1 /*
2 * bitops.h: Bit string operations on the m68k
3 */
4
5 #ifndef _M68K_BITOPS_H
6 #define _M68K_BITOPS_H
7
8 #include <asm/byteorder.h>
9 #include <asm-generic/bitops/fls.h>
10 #include <asm-generic/bitops/__fls.h>
11 #include <asm-generic/bitops/fls64.h>
12 #include <asm-generic/bitops/__ffs.h>
13
14 extern void set_bit(int nr, volatile void *addr);
15 extern void clear_bit(int nr, volatile void *addr);
16 extern void change_bit(int nr, volatile void *addr);
17 extern int test_and_clear_bit(int nr, volatile void *addr);
18 extern int test_and_change_bit(int nr, volatile void *addr);
19
20 #ifdef __KERNEL__
21
22
test_bit(int nr,__const__ volatile void * addr)23 static inline int test_bit(int nr, __const__ volatile void *addr)
24 {
25 __const__ unsigned int *p = (__const__ unsigned int *) addr;
26
27 return (p[nr >> 5] & (1UL << (nr & 31))) != 0;
28 }
29
test_and_set_bit(int nr,volatile void * vaddr)30 static inline int test_and_set_bit(int nr, volatile void *vaddr)
31 {
32 char retval;
33
34 volatile char *p = &((volatile char *)vaddr)[(nr^31) >> 3];
35 __asm__ __volatile__ ("bset %2,(%4); sne %0"
36 : "=d" (retval), "=m" (*p)
37 : "di" (nr & 7), "m" (*p), "a" (p));
38
39 return retval;
40 }
41
42 #define __ffs(x) (ffs(x) - 1)
43
44 /*
45 * * hweightN: returns the hamming weight (i.e. the number
46 * * of bits set) of a N-bit word
47 * */
48
49 #define hweight32(x) generic_hweight32(x)
50 #define hweight16(x) generic_hweight16(x)
51 #define hweight8(x) generic_hweight8(x)
52
53 #endif /* __KERNEL__ */
54
55 #endif /* _M68K_BITOPS_H */
56