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/*
* Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
*
* This file is part of nios2sim-ng.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#ifndef _BITS_H_
#define _BITS_H_
#define BIT_MASK_FILL(n) (((n) == 64) ? ~0ULL : ((1ULL << (n))-1))
#define BIT_MASK(n) (1UL << ((n) % 32))
#define BIT_UINT32(n) ((n) / 32)
/**
* Sets a bit in memory.
*/
static inline void set_bit(unsigned int nr, uint32_t *addr)
{
uint32_t mask = BIT_MASK(nr);
uint32_t *p = addr + BIT_UINT32(nr);
*p |= mask;
}
/**
* Clears a bit in memory.
*/
static inline void clear_bit(unsigned int nr, uint32_t *addr)
{
uint32_t mask = BIT_MASK(nr);
uint32_t *p = addr + BIT_UINT32(nr);
*p &= ~mask;
}
#endif /* _BITS_H_ */
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