/**
 * \file
 * Macros for tagging and untagging pointers.
 *
 * Copyright (C) 2014 Xamarin Inc
 *
 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
 */

#ifndef __MONO_SGEN_TAGGED_POINTER_H__
#define __MONO_SGEN_TAGGED_POINTER_H__

#define SGEN_TAGGED_POINTER_MASK	7

#define SGEN_POINTER_IS_TAGGED_1(p)	((mword)(p) & 1)
#define SGEN_POINTER_TAG_1(p)		((void*)((mword)(p) | 1))
#define SGEN_POINTER_UNTAG_1(p)		((void*)((mword)(p) & ~1))

#define SGEN_POINTER_IS_TAGGED_2(p)	((mword)(p) & 2)
#define SGEN_POINTER_TAG_2(p)		((void*)((mword)(p) | 2))
#define SGEN_POINTER_UNTAG_2(p)		((void*)((mword)(p) & ~2))

#define SGEN_POINTER_TAG_12(p)		((mword)(p) & 3)
#define SGEN_POINTER_SET_TAG_12(p,t)	((void*)(((mword)(p) & ~3) | (t)))

#define SGEN_POINTER_IS_TAGGED_4(p)	((mword)(p) & 4)
#define SGEN_POINTER_TAG_4(p)		((void*)((mword)(p) | 4))
#define SGEN_POINTER_UNTAG_4(p)		((void*)((mword)(p) & ~4))

#define SGEN_POINTER_UNTAG_12(p)	((void*)((mword)(p) & ~3))
#define SGEN_POINTER_UNTAG_24(p)	((void*)((mword)(p) & ~6))

#define SGEN_POINTER_IS_TAGGED_ANY(p)	((mword)(p) & SGEN_TAGGED_POINTER_MASK)
#define SGEN_POINTER_UNTAG_ALL(p)	((void*)((mword)(p) & ~SGEN_TAGGED_POINTER_MASK))

#endif