| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465 |
- .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:
- 1:
- ldx [%o0], %o2 ! Set the current value
- mov %o1, %o3 ! Set the new value
- casx [%o0], %o2, %o3 ! Do the compare and swap
- cmp %o2, %o3 ! Check whether successful
- bne 1b ! Retry upon failure
- membar #LoadLoad | #LoadStore ! Ensure the cas finishes before
- ! returning
- retl ! return
- mov %o2, %o0 ! Set the new value
- .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:
- 0:
- ldx [%o0], %o2 ! set the current
- addx %o2, 0x1, %o3 ! Increment and store current
- casx [%o0], %o2, %o3 ! Do the compare and swap
- cmp %o3, %o2 ! Check whether successful
- bne 0b
- membar #LoadLoad | #LoadStore ! Ensure the cas finishes before
- ! returning
- retl ! return
- mov %o1, %o0 ! Set the return value
- .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:
- 0:
- ldx [%o0], %o2 ! set the current
- subx %o2, 0x1, %o3 ! decrement and store current
- casx [%o0], %o2, %o3 ! Do the compare and swap
- cmp %o3, %o2 ! Check whether successful
- bne 0b
- membar #LoadLoad | #LoadStore ! Ensure the cas finishes before
- ! returning
- retl ! return
- nop
- .size _STLP_atomic_decrement,(.-_STLP_atomic_decrement)
|
