/* _Atomic_fetch_xor_8 */
_Uint8_t _Fetch_xor_8(volatile _Uint8_t *_Tgt, _Uint8_t _Value)
{ /* xor _Value with *_Tgt atomically with
sequentially consistent memory order */
#if _MS_32
_Compiler_barrier();
__asm
{
mov esi, _Tgt;
mov eax, [esi];
mov edx, 4[esi];
again:
mov ecx, edx;
mov ebx, eax;
xor ebx, dword ptr _Value;
xor ecx, dword ptr _Value[4];
lock cmpxchg8b [esi];
jnz again;
mov dword ptr _Value, eax;
mov dword ptr _Value[4], edx;
}
_Compiler_barrier();
#elif _MS_64
_Value = _InterlockedXor64((volatile _LONGLONG *)_Tgt, _Value);
#endif /* _MS_32 */
return (_Value);
}
__int64 __stdcall InterlockedXor64(__int64 volatile *Destination, __int64 Value)
{
return _InterlockedXor64(Destination, Value);
}
