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- /* Copyright (C) 2003, 2004, 2007, 2008 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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- #include <sysdep.h>
- #include <pthread-errnos.h>
- #include <structsem.h>
- #include <lowlevellock.h>
- #include "lowlevel-atomic.h"
- .text
- .globl sem_post
- .type sem_post,@function
- .align 5
- sem_post:
- mov.l @(VALUE,r4), r2
- 0:
- mov.l .Lmax, r1
- cmp/eq r1, r2
- bt/s 3f
- mov r2, r3
- mov r3, r5
- add #1, r5
- CMPXCHG (r3, @(VALUE,r4), r5, r2)
- bf 0b
- mov.l @(NWAITERS,r4), r2
- tst r2, r2
- bt 2f
- mov #FUTEX_WAKE, r5
- mov.l @(PRIVATE,r4), r1
- or r1, r5
- mov #1, r6
- mov #0, r7
- mov #SYS_futex, r3
- extu.b r3, r3
- trapa #0x14
- SYSCALL_INST_PAD
- cmp/pz r0
- bf 1f
- 2:
- rts
- mov #0, r0
- 1:
- bra 4f
- mov #EINVAL, r2
- 3:
- mov #EOVERFLOW, r2
- 4:
- mov.l r12, @-r15
- mov.l r8, @-r15
- sts.l pr, @-r15
- mova .Lgot3, r0
- mov.l .Lgot3, r12
- add r0, r12
- #if USE___THREAD
- mov.l .Lerrno3, r0
- stc gbr, r1
- mov.l @(r0, r12), r0
- bra .Lexit
- add r1, r0
- .align 2
- .Lerrno3:
- .long errno@GOTTPOFF
- .Lexit:
- mov.l r2, @r0
- #else
- mov r2, r8
- mov.l .Lerrloc3, r1
- bsrf r1
- nop
- .Lerrloc3b:
- mov r8, @r0
- #endif
- lds.l @r15+, pr
- mov.l @r15+, r8
- mov.l @r15+, r12
- rts
- mov #-1, r0
- .align 2
- .Lmax:
- .long SEM_VALUE_MAX
- .Lgot3:
- .long _GLOBAL_OFFSET_TABLE_
- #if !USE___THREAD
- .Lerrloc3:
- .long __errno_location@PLT-(.Lerrloc3b-.)
- #endif
- .size sem_post,.-sem_post
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