1 .section ".text",#alloc,#execinstr 2 .align 8 3 .skip 16 4 5 6 /* 7 ** int _STLP_atomic_exchange (void *pvalue, int value) 8 */ 9 10 .type _STLP_atomic_exchange,#function 11 .global _STLP_atomic_exchange 12 .align 8 13 14 _STLP_atomic_exchange: 15 0: 16 ld [%o0], %o2 ! Set the current value 17 mov %o1, %o3 ! Set the new value 18 ! swap [%o0], %o3 ! Do the compare and swap 19 cas [%o0], %o2, %o3 20 cmp %o2, %o3 ! Check whether successful 21 bne 0b ! Retry upon failure 22 stbar 23 mov %o2, %o0 ! Set the new value 24 retl ! return 25 nop 26 .size _STLP_atomic_exchange,(.-_STLP_atomic_exchange) 27 28 /* int _STLP_atomic_increment (void *pvalue) */ 29 30 .type _STLP_atomic_increment,#function 31 .global _STLP_atomic_increment 32 .align 8 33 _STLP_atomic_increment: 34 1: 35 ld [%o0], %o2 ! set the current 36 add %o2, 0x1, %o3 ! Increment and store current 37 ! swap [%o0], %o3 ! Do the compare and swap 38 cas [%o0], %o2, %o3 39 cmp %o3, %o2 ! Check whether successful 40 bne 1b ! Retry if we failed. 41 membar #LoadLoad | #LoadStore ! Ensure the cas finishes before 42 ! returning 43 nop 44 retl ! return 45 nop 46 47 .size _STLP_atomic_increment,(.-_STLP_atomic_increment) 48 49 50 /* int _STLP_atomic_decrement (void *pvalue) */ 51 .type _STLP_atomic_decrement,#function 52 .global _STLP_atomic_decrement 53 .align 8 54 55 _STLP_atomic_decrement: 56 2: 57 ld [%o0], %o2 ! set the current 58 sub %o2, 0x1, %o3 ! decrement and store current 59 ! swap [%o0], %o3 ! Do the compare and swap 60 cas [%o0], %o2, %o3 61 cmp %o3, %o2 ! Check whether successful 62 bne 2b ! Retry if we failed. 63 membar #LoadLoad | #LoadStore ! Ensure the cas finishes before 64 nop 65 ! returning 66 retl ! return 67 nop 68 .size _STLP_atomic_decrement,(.-_STLP_atomic_decrement) 69
