mirror of git://sourceware.org/git/glibc.git
127 lines
2.6 KiB
ArmAsm
127 lines
2.6 KiB
ArmAsm
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/* Copyright (C) 2003 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 <lowlevelcond.h>
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#include "lowlevel-atomic.h"
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#define SYS_futex 240
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#define FUTEX_WAIT 0
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#define FUTEX_WAKE 1
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.text
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/* int pthread_cond_broadcast (pthread_cond_t *cond) */
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.globl __pthread_cond_broadcast
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.type __pthread_cond_broadcast, @function
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.align 5
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__pthread_cond_broadcast:
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mov.l r8, @-r15
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sts.l pr, @-r15
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mov r4, r8
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/* Get internal lock. */
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mov #1, r3
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#if cond_lock != 0
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XADD (r3, @(cond_lock,r8), r2)
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#else
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XADD (r3, @r8, r2)
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#endif
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tst r2, r2
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bf 1f
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2:
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mov.l @(total_seq+4,r8),r0
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mov.l @(total_seq,r8),r1
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mov.l @(wakeup_seq+4,r8), r2
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cmp/hi r2, r0
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bt 3f
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cmp/hi r0, r2
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bt 4f
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mov.l @(wakeup_seq,r8), r2
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cmp/hi r2, r1
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bf 4f
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3:
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/* Case all currently waiting threads to wake up. */
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mov.l r1, @(wakeup_seq,r8)
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mov.l r0, @(wakeup_seq+4,r8)
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/* Wake up all threads. */
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mov r8, r4
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add #wakeup_seq, r4
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mov #FUTEX_WAKE, r5
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mov #-1, r6
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shlr r6 /* r6 = 0x7fffffff */
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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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4:
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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 5f
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6:
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mov #0, r0
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lds.l @r15+, pr
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rts
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mov.l @r15+, r8
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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 .Lmwait5, r1
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bsrf r1
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mov r2, r4
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.Lmwait5b:
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bra 2b
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nop
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5:
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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 .Lmwake5, r1
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bsrf r1
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nop
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.Lmwake5b:
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bra 6b
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nop
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.align 2
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.Lmwait5:
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.long __lll_mutex_lock_wait-.Lmwait5b
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.Lmwake5:
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.long __lll_mutex_unlock_wake-.Lmwake5b
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.size __pthread_cond_broadcast, .-__pthread_cond_broadcast
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versioned_symbol (libpthread, __pthread_cond_broadcast, pthread_cond_broadcast,
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GLIBC_2_3_2)
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