
  x13 = ((x12) >> ((uintptr_t)26ULL)) + (x3);
  x14 = ((x13) >> ((uintptr_t)25ULL)) + (x4);
  x15 = ((x14) >> ((uintptr_t)26ULL)) + (x5);
  x16 = ((x15) >> ((uintptr_t)25ULL)) + (x6);
  x17 = ((x16) >> ((uintptr_t)26ULL)) + (x7);
  x18 = ((x17) >> ((uintptr_t)25ULL)) + (x8);
  x19 = ((x18) >> ((uintptr_t)26ULL)) + (x9);
  x20 = ((x10) & ((uintptr_t)67108863ULL)) + (((x19) >> ((uintptr_t)25ULL)) * ((uintptr_t)19ULL));
  x21 = ((x20) >> ((uintptr_t)26ULL)) + ((x11) & ((uintptr_t)33554431ULL));
  x22 = (x20) & ((uintptr_t)67108863ULL);
  x23 = (x21) & ((uintptr_t)33554431ULL);
  x24 = ((x21) >> ((uintptr_t)25ULL)) + ((x12) & ((uintptr_t)67108863ULL));
  x25 = (x13) & ((uintptr_t)33554431ULL);
  x26 = (x14) & ((uintptr_t)67108863ULL);
  x27 = (x15) & ((uintptr_t)33554431ULL);
  x28 = (x16) & ((uintptr_t)67108863ULL);
  x29 = (x17) & ((uintptr_t)33554431ULL);
  x30 = (x18) & ((uintptr_t)67108863ULL);
  x31 = (x19) & ((uintptr_t)33554431ULL);
  x32 = x22;
  x33 = x23;
  x34 = x24;
  x35 = x25;
  x36 = x26;
  x37 = x27;
  x38 = x28;
  x39 = x29;
  x40 = x30;
  x41 = x31;
  _br2_store((out0) + ((uintptr_t)0ULL), x32, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)4ULL), x33, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)8ULL), x34, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)12ULL), x35, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)16ULL), x36, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)20ULL), x37, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)24ULL), x38, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)28ULL), x39, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)32ULL), x40, sizeof(uintptr_t));
  _br2_store((out0) + ((uintptr_t)36ULL), x41, sizeof(uintptr_t));
  return;
}
```