756 lines
13 KiB
ArmAsm
756 lines
13 KiB
ArmAsm
/* Copyright (C) 2003, 2004, 2006, 2007 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <sysdep.h>
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#include <shlib-compat.h>
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#include <lowlevellock.h>
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#include <lowlevelcond.h>
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#include <tcb-offsets.h>
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#include <kernel-features.h>
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#include "lowlevel-atomic.h"
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.text
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/* int pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex) */
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.globl __pthread_cond_wait
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.type __pthread_cond_wait, @function
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.align 5
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__pthread_cond_wait:
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.LSTARTCODE:
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mov.l r8, @-r15
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.Lpush_r8:
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mov.l r9, @-r15
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.Lpush_r9:
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mov.l r10, @-r15
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.Lpush_r10:
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mov.l r11, @-r15
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.Lpush_r11:
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mov.l r12, @-r15
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.Lpush_r12:
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sts.l pr, @-r15
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.Lpush_pr:
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add #-48, r15
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.Lalloc:
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mov r4, r8
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mov r5, r9
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#ifdef PIC
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mova .Lgot0, r0
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mov.l .Lgot0, r12
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add r0, r12
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#endif
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/* Get internal lock. */
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mov #0, r3
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mov #1, r4
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#if cond_lock != 0
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CMPXCHG (r3, @(cond_lock,r8), r4, r2)
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#else
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CMPXCHG (r3, @r8, r4, r2)
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#endif
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bt 2f
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bra 1f
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nop
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#ifdef PIC
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.align 2
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.Lgot0:
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.long _GLOBAL_OFFSET_TABLE_
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#endif
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2:
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/* Store the reference to the mutex. If there is already a
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different value in there this is a bad user bug. */
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mov.l @(dep_mutex,r8),r0
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cmp/eq #-1, r0
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bt 15f
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mov.l r9, @(dep_mutex,r8)
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15:
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/* Unlock the mutex. */
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mov.l .Lmunlock0, r1
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mov #0, r5
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bsrf r1
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mov r9, r4
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.Lmunlock0b:
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tst r0, r0
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bt 0f
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bra 12f
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nop
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0:
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mov #1, r2
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mov #0, r3
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clrt
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mov.l @(total_seq,r8),r0
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mov.l @(total_seq+4,r8),r1
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addc r2, r0
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addc r3, r1
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mov.l r0,@(total_seq,r8)
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mov.l r1,@(total_seq+4,r8)
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mov.l @(cond_futex,r8),r0
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add r2, r0
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mov.l r0,@(cond_futex,r8)
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mov #(1 << nwaiters_shift), r2
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mov.l @(cond_nwaiters,r8), r0
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add r2, r0
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mov.l r0, @(cond_nwaiters,r8)
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/* Get and store current wakeup_seq value. */
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mov.l @(wakeup_seq,r8), r10
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mov.l @(wakeup_seq+4,r8), r11
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mov.l @(broadcast_seq,r8), r0
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mov.l r0, @(4,r15)
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8:
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mov.l @(cond_futex,r8),r0
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mov.l r0, @(8,r15)
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/* Unlock. */
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#if cond_lock != 0
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DEC (@(cond_lock,r8), r2)
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#else
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DEC (@r8, r2)
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#endif
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tst r2, r2
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bf 3f
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4:
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.LcleanupSTART:
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mov.l .Lenable0, r1
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bsrf r1
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nop
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.Lenable0b:
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mov.l r0, @r15
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mov #0, r7
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mov.l @(dep_mutex,r8), r0
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cmp/eq #-1, r0
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bt/s 99f
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mov #FUTEX_WAIT, r5
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#ifdef __ASSUME_PRIVATE_FUTEX
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mov #(FUTEX_WAIT|FUTEX_PRIVATE_FLAG), r5
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extu.b r5, r5
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#else
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stc gbr, r1
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mov.w .Lpfoff0, r2
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add r2, r1
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mov.l @r1, r5
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mov #FUTEX_WAIT, r0
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or r0, r5
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#endif
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99:
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mov.l @(8,r15), r6
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mov r8, r4
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add #cond_futex, r4
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mov #SYS_futex, r3
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extu.b r3, r3
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trapa #0x14
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SYSCALL_INST_PAD
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mov.l .Ldisable0, r1
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bsrf r1
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mov.l @r15, r4
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.Ldisable0b:
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.LcleanupEND:
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/* Lock. */
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mov #0, r3
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mov #1, r4
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#if cond_lock != 0
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CMPXCHG (r3, @(cond_lock,r8), r4, r2)
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#else
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CMPXCHG (r3, @r8, r4, r2)
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#endif
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bf 5f
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6:
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mov.l @(broadcast_seq,r8), r0
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mov.l @(4,r15), r1
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cmp/eq r0, r1
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bf 16f
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mov.l @(woken_seq,r8), r0
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mov.l @(woken_seq+4,r8), r1
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mov.l @(wakeup_seq,r8), r2
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mov.l @(wakeup_seq+4,r8), r3
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cmp/eq r3, r11
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bf 7f
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cmp/eq r2, r10
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bt 8b
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7:
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cmp/eq r1, r3
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bf 9f
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cmp/eq r0, r2
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bt 8b
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9:
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mov #1, r2
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mov #0, r3
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clrt
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mov.l @(woken_seq,r8),r0
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mov.l @(woken_seq+4,r8),r1
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addc r2, r0
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addc r3, r1
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mov.l r0,@(woken_seq,r8)
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mov.l r1,@(woken_seq+4,r8)
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16:
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mov #(1 << nwaiters_shift), r2
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mov.l @(cond_nwaiters,r8),r0
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sub r2, r0
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mov.l r0,@(cond_nwaiters,r8)
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/* Wake up a thread which wants to destroy the condvar object. */
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mov.l @(total_seq,r8),r0
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mov.l @(total_seq+4,r8),r1
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and r1, r0
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not r0, r0
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cmp/eq #0, r0
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bf/s 17f
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mov #((1 << nwaiters_shift) - 1), r1
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not r1, r1
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mov.l @(cond_nwaiters,r8),r0
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tst r1, r0
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bf 17f
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mov r8, r4
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add #cond_nwaiters, r4
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mov.l @(dep_mutex,r8), r0
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cmp/eq #-1, r0
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bt/s 99f
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mov #FUTEX_WAKE, r5
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#ifdef __ASSUME_PRIVATE_FUTEX
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mov #(FUTEX_WAKE|FUTEX_PRIVATE_FLAG), r5
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extu.b r5, r5
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#else
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stc gbr, r1
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mov.w .Lpfoff0, r2
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add r2, r1
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mov.l @r1, r5
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mov #FUTEX_WAKE, r0
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or r0, r5
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#endif
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99:
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mov #1, r6
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mov #0, r7
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mov #SYS_futex, r3
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extu.b r3, r3
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trapa #0x14
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SYSCALL_INST_PAD
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17:
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#if cond_lock != 0
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DEC (@(cond_lock,r8), r2)
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#else
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DEC (@r8, r2)
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#endif
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tst r2, r2
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bf 10f
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11:
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mov.l .Lmlocki0, r1
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bsrf r1
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mov r9, r4
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.Lmlocki0b:
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/* We return the result of the mutex_lock operation. */
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14:
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add #48, r15
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lds.l @r15+, pr
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mov.l @r15+, r12
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mov.l @r15+, r11
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mov.l @r15+, r10
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mov.l @r15+, r9
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rts
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mov.l @r15+, r8
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#ifndef __ASSUME_PRIVATE_FUTEX
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.Lpfoff0:
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.word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE
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#endif
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.align 2
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.Lmunlock0:
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.long __pthread_mutex_unlock_usercnt-.Lmunlock0b
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.Lenable0:
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.long __pthread_enable_asynccancel-.Lenable0b
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.Ldisable0:
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.long __pthread_disable_asynccancel-.Ldisable0b
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.Lmlocki0:
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.long __pthread_mutex_cond_lock-.Lmlocki0b
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1:
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/* Initial locking failed. */
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mov r8, r5
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#if cond_lock != 0
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add #cond_lock, r5
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#endif
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mov.l @(dep_mutex,r8), r0
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cmp/eq #-1, r0
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bf/s 99f
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mov #LLL_PRIVATE, r6
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mov #LLL_SHARED, r6
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99:
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extu.b r6, r6
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mov.l .Lwait0, r1
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bsrf r1
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mov r2, r4
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.Lwait0b:
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bra 2b
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nop
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3:
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/* Unlock in loop requires waekup. */
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mov r8, r4
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#if cond_lock != 0
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add #cond_lock, r4
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#endif
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mov.l @(dep_mutex,r8), r0
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cmp/eq #-1, r0
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bf/s 99f
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mov #LLL_PRIVATE, r5
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mov #LLL_SHARED, r5
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99:
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mov.l .Lwake0, r1
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bsrf r1
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extu.b r5, r5
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.Lwake0b:
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bra 4b
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nop
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5:
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/* Locking in loop failed. */
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mov r8, r5
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#if cond_lock != 0
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add #cond_lock, r5
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#endif
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mov.l @(dep_mutex,r8), r0
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cmp/eq #-1, r0
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bf/s 99f
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mov #LLL_PRIVATE, r6
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mov #LLL_SHARED, r6
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99:
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extu.b r6, r6
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mov.l .Lwait1, r1
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bsrf r1
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mov r2, r4
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.Lwait1b:
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bra 6b
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nop
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10:
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/* Unlock after loop requires wakeup. */
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mov r8, r4
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#if cond_lock != 0
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add #cond_lock, r4
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#endif
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mov.l @(dep_mutex,r8), r0
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cmp/eq #-1, r0
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bf/s 99f
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mov #LLL_PRIVATE, r5
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mov #LLL_SHARED, r5
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99:
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mov.l .Lwake1, r1
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bsrf r1
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extu.b r5, r5
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.Lwake1b:
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bra 11b
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nop
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12:
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/* The initial unlocking of the mutex failed. */
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mov.l r0, @(12,r15)
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#if cond_lock != 0
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DEC (@(cond_lock,r8), r2)
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#else
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DEC (@r8, r2)
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#endif
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tst r2, r2
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bf 13f
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mov r8, r4
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#if cond_lock != 0
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add #cond_lock, r4
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#endif
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mov.l @(dep_mutex,r8), r0
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cmp/eq #-1, r0
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bf/s 99f
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mov #LLL_PRIVATE, r5
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mov #LLL_SHARED, r5
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99:
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mov.l .Lwake2, r1
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bsrf r1
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extu.b r5, r5
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.Lwake2b:
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13:
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bra 14b
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mov.l @(12,r15), r0
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.align 2
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.Lwait0:
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.long __lll_lock_wait-.Lwait0b
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.Lwake0:
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.long __lll_unlock_wake-.Lwake0b
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.Lwait1:
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.long __lll_lock_wait-.Lwait1b
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.Lwake1:
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.long __lll_unlock_wake-.Lwake1b
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.Lwake2:
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.long __lll_unlock_wake-.Lwake2b
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.size __pthread_cond_wait, .-__pthread_cond_wait
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versioned_symbol (libpthread, __pthread_cond_wait, pthread_cond_wait,
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GLIBC_2_3_2)
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.type __condvar_w_cleanup, @function
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__condvar_w_cleanup:
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mov r4, r11
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/* Get internal lock. */
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mov #0, r3
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mov #1, r4
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#if cond_lock != 0
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CMPXCHG (r3, @(cond_lock,r8), r4, r2)
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#else
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CMPXCHG (r3, @r8, r4, r2)
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#endif
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bt 1f
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nop
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mov r8, r5
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#if cond_lock != 0
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add #cond_lock, r5
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#endif
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mov.l @(dep_mutex,r8), r0
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cmp/eq #-1, r0
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bf/s 99f
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mov #LLL_PRIVATE, r6
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mov #LLL_SHARED, r6
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99:
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extu.b r6, r6
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mov.l .Lwait3, r1
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bsrf r1
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mov r2, r4
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.Lwait3b:
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1:
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mov.l @(broadcast_seq,r8), r0
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mov.l @(4,r15), r1
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cmp/eq r0, r1
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bf 3f
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mov #1, r2
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mov #0, r3
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/* We increment the wakeup_seq counter only if it is lower than
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total_seq. If this is not the case the thread was woken and
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then canceled. In this case we ignore the signal. */
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mov.l @(total_seq+4,r8), r0
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mov.l @(wakeup_seq+4,r8), r1
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cmp/hi r1, r0
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bt/s 6f
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cmp/hi r0, r1
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bt 7f
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mov.l @(total_seq,r8), r0
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mov.l @(wakeup_seq,r8), r1
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cmp/hs r0, r1
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bt 7f
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6:
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clrt
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mov.l @(wakeup_seq,r8),r0
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mov.l @(wakeup_seq+4,r8),r1
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addc r2, r0
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addc r3, r1
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mov.l r0,@(wakeup_seq,r8)
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mov.l r1,@(wakeup_seq+4,r8)
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mov.l @(cond_futex,r8),r0
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add r2, r0
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mov.l r0,@(cond_futex,r8)
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7:
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clrt
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mov.l @(woken_seq,r8),r0
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mov.l @(woken_seq+4,r8),r1
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addc r2, r0
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addc r3, r1
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mov.l r0,@(woken_seq,r8)
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mov.l r1,@(woken_seq+4,r8)
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3:
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mov #(1 << nwaiters_shift), r2
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mov.l @(cond_nwaiters,r8),r0
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sub r2, r0
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mov.l r0,@(cond_nwaiters,r8)
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/* Wake up a thread which wants to destroy the condvar object. */
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mov #0, r10
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mov.l @(total_seq,r8),r0
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mov.l @(total_seq+4,r8),r1
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and r1, r0
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not r0, r0
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cmp/eq #0, r0
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bf/s 4f
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mov #((1 << nwaiters_shift) - 1), r1
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not r1, r1
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mov.l @(cond_nwaiters,r8),r0
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tst r1, r0
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bf 4f
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mov r8, r4
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add #cond_nwaiters, r4
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mov.l @(dep_mutex,r8), r0
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cmp/eq #-1, r0
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bt/s 99f
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mov #FUTEX_WAKE, r5
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#ifdef __ASSUME_PRIVATE_FUTEX
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mov #(FUTEX_WAKE|FUTEX_PRIVATE_FLAG), r5
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extu.b r5, r5
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#else
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stc gbr, r1
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mov.w .Lpfoff1, r2
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add r2, r1
|
|
mov.l @r1, r5
|
|
mov #FUTEX_WAKE, r0
|
|
or r0, r5
|
|
#endif
|
|
99:
|
|
mov #1, r6
|
|
mov #0, r7
|
|
mov #SYS_futex, r3
|
|
extu.b r3, r3
|
|
trapa #0x14
|
|
SYSCALL_INST_PAD
|
|
mov #1, r10
|
|
|
|
4:
|
|
#if cond_lock != 0
|
|
DEC (@(cond_lock,r8), r2)
|
|
#else
|
|
DEC (@r8, r2)
|
|
#endif
|
|
tst r2, r2
|
|
bt 2f
|
|
|
|
mov r8, r4
|
|
#if cond_lock != 0
|
|
add #cond_lock, r4
|
|
#endif
|
|
mov.l @(dep_mutex,r8), r0
|
|
cmp/eq #-1, r0
|
|
bf/s 99f
|
|
mov #LLL_PRIVATE, r5
|
|
mov #LLL_SHARED, r5
|
|
99:
|
|
mov.l .Lwake3, r1
|
|
bsrf r1
|
|
extu.b r5, r5
|
|
.Lwake3b:
|
|
|
|
2:
|
|
/* Wake up all waiters to make sure no signal gets lost. */
|
|
tst r10, r10
|
|
bf/s 5f
|
|
mov r8, r4
|
|
add #cond_futex, r4
|
|
mov.l @(dep_mutex,r8), r0
|
|
cmp/eq #-1, r0
|
|
bt/s 99f
|
|
mov #FUTEX_WAKE, r5
|
|
#ifdef __ASSUME_PRIVATE_FUTEX
|
|
mov #(FUTEX_WAKE|FUTEX_PRIVATE_FLAG), r5
|
|
extu.b r5, r5
|
|
#else
|
|
stc gbr, r1
|
|
mov.w .Lpfoff1, r2
|
|
add r2, r1
|
|
mov.l @r1, r5
|
|
mov #FUTEX_WAKE, r0
|
|
or r0, r5
|
|
#endif
|
|
99:
|
|
mov #-1, r6
|
|
shlr r6 /* r6 = 0x7fffffff */
|
|
mov #0, r7
|
|
mov #SYS_futex, r3
|
|
extu.b r3, r3
|
|
trapa #0x14
|
|
SYSCALL_INST_PAD
|
|
|
|
5:
|
|
mov.l .Lmlocki3, r1
|
|
bsrf r1
|
|
mov r9, r4
|
|
.Lmlocki3b:
|
|
|
|
.LcallUR:
|
|
mov.l .Lresume, r1
|
|
#ifdef PIC
|
|
add r12, r1
|
|
#endif
|
|
jsr @r1
|
|
mov r11, r4
|
|
sleep
|
|
|
|
#ifndef __ASSUME_PRIVATE_FUTEX
|
|
.Lpfoff1:
|
|
.word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE
|
|
#endif
|
|
.align 2
|
|
.Lwait3:
|
|
.long __lll_lock_wait-.Lwait3b
|
|
.Lwake3:
|
|
.long __lll_unlock_wake-.Lwake3b
|
|
.Lmlocki3:
|
|
.long __pthread_mutex_cond_lock-.Lmlocki3b
|
|
.Lresume:
|
|
#ifdef PIC
|
|
.long _Unwind_Resume@GOTOFF
|
|
#else
|
|
.long _Unwind_Resume
|
|
#endif
|
|
.LENDCODE:
|
|
.size __condvar_w_cleanup, .-__condvar_w_cleanup
|
|
|
|
|
|
.section .gcc_except_table,"a",@progbits
|
|
.LexceptSTART:
|
|
.byte 0xff ! @LPStart format (omit)
|
|
.byte 0xff ! @TType format (omit)
|
|
.byte 0x0b ! call-site format
|
|
! DW_EH_PE_sdata4
|
|
.uleb128 .Lcstend-.Lcstbegin
|
|
.Lcstbegin:
|
|
.ualong .LcleanupSTART-.LSTARTCODE
|
|
.ualong .LcleanupEND-.LcleanupSTART
|
|
.ualong __condvar_w_cleanup-.LSTARTCODE
|
|
.uleb128 0
|
|
.ualong .LcallUR-.LSTARTCODE
|
|
.ualong .LENDCODE-.LcallUR
|
|
.ualong 0
|
|
.uleb128 0
|
|
.Lcstend:
|
|
|
|
.section .eh_frame,"a",@progbits
|
|
.LSTARTFRAME:
|
|
.ualong .LENDCIE-.LSTARTCIE ! Length of the CIE.
|
|
.LSTARTCIE:
|
|
.ualong 0 ! CIE ID.
|
|
.byte 1 ! Version number.
|
|
#ifdef SHARED
|
|
.string "zPLR" ! NUL-terminated augmentation
|
|
! string.
|
|
#else
|
|
.string "zPL" ! NUL-terminated augmentation
|
|
! string.
|
|
#endif
|
|
.uleb128 1 ! Code alignment factor.
|
|
.sleb128 -4 ! Data alignment factor.
|
|
.byte 0x11 ! Return address register
|
|
! column.
|
|
#ifdef SHARED
|
|
.uleb128 7 ! Augmentation value length.
|
|
.byte 0x9b ! Personality: DW_EH_PE_pcrel
|
|
! + DW_EH_PE_sdata4
|
|
! + DW_EH_PE_indirect
|
|
.ualong DW.ref.__gcc_personality_v0-.
|
|
.byte 0x1b ! LSDA Encoding: DW_EH_PE_pcrel
|
|
! + DW_EH_PE_sdata4.
|
|
.byte 0x1b ! FDE Encoding: DW_EH_PE_pcrel
|
|
! + DW_EH_PE_sdata4.
|
|
#else
|
|
.uleb128 6 ! Augmentation value length.
|
|
.byte 0x0 ! Personality: absolute
|
|
.ualong __gcc_personality_v0
|
|
.byte 0x0 ! LSDA Encoding: absolute
|
|
#endif
|
|
.byte 0x0c ! DW_CFA_def_cfa
|
|
.uleb128 0xf
|
|
.uleb128 0
|
|
.align 2
|
|
.LENDCIE:
|
|
|
|
.ualong .LENDFDE-.LSTARTFDE ! Length of the FDE.
|
|
.LSTARTFDE:
|
|
.ualong .LSTARTFDE-.LSTARTFRAME ! CIE pointer.
|
|
#ifdef SHARED
|
|
.ualong .LSTARTCODE-. ! PC-relative start address
|
|
! of the code.
|
|
#else
|
|
.ualong .LSTARTCODE ! Start address of the code.
|
|
#endif
|
|
.ualong .LENDCODE-.LSTARTCODE ! Length of the code.
|
|
.uleb128 4 ! Augmentation size
|
|
#ifdef SHARED
|
|
.ualong .LexceptSTART-.
|
|
#else
|
|
.ualong .LexceptSTART
|
|
#endif
|
|
.byte 0x4
|
|
.ualong .Lpush_r8-.LSTARTCODE
|
|
.byte 0xe
|
|
.uleb128 4
|
|
.byte 0x88
|
|
.uleb128 1
|
|
.byte 0x4
|
|
.ualong .Lpush_r9-.Lpush_r8
|
|
.byte 0xe
|
|
.uleb128 8
|
|
.byte 0x89
|
|
.uleb128 2
|
|
.byte 0x4
|
|
.ualong .Lpush_r10-.Lpush_r9
|
|
.byte 0xe
|
|
.uleb128 12
|
|
.byte 0x8a
|
|
.uleb128 3
|
|
.byte 0x4
|
|
.ualong .Lpush_r11-.Lpush_r10
|
|
.byte 0xe
|
|
.uleb128 16
|
|
.byte 0x8b
|
|
.uleb128 4
|
|
.byte 0x4
|
|
.ualong .Lpush_r12-.Lpush_r11
|
|
.byte 0xe
|
|
.uleb128 20
|
|
.byte 0x8c
|
|
.uleb128 5
|
|
.byte 0x4
|
|
.ualong .Lpush_pr-.Lpush_r12
|
|
.byte 0xe
|
|
.uleb128 24
|
|
.byte 0x91
|
|
.uleb128 6
|
|
.byte 0x4
|
|
.ualong .Lalloc-.Lpush_pr
|
|
.byte 0xe
|
|
.uleb128 72
|
|
.align 2
|
|
.LENDFDE:
|
|
|
|
#ifdef SHARED
|
|
.hidden DW.ref.__gcc_personality_v0
|
|
.weak DW.ref.__gcc_personality_v0
|
|
.section .gnu.linkonce.d.DW.ref.__gcc_personality_v0,"aw",@progbits
|
|
.align 4
|
|
.type DW.ref.__gcc_personality_v0, @object
|
|
.size DW.ref.__gcc_personality_v0, 4
|
|
DW.ref.__gcc_personality_v0:
|
|
.long __gcc_personality_v0
|
|
#endif
|