/home/ntakagi/work/STLport-5.1.5/src/sparc_atomic.s
Go to the documentation of this file.00001 .section ".text",#alloc,#execinstr 00002 .align 8 00003 .skip 16 00004 00005 00006 /* 00007 ** int _STLP_atomic_exchange (void *pvalue, int value) 00008 */ 00009 00010 .type _STLP_atomic_exchange,#function 00011 .global _STLP_atomic_exchange 00012 .align 8 00013 00014 _STLP_atomic_exchange: 00015 0: 00016 ld [%o0], %o2 ! Set the current value 00017 mov %o1, %o3 ! Set the new value 00018 ! swap [%o0], %o3 ! Do the compare and swap 00019 cas [%o0], %o2, %o3 00020 cmp %o2, %o3 ! Check whether successful 00021 bne 0b ! Retry upon failure 00022 stbar 00023 mov %o2, %o0 ! Set the new value 00024 retl ! return 00025 nop 00026 .size _STLP_atomic_exchange,(.-_STLP_atomic_exchange) 00027 00028 /* int _STLP_atomic_increment (void *pvalue) */ 00029 00030 .type _STLP_atomic_increment,#function 00031 .global _STLP_atomic_increment 00032 .align 8 00033 _STLP_atomic_increment: 00034 1: 00035 ld [%o0], %o2 ! set the current 00036 add %o2, 0x1, %o3 ! Increment and store current 00037 ! swap [%o0], %o3 ! Do the compare and swap 00038 cas [%o0], %o2, %o3 00039 cmp %o3, %o2 ! Check whether successful 00040 bne 1b ! Retry if we failed. 00041 membar #LoadLoad | #LoadStore ! Ensure the cas finishes before 00042 ! returning 00043 nop 00044 retl ! return 00045 nop 00046 00047 .size _STLP_atomic_increment,(.-_STLP_atomic_increment) 00048 00049 00050 /* int _STLP_atomic_decrement (void *pvalue) */ 00051 .type _STLP_atomic_decrement,#function 00052 .global _STLP_atomic_decrement 00053 .align 8 00054 00055 _STLP_atomic_decrement: 00056 2: 00057 ld [%o0], %o2 ! set the current 00058 sub %o2, 0x1, %o3 ! decrement and store current 00059 ! swap [%o0], %o3 ! Do the compare and swap 00060 cas [%o0], %o2, %o3 00061 cmp %o3, %o2 ! Check whether successful 00062 bne 2b ! Retry if we failed. 00063 membar #LoadLoad | #LoadStore ! Ensure the cas finishes before 00064 nop 00065 ! returning 00066 retl ! return 00067 nop 00068 .size _STLP_atomic_decrement,(.-_STLP_atomic_decrement)
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