2 // Currently, SUN CC requires object file
7 ** int _STLP_atomic_exchange (__stl_atomic_t *pvalue, __stl_atomic_t value)
14 # define _STLP_EXCH_ASM asm volatile ("casx [%3], %4, %0 ; membar #LoadLoad | #LoadStore " : \
15 "=r" (_L_value2), "=m" (*_L_pvalue1) : \
16 "m" (*_L_pvalue1), "r" (_L_pvalue1), "r" (_L_value1), "0" (_L_value2) )
18 # else /* __arch64__ */
20 # define _STLP_EXCH_ASM asm volatile ("cas [%3], %4, %0" : \
21 "=r" (_L_value2), "=m" (*_L_pvalue1) : \
22 "m" (*_L_pvalue1), "r" (_L_pvalue1), "r" (_L_value1), "0" (_L_value2) )
25 # else /* __sparc_v9__ */
27 # define _STLP_EXCH_ASM asm volatile ("swap [%3], %0 " : \
28 "=r" (_L_value2), "=m" (*_L_pvalue1) : \
29 "m" (*_L_pvalue1), "r" (_L_pvalue1), "0" (_L_value2) )
33 # define _STLP_ATOMIC_EXCHANGE(__pvalue1, __value2) \
34 ({ register volatile __stl_atomic_t *_L_pvalue1 = __pvalue1; \
35 register __stl_atomic_t _L_value1, _L_value2 = __value2 ; \
36 do { _L_value1 = *_L_pvalue1; _STLP_EXCH_ASM; } while ( _L_value1 != _L_value2 ) ; \
39 # define _STLP_ATOMIC_INCREMENT(__pvalue1) \
40 { register volatile __stl_atomic_t *_L_pvalue1 = __pvalue1; \
41 register __stl_atomic_t _L_value1, _L_value2; \
42 do { _L_value1 = *_L_pvalue1; _L_value2 = _L_value1+1; _STLP_EXCH_ASM; } while ( _L_value1 != _L_value2 ) ; }
44 # define _STLP_ATOMIC_DECREMENT(__pvalue1) \
45 { register volatile __stl_atomic_t *_L_pvalue1 = __pvalue1; \
46 register __stl_atomic_t _L_value1, _L_value2; \
47 do { _L_value1 = *_L_pvalue1; _L_value2 = _L_value1-1; _STLP_EXCH_ASM; } while ( _L_value1 != _L_value2 ) ; }
49 # elif ! defined (_STLP_NO_EXTERN_INLINE)
51 extern "C" __stl_atomic_t _STLP_atomic_exchange(__stl_atomic_t * __x, __stl_atomic_t __v);
52 extern "C" void _STLP_atomic_decrement(__stl_atomic_t* i);
53 extern "C" void _STLP_atomic_increment(__stl_atomic_t* i);
55 # define _STLP_ATOMIC_INCREMENT(__x) _STLP_atomic_increment((__stl_atomic_t*)__x)
56 # define _STLP_ATOMIC_DECREMENT(__x) _STLP_atomic_decrement((__stl_atomic_t*)__x)
57 # define _STLP_ATOMIC_EXCHANGE(__x, __y) _STLP_atomic_exchange((__stl_atomic_t*)__x, (__stl_atomic_t)__y)