2 * bitops.h: Bit string operations on the m68k
8 #include <linux/config.h>
9 #include <asm/byteorder.h>
11 extern void set_bit(int nr, volatile void *addr);
12 extern void clear_bit(int nr, volatile void *addr);
13 extern void change_bit(int nr, volatile void *addr);
14 extern int test_and_set_bit(int nr, volatile void *addr);
15 extern int test_and_clear_bit(int nr, volatile void *addr);
16 extern int test_and_change_bit(int nr, volatile void *addr);
21 extern inline int test_bit(int nr, __const__ volatile void *addr)
23 __const__ unsigned int *p = (__const__ unsigned int *) addr;
25 return (p[nr >> 5] & (1UL << (nr & 31))) != 0;
28 extern inline int test_and_set_bit(int nr, volatile void *vaddr)
32 volatile char *p = &((volatile char *)vaddr)[(nr^31) >> 3];
33 __asm__ __volatile__ ("bset %2,(%4); sne %0"
34 : "=d" (retval), "=m" (*p)
35 : "di" (nr & 7), "m" (*p), "a" (p));
40 #define __ffs(x) (ffs(x) - 1)
43 * * hweightN: returns the hamming weight (i.e. the number
44 * * of bits set) of a N-bit word
47 #define hweight32(x) generic_hweight32(x)
48 #define hweight16(x) generic_hweight16(x)
49 #define hweight8(x) generic_hweight8(x)
51 #endif /* __KERNEL__ */
53 #endif /* _M68K_BITOPS_H */