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- .section ".text",#alloc,#execinstr
- .align 8
- .skip 16
- /*
- ** int _STLP_atomic_exchange (void *pvalue, int value)
- */
- .type _STLP_atomic_exchange,#function
- .global _STLP_atomic_exchange
- .align 8
- _STLP_atomic_exchange:
- 0:
- ld [%o0], %o2 ! Set the current value
- mov %o1, %o3 ! Set the new value
- ! swap [%o0], %o3 ! Do the compare and swap
- cas [%o0], %o2, %o3
- cmp %o2, %o3 ! Check whether successful
- bne 0b ! Retry upon failure
- stbar
- mov %o2, %o0 ! Set the new value
- retl ! return
- nop
- .size _STLP_atomic_exchange,(.-_STLP_atomic_exchange)
- /* int _STLP_atomic_increment (void *pvalue) */
- .type _STLP_atomic_increment,#function
- .global _STLP_atomic_increment
- .align 8
- _STLP_atomic_increment:
- 1:
- ld [%o0], %o2 ! set the current
- add %o2, 0x1, %o3 ! Increment and store current
- ! swap [%o0], %o3 ! Do the compare and swap
- cas [%o0], %o2, %o3
- cmp %o3, %o2 ! Check whether successful
- bne 1b ! Retry if we failed.
- membar #LoadLoad | #LoadStore ! Ensure the cas finishes before
- ! returning
- nop
- retl ! return
- nop
- .size _STLP_atomic_increment,(.-_STLP_atomic_increment)
- /* int _STLP_atomic_decrement (void *pvalue) */
- .type _STLP_atomic_decrement,#function
- .global _STLP_atomic_decrement
- .align 8
- _STLP_atomic_decrement:
- 2:
- ld [%o0], %o2 ! set the current
- sub %o2, 0x1, %o3 ! decrement and store current
- ! swap [%o0], %o3 ! Do the compare and swap
- cas [%o0], %o2, %o3
- cmp %o3, %o2 ! Check whether successful
- bne 2b ! Retry if we failed.
- membar #LoadLoad | #LoadStore ! Ensure the cas finishes before
- nop
- ! returning
- retl ! return
- nop
- .size _STLP_atomic_decrement,(.-_STLP_atomic_decrement)
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