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- #include <sysdep.h>
- #include <lowlevelrwlock.h>
- #include "lowlevel-atomic.h"
- #define FUTEX_WAIT 0
- #define FUTEX_WAKE 1
- .text
- .globl __pthread_rwlock_unlock
- .type __pthread_rwlock_unlock,@function
- .align 5
- __pthread_rwlock_unlock:
- mov.l r12, @-r15
- mov.l r8, @-r15
- sts.l pr, @-r15
- mov r4, r8
-
- mov #0, r3
- mov #1, r4
- #if MUTEX == 0
- CMPXCHG (r3, @r8, r4, r2)
- #else
- CMPXCHG (r3, @(MUTEX,r8), r4, r2)
- #endif
- bf 1f
- 2:
- mov.l @(WRITER,r8), r0
- tst r0, r0
- bf 5f
- mov.l @(NR_READERS,r8), r0
- add #-1, r0
- mov.l r0, @(NR_READERS,r8)
- tst r0, r0
- bf 6f
- 5:
- mov #0, r0
- mov.l r0, @(WRITER,r8)
- mov #1, r6
- mov r8, r4
- add #WRITERS_WAKEUP, r4
- mov.l @(WRITERS_QUEUED,r8), r0
- tst r0, r0
- bf 0f
-
- mov.l @(READERS_QUEUED,r8), r0
- tst r0, r0
- bt 6f
- mov #-1, r6
- shlr r6
- mov r8, r4
- add #READERS_WAKEUP, r4
- 0:
- mov.l @r4, r0
- add #1, r0
- mov.l r0, @r4
- #if MUTEX == 0
- DEC (@r8, r2)
- #else
- DEC (@(MUTEX,r8), r2)
- #endif
- tst r2, r2
- bf 7f
- 8:
- mov #FUTEX_WAKE, r5
- mov #SYS_futex, r3
- mov #0, r7
- extu.b r3, r3
- trapa #0x14
- SYSCALL_INST_PAD
- lds.l @r15+, pr
- mov.l @r15+, r8
- mov.l @r15+, r12
- rts
- mov #0, r0
- 6:
- #if MUTEX == 0
- DEC (@r8, r2)
- #else
- DEC (@(MUTEX,r8), r2)
- #endif
- tst r2, r2
- bf 3f
- 4:
- lds.l @r15+, pr
- mov.l @r15+, r8
- mov.l @r15+, r12
- rts
- mov #0, r0
- 1:
- mov r8, r5
- #if MUTEX != 0
- add #MUTEX, r5
- #endif
- mov r2, r4
- mov.l .Lwait8, r1
- bsrf r1
- nop
- .Lwait8b:
- bra 2b
- nop
- 3:
- mov r8, r4
- #if MUTEX != 0
- add #MUTEX, r4
- #endif
- mov.l .Lwake8, r1
- bsrf r1
- nop
- .Lwake8b:
- bra 4b
- nop
- 7:
- mov.l r4, @-r15
- mov.l r6, @-r15
- mov r8, r4
- #if MUTEX != 0
- add #MUTEX, r4
- #endif
- mov.l .Lwake9, r1
- bsrf r1
- nop
- .Lwake9b:
- mov.l @r15+, r6
- bra 8b
- mov.l @r15+, r4
- .align 2
- .Lwait8:
- .long __lll_mutex_lock_wait-.Lwait8b
- .Lwake8:
- .long __lll_mutex_unlock_wake-.Lwake8b
- .Lwake9:
- .long __lll_mutex_unlock_wake-.Lwake9b
- .size __pthread_rwlock_unlock,.-__pthread_rwlock_unlock
- .globl pthread_rwlock_unlock
- pthread_rwlock_unlock = __pthread_rwlock_unlock
- .globl __pthread_rwlock_unlock_internal
- __pthread_rwlock_unlock_internal = __pthread_rwlock_unlock
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