user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<flip_D1>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %rsi,-0x30(%rbp)
  movq   $0x0,-0x20(%rbp)
  movabs $0x101010101010,%rax
  and    -0x28(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  movabs $0x10101010101000,%rax
  and    -0x30(%rbp),%rax
  movabs $0xfefefefefefe000,%rdx
  or     %rdx,%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x18(%rbp),%rax
  shl    $0x8,%rax
  mov    %rax,%rdx
  mov    -0x10(%rbp),%rax
  add    %rax,%rdx
  movabs $0x1000000000000000,%rax
  and    %rdx,%rax
  mov    %rax,-0x8(%rbp)
  cmpq   $0x0,-0x8(%rbp)
  je     L35
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <last_bit@plt>
  mov    $0x2,%edx
  mov    %eax,%ecx
  shl    %cl,%rdx
  mov    %rdx,%rcx
  movabs $0x1000000000000000,%rax
  sub    %rcx,%rax
  mov    %rax,%rdx
  movabs $0x10101010101000,%rax
  and    %rdx,%rax
  or     %rax,-0x20(%rbp)
L35:
  movabs $0x40201000000,%rax
  and    -0x28(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  movabs $0x8040200000000,%rax
  and    -0x30(%rbp),%rax
  movabs $0xff7fbfc00000000,%rdx
  or     %rdx,%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x18(%rbp),%rax
  shl    $0x9,%rax
  mov    %rax,%rdx
  mov    -0x10(%rbp),%rax
  add    %rax,%rdx
  movabs $0x1000000000000000,%rax
  and    %rdx,%rax
  mov    %rax,-0x8(%rbp)
  cmpq   $0x0,-0x8(%rbp)
  je     L49
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <last_bit@plt>
  mov    $0x2,%edx
  mov    %eax,%ecx
  shl    %cl,%rdx
  mov    %rdx,%rcx
  movabs $0x1000000000000000,%rax
  sub    %rcx,%rax
  mov    %rax,%rdx
  movabs $0x8040200000000,%rax
  and    %rdx,%rax
  or     %rax,-0x20(%rbp)
L49:
  movabs $0x408000000000,%rax
  and    -0x28(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  movabs $0x20400000000000,%rax
  and    -0x30(%rbp),%rax
  movabs $0xfdf800000000000,%rdx
  or     %rdx,%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x18(%rbp),%rax
  shl    $0x7,%rax
  mov    %rax,%rdx
  mov    -0x10(%rbp),%rax
  add    %rax,%rdx
  movabs $0x1000000000000000,%rax
  and    %rdx,%rax
  mov    %rax,-0x8(%rbp)
  cmpq   $0x0,-0x8(%rbp)
  je     L11
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <last_bit@plt>
  mov    $0x2,%edx
  mov    %eax,%ecx
  shl    %cl,%rdx
  mov    %rdx,%rcx
  movabs $0x1000000000000000,%rax
  sub    %rcx,%rax
  mov    %rax,%rdx
  movabs $0x20400000000000,%rax
  and    %rdx,%rax
  or     %rax,-0x20(%rbp)
L11:
  movabs $0x700000000000000,%rax
  and    -0x28(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  lea    (%rax,%rax,1),%rdx
  mov    -0x30(%rbp),%rax
  add    %rax,%rdx
  movabs $0x1000000000000000,%rax
  and    %rdx,%rax
  mov    %rax,-0x8(%rbp)
  cmpq   $0x0,-0x8(%rbp)
  je     L30
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <last_bit@plt>
  mov    $0x2,%edx
  mov    %eax,%ecx
  shl    %cl,%rdx
  movabs $0x1000000000000000,%rax
  sub    %rdx,%rax
  or     %rax,-0x20(%rbp)
L30:
  movabs $0xc000000000000000,%rax
  and    -0x28(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  movabs $0x2000000000000000,%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  and    -0x18(%rbp),%rax
  mov    %rax,-0x8(%rbp)
  cmpq   $0x0,-0x8(%rbp)
  je     L41
  mov    -0x8(%rbp),%rax
  lea    -0x1(%rax),%rdx
  movabs $0xe000000000000000,%rax
  and    %rdx,%rax
  or     %rax,-0x20(%rbp)
L41:
  mov    -0x20(%rbp),%rax
  leave
  ret
```

assistant: ```c
unsigned long long flip_D1(const unsigned long long discs_player, const unsigned long long discs_opponent) {
  unsigned long long my_discs, opp_discs, r, flipped = 0ULL;
  my_discs = discs_player & 0X0000101010101010ULL;
  opp_discs = (discs_opponent & 0X0010101010101000ULL) | 0X0FEFEFEFEFEFE000ULL;
  r = ((my_discs << 8) + opp_discs) & 0X1000000000000000ULL;
  if (r != 0) {
    flipped |= (0X1000000000000000ULL - (0X2ULL << last_bit(my_discs))) & 0X0010101010101000ULL;
  }
  my_discs = discs_player & 0X0000040201000000ULL;
  opp_discs = (discs_opponent & 0X0008040200000000ULL) | 0X0FF7FBFC00000000ULL;
  r = ((my_discs << 9) + opp_discs) & 0X1000000000000000ULL;
  if (r != 0) {
    flipped |= (0X1000000000000000ULL - (0X2ULL << last_bit(my_discs))) & 0X0008040200000000ULL;
  }
  my_discs = discs_player & 0X0000408000000000ULL;
  opp_discs = (discs_opponent & 0X0020400000000000ULL) | 0X0FDF800000000000ULL;
  r = ((my_discs << 7) + opp_discs) & 0X1000000000000000ULL;
  if (r != 0) {
    flipped |= (0X1000000000000000ULL - (0X2ULL << last_bit(my_discs))) & 0X0020400000000000ULL;
  }
  my_discs = discs_player & 0X0700000000000000ULL;
  r = ((my_discs << 1) + discs_opponent) & 0X1000000000000000ULL;
  if (r != 0) {
    flipped |= 0X1000000000000000ULL - (0X2ULL << last_bit(my_discs));
  }
  my_discs = discs_player & 0XC000000000000000ULL;
  r = (discs_opponent + 0X2000000000000000ULL) & my_discs;
  if (r != 0) {
    flipped |= (r - 1) & 0XE000000000000000ULL;
  }
  return flipped;
}
```