glibc/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.S
Ulrich Drepper 41d4d22399 Update.
* sysdeps/i386/i486/bits/atomic.h: Fix a few unused definitions.

	* sysdeps/unix/sysv/linux/i386/lowlevellock.h: Remove all trace of
	lll_wake_tid.  This was used only to work around kernel limits in
	the early days.
	* sysdeps/unix/sysv/linux/s390/lowlevellock.h: Likewise.
	* sysdeps/unix/sysv/linux/sh/libc-lowlevellock.S: Likewise.
	* sysdeps/unix/sysv/linux/sh/lowlevellock.S: Likewise.
	* sysdeps/unix/sysv/linux/sh/lowlevellock.h: Likewise.
2003-03-07 18:37:10 +00:00

206 lines
3.5 KiB
ArmAsm

/* Copyright (C) 2003 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 "lowlevel-atomic.h"
.text
#define SYS_gettimeofday __NR_gettimeofday
#define SYS_futex 240
#define FUTEX_WAIT 0
#define FUTEX_WAKE 1
#define ETIMEDOUT 110
.globl __lll_lock_wait
.type __lll_lock_wait,@function
.hidden __lll_lock_wait
.align 5
__lll_lock_wait:
mov r4, r6
mov r5, r4
mov #0, r7 /* No timeout. */
mov #FUTEX_WAIT, r5
2:
add #-1, r6 /* account for the preceeded xadd. */
mov #SYS_futex, r3
extu.b r3, r3
trapa #0x14
SYSCALL_INST_PAD
mov #-1, r3
XADD (r3, @r4, r2)
tst r3, r3
bf/s 2b
mov r2, r6
mov #-1, r1
mov.l r1, @r4
rts
mov r2, r0
.size __lll_lock_wait,.-__lll_lock_wait
.globl lll_unlock_wake_cb
.type lll_unlock_wake_cb,@function
.hidden lll_unlock_wake_cb
.align 5
lll_unlock_wake_cb:
.align 2
mova 1f, r0
mov r15, r1
mov #-6, r15
0:
mov.l @r4, r2
add #1, r2
mov.l r2, @r4
1:
mov r1, r15
cmp/pl r2
bf 2f
rts
nop
.size lll_unlock_wake_cb,.-lll_unlock_wake_cb
.globl __lll_unlock_wake
.type __lll_unlock_wake,@function
.hidden __lll_unlock_wake
__lll_unlock_wake:
2:
mov #FUTEX_WAKE, r5
mov #1, r6 /* Wake one thread. */
mov #0, r7
mov.l r6, @r4 /* Stores 1. */
mov #SYS_futex, r3
extu.b r3, r3
trapa #0x14
SYSCALL_INST_PAD
rts
nop
.size __lll_unlock_wake,.-__lll_unlock_wake
.globl __lll_wait_tid
.type __lll_wait_tid,@function
.hidden __lll_wait_tid
__lll_wait_tid:
mov.l @r4, r6
1:
mov #FUTEX_WAIT, r5
mov #0, r7
mov #SYS_futex, r3
extu.b r3, r3
trapa #0x14
SYSCALL_INST_PAD
mov r0, r1
mov.l @r4, r0
tst r0, r0
bf/s 1b
mov r0, r6
rts
nop
.size __lll_wait_tid,.-__lll_wait_tid
.globl __lll_timedwait_tid
.type __lll_timedwait_tid,@function
.hidden __lll_timedwait_tid
__lll_timedwait_tid:
mov.l r9, @-r15
mov.l r8, @-r15
mov r4, r8
mov r5, r9
add #-8, r15
2:
/* Get current time. */
mov r15, r4
mov #0, r5
mov #SYS_gettimeofday, r3
trapa #0x12
SYSCALL_INST_PAD
/* Compute relative timeout. */
mov.l @(4,r15), r0
mov.w .L1k, r1
dmulu.l r0, r1 /* Milli seconds to nano seconds. */
mov.l @r9, r2
mov.l @(4,r9), r3
mov.l @r15, r0
sts macl, r1
sub r0, r2
clrt
subc r1, r3
bf 5f
mov.l .L1g, r1
add r1, r3
add #-1, r2
5:
cmp/pz r2
bf 6f /* Time is already up. */
mov.l r2, @r15 /* Store relative timeout. */
mov.l r3, @(4,r15)
mov.l @r8, r6
tst r6, r6
bt 4f
mov r8, r4
mov #FUTEX_WAIT, r5
mov r15, r7
mov #SYS_futex, r3
extu.b r3, r3
trapa #0x14
SYSCALL_INST_PAD
mov r0, r1
mov.l @r8, r0
tst r0, r0
bf 1f
4:
mov #0, r0
3:
add #8, r15
mov.l @r15+, r8
rts
mov.l @r15+, r9
1:
mov #-ETIMEDOUT, r1
cmp/eq r0, r1
bf 2b
6:
bra 3b
mov #ETIMEDOUT, r0
.L1k:
.word 1000
.align 2
.L1g:
.long 1000000000
.size __lll_timedwait_tid,.-__lll_timedwait_tid