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- /* Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
- #include <sysdep.h>
- #include <pthread-errnos.h>
- #include <lowlevellock.h>
- #include "lowlevel-atomic.h"
- .text
- .globl sem_trywait
- .type sem_trywait,@function
- .align 5
- sem_trywait:
- mov.l r12, @-r15
- mov.l r8, @-r15
- sts.l pr, @-r15
- mov r4, r8
- mov.l @r8, r0
- 2:
- tst r0, r0
- bt 1f
- mov r0, r3
- mov r0, r4
- add #-1, r3
- CMPXCHG (r4, @r8, r3, r2)
- bf/s 2b
- mov r2, r0
- lds.l @r15+, pr
- mov.l @r15+, r8
- mov.l @r15+, r12
- rts
- mov #0, r0
- 1:
- mov #EAGAIN, r8
- mova .Lgot1, r0
- mov.l .Lgot1, r12
- add r0, r12
- #if USE___THREAD
- mov.l .Lerrno1, r0
- stc gbr, r1
- mov.l @(r0, r12), r0
- bra .Lexit
- add r1, r0
- .align 2
- .Lerrno1:
- .long errno@GOTTPOFF
- .Lexit:
- #else
- mov.l .Lerrloc1, r1
- bsrf r1
- nop
- .Lerrloc1b:
- #endif
- mov.l r8, @r0
- lds.l @r15+, pr
- mov.l @r15+, r8
- mov.l @r15+, r12
- rts
- mov #-1, r0
- .align 2
- .Lgot1:
- .long _GLOBAL_OFFSET_TABLE_
- #if !USE___THREAD
- .Lerrloc1:
- .long __errno_location@PLT-(.Lerrloc1b-.)
- #endif
- .size sem_trywait,.-sem_trywait
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