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103 lines
2.2 KiB
ArmAsm
103 lines
2.2 KiB
ArmAsm
/* Copyright (C) 2003-2012 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <shlib-compat.h>
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#include <pthread-errnos.h>
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#include <lowlevellock.h>
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#include "lowlevel-atomic.h"
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.text
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.globl __new_sem_trywait
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.type __new_sem_trywait,@function
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.align 5
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cfi_startproc
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__new_sem_trywait:
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mov.l r12, @-r15
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cfi_adjust_cfa_offset (4)
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cfi_rel_offset (r12, 0)
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mov.l r8, @-r15
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cfi_adjust_cfa_offset (4)
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cfi_rel_offset (r8, 0)
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sts.l pr, @-r15
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cfi_adjust_cfa_offset (4)
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cfi_rel_offset (pr, 0)
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mov r4, r8
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mov.l @r8, r0
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2:
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tst r0, r0
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bt 1f
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mov r0, r3
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mov r0, r4
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add #-1, r3
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CMPXCHG (r4, @r8, r3, r2)
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bf/s 2b
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mov r2, r0
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cfi_remember_state
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lds.l @r15+, pr
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cfi_adjust_cfa_offset (-4)
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cfi_restore (pr)
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mov.l @r15+, r8
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cfi_adjust_cfa_offset (-4)
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cfi_restore (r8)
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mov.l @r15+, r12
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cfi_adjust_cfa_offset (-4)
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cfi_restore (r12)
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rts
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mov #0, r0
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cfi_restore_state
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1:
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mov #EAGAIN, r8
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mova .Lgot1, r0
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mov.l .Lgot1, r12
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add r0, r12
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mov.l .Lerrno1, r0
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stc gbr, r1
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mov.l @(r0, r12), r0
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bra .Lexit
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add r1, r0
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.align 2
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.Lerrno1:
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.long errno@GOTTPOFF
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.Lexit:
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mov.l r8, @r0
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lds.l @r15+, pr
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cfi_adjust_cfa_offset (-4)
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cfi_restore (pr)
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mov.l @r15+, r8
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cfi_adjust_cfa_offset (-4)
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cfi_restore (r8)
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mov.l @r15+, r12
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cfi_adjust_cfa_offset (-4)
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cfi_restore (r12)
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rts
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mov #-1, r0
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cfi_endproc
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.align 2
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.Lgot1:
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.long _GLOBAL_OFFSET_TABLE_
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.size __new_sem_trywait,.-__new_sem_trywait
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versioned_symbol(libpthread, __new_sem_trywait, sem_trywait, GLIBC_2_1)
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