config/m68k/linux-atomic.c

44 __kernel_cmpxchg (unsigned *mem, unsigned oldval, unsigned newval)
47   register unsigned d2 asm("d2") = oldval;
75     unsigned oldval, newval, cmpval = *ptr;				\
78       oldval = cmpval;							\
79       newval = PFX_OP (oldval INF_OP val);				\
80       cmpval = __kernel_cmpxchg (ptr, oldval, newval);			\
81     } while (__builtin_expect (oldval != cmpval, 0));			\
91     unsigned int mask, shift, oldval, newval, cmpval, wval;		\
99       oldval = cmpval;							\
100       newval = PFX_OP (oldval INF_OP wval);				\
101       newval = (newval & mask) | (oldval & ~mask);			\
102       cmpval = __kernel_cmpxchg (wordptr, oldval, newval);		\
103     } while (__builtin_expect (oldval != cmpval, 0));			\
108 WORD_SYNC_OP (add,   , +, oldval)
109 WORD_SYNC_OP (sub,   , -, oldval)
110 WORD_SYNC_OP (or,    , |, oldval)
111 WORD_SYNC_OP (and,   , &, oldval)
112 WORD_SYNC_OP (xor,   , ^, oldval)
113 WORD_SYNC_OP (nand, ~, &, oldval)
115 SUBWORD_SYNC_OP (add,   , +, unsigned short, 2, oldval)
116 SUBWORD_SYNC_OP (sub,   , -, unsigned short, 2, oldval)
117 SUBWORD_SYNC_OP (or,    , |, unsigned short, 2, oldval)
118 SUBWORD_SYNC_OP (and,   , &, unsigned short, 2, oldval)
119 SUBWORD_SYNC_OP (xor,   , ^, unsigned short, 2, oldval)
120 SUBWORD_SYNC_OP (nand, ~, &, unsigned short, 2, oldval)
122 SUBWORD_SYNC_OP (add,   , +, unsigned char, 1, oldval)
123 SUBWORD_SYNC_OP (sub,   , -, unsigned char, 1, oldval)
124 SUBWORD_SYNC_OP (or,    , |, unsigned char, 1, oldval)
125 SUBWORD_SYNC_OP (and,   , &, unsigned char, 1, oldval)
126 SUBWORD_SYNC_OP (xor,   , ^, unsigned char, 1, oldval)
127 SUBWORD_SYNC_OP (nand, ~, &, unsigned char, 1, oldval)
151 __sync_val_compare_and_swap_4 (unsigned *ptr, unsigned oldval, unsigned newval)
153   return __kernel_cmpxchg (ptr, oldval, newval);
157 __sync_bool_compare_and_swap_4 (unsigned *ptr, unsigned oldval,
160   return __kernel_cmpxchg (ptr, oldval, newval) == oldval;
170     unsigned oldval, newval, cmpval;					\
179       oldval = cmpval;							\
180       if ((oldval & mask) != woldval)					\
182       newval = (oldval & ~mask) | wnewval;				\
183       cmpval = __kernel_cmpxchg (wordptr, oldval, newval);		\
184     } while (__builtin_expect (oldval != cmpval, 0));			\
186     return (oldval >> shift) & MASK_##WIDTH;				\
194   __sync_bool_compare_and_swap_##WIDTH (TYPE *ptr, TYPE oldval,		\
197     return (__sync_val_compare_and_swap_##WIDTH (ptr, oldval, newval)	\
198 	    == oldval);							\
208 WORD_SYNC_OP (test_and_set, , COMMA, oldval)
209 SUBWORD_SYNC_OP (test_and_set, , COMMA, unsigned char, 1, oldval)
210 SUBWORD_SYNC_OP (test_and_set, , COMMA, unsigned short, 2, oldval)