1 
2 // Currently, SUN CC requires object file
3 
4 #if defined (__GNUC__)
5 
6 /*
7 **  int _STLP_atomic_exchange (__stl_atomic_t *pvalue, __stl_atomic_t value)
8 */
9 
10 #  if defined(__sparc_v9__) || defined (__sparcv9)
11 
12 #    ifdef __arch64__
13 
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) )
17 
18 #    else /* __arch64__ */
19 
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) )
23 #    endif
24 
25 #  else /* __sparc_v9__ */
26 
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) )
30 #  endif
31 
32 
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 ) ; \
37      _L_value1; })
38 
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 ) ; \
43     (_L_value2 + 1); })
44 
45 #  define _STLP_ATOMIC_DECREMENT(__pvalue1) \
46  ({  register volatile __stl_atomic_t *_L_pvalue1 = __pvalue1; \
47     register __stl_atomic_t _L_value1, _L_value2; \
48     do { _L_value1 = *_L_pvalue1;  _L_value2 = _L_value1-1; _STLP_EXCH_ASM; } while ( _L_value1 != _L_value2 ) ; \
49     (_L_value2 - 1); })
50 
51 #  elif ! defined (_STLP_NO_EXTERN_INLINE)
52 
53 extern "C" __stl_atomic_t _STLP_atomic_exchange(__stl_atomic_t * __x, __stl_atomic_t __v);
54 extern "C" void _STLP_atomic_decrement(__stl_atomic_t* i);
55 extern "C" void _STLP_atomic_increment(__stl_atomic_t* i);
56 
57 #    define _STLP_ATOMIC_INCREMENT(__x)           _STLP_atomic_increment((__stl_atomic_t*)__x)
58 #    define _STLP_ATOMIC_DECREMENT(__x)           _STLP_atomic_decrement((__stl_atomic_t*)__x)
59 #    define _STLP_ATOMIC_EXCHANGE(__x, __y)       _STLP_atomic_exchange((__stl_atomic_t*)__x, (__stl_atomic_t)__y)
60 
61 #endif
62