build/stlport/src/sparc_atomic.s@6474c204b198 (annotated)
build/stlport/src/sparc_atomic.s
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | .section ".text",#alloc,#execinstr |
| michael@0 | 2 | .align 8 |
| michael@0 | 3 | .skip 16 |
| michael@0 | 4 | |
| michael@0 | 5 | |
| michael@0 | 6 | /* |
| michael@0 | 7 | ** int _STLP_atomic_exchange (void *pvalue, int value) |
| michael@0 | 8 | */ |
| michael@0 | 9 | |
| michael@0 | 10 | .type _STLP_atomic_exchange,#function |
| michael@0 | 11 | .global _STLP_atomic_exchange |
| michael@0 | 12 | .align 8 |
| michael@0 | 13 | |
| michael@0 | 14 | _STLP_atomic_exchange: |
| michael@0 | 15 | 0: |
| michael@0 | 16 | ld [%o0], %o2 ! Set the current value |
| michael@0 | 17 | mov %o1, %o3 ! Set the new value |
| michael@0 | 18 | ! swap [%o0], %o3 ! Do the compare and swap |
| michael@0 | 19 | cas [%o0], %o2, %o3 |
| michael@0 | 20 | cmp %o2, %o3 ! Check whether successful |
| michael@0 | 21 | bne 0b ! Retry upon failure |
| michael@0 | 22 | stbar |
| michael@0 | 23 | mov %o2, %o0 ! Set the new value |
| michael@0 | 24 | retl ! return |
| michael@0 | 25 | nop |
| michael@0 | 26 | .size _STLP_atomic_exchange,(.-_STLP_atomic_exchange) |
| michael@0 | 27 | |
| michael@0 | 28 | /* int _STLP_atomic_increment (void *pvalue) */ |
| michael@0 | 29 | |
| michael@0 | 30 | .type _STLP_atomic_increment,#function |
| michael@0 | 31 | .global _STLP_atomic_increment |
| michael@0 | 32 | .align 8 |
| michael@0 | 33 | _STLP_atomic_increment: |
| michael@0 | 34 | 1: |
| michael@0 | 35 | ld [%o0], %o2 ! set the current |
| michael@0 | 36 | add %o2, 0x1, %o3 ! Increment and store current |
| michael@0 | 37 | ! swap [%o0], %o3 ! Do the compare and swap |
| michael@0 | 38 | cas [%o0], %o2, %o3 |
| michael@0 | 39 | cmp %o3, %o2 ! Check whether successful |
| michael@0 | 40 | bne 1b ! Retry if we failed. |
| michael@0 | 41 | membar #LoadLoad | #LoadStore ! Ensure the cas finishes before |
| michael@0 | 42 | ! returning |
| michael@0 | 43 | nop |
| michael@0 | 44 | retl ! return |
| michael@0 | 45 | nop |
| michael@0 | 46 | |
| michael@0 | 47 | .size _STLP_atomic_increment,(.-_STLP_atomic_increment) |
| michael@0 | 48 | |
| michael@0 | 49 | |
| michael@0 | 50 | /* int _STLP_atomic_decrement (void *pvalue) */ |
| michael@0 | 51 | .type _STLP_atomic_decrement,#function |
| michael@0 | 52 | .global _STLP_atomic_decrement |
| michael@0 | 53 | .align 8 |
| michael@0 | 54 | |
| michael@0 | 55 | _STLP_atomic_decrement: |
| michael@0 | 56 | 2: |
| michael@0 | 57 | ld [%o0], %o2 ! set the current |
| michael@0 | 58 | sub %o2, 0x1, %o3 ! decrement and store current |
| michael@0 | 59 | ! swap [%o0], %o3 ! Do the compare and swap |
| michael@0 | 60 | cas [%o0], %o2, %o3 |
| michael@0 | 61 | cmp %o3, %o2 ! Check whether successful |
| michael@0 | 62 | bne 2b ! Retry if we failed. |
| michael@0 | 63 | membar #LoadLoad | #LoadStore ! Ensure the cas finishes before |
| michael@0 | 64 | nop |
| michael@0 | 65 | ! returning |
| michael@0 | 66 | retl ! return |
| michael@0 | 67 | nop |
| michael@0 | 68 | .size _STLP_atomic_decrement,(.-_STLP_atomic_decrement) |
