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/*
* bitops.h: Bit string operations on the m68k
*/
#ifndef _M68K_BITOPS_H
#define _M68K_BITOPS_H
#include <asm/byteorder.h>
extern void set_bit(int nr, volatile void *addr);
extern void clear_bit(int nr, volatile void *addr);
extern void change_bit(int nr, volatile void *addr);
extern int test_and_set_bit(int nr, volatile void *addr);
extern int test_and_clear_bit(int nr, volatile void *addr);
extern int test_and_change_bit(int nr, volatile void *addr);
#ifdef __KERNEL__
extern inline int test_bit(int nr, __const__ volatile void *addr)
{
__const__ unsigned int *p = (__const__ unsigned int *) addr;
return (p[nr >> 5] & (1UL << (nr & 31))) != 0;
}
extern inline int test_and_set_bit(int nr, volatile void *vaddr)
{
char retval;
volatile char *p = &((volatile char *)vaddr)[(nr^31) >> 3];
__asm__ __volatile__ ("bset %2,(%4); sne %0"
: "=d" (retval), "=m" (*p)
: "di" (nr & 7), "m" (*p), "a" (p));
return retval;
}
#define __ffs(x) (ffs(x) - 1)
/*
* * hweightN: returns the hamming weight (i.e. the number
* * of bits set) of a N-bit word
* */
#define hweight32(x) generic_hweight32(x)
#define hweight16(x) generic_hweight16(x)
#define hweight8(x) generic_hweight8(x)
#endif /* __KERNEL__ */
#endif /* _M68K_BITOPS_H */
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