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/ -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
/
/ The contents of this file are subject to the Mozilla Public
/ License Version 1.1 (the "License"); you may not use this file
/ except in compliance with the License. You may obtain a copy of
/ the License at http://www.mozilla.org/MPL/
/
/ Software distributed under the License is distributed on an "AS
/ IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
/ implied. See the License for the specific language governing
/ rights and limitations under the License.
/
/ The Original Code is the Netscape Portable Runtime (NSPR).
/
/ The Initial Developer of the Original Code is Netscape
/ Communications Corporation. Portions created by Netscape are
/ Copyright (C) 1998-2000 Netscape Communications Corporation. All
/ Rights Reserved.
/
/ Contributor(s):
/
/ Alternatively, the contents of this file may be used under the
/ terms of the GNU General Public License Version 2 or later (the
/ "GPL"), in which case the provisions of the GPL are applicable
/ instead of those above. If you wish to allow use of your
/ version of this file only under the terms of the GPL and not to
/ allow others to use your version of this file under the MPL,
/ indicate your decision by deleting the provisions above and
/ replace them with the notice and other provisions required by
/ the GPL. If you do not delete the provisions above, a recipient
/ may use your version of this file under either the MPL or the
/ GPL.
/
.text
.globl getedi
getedi:
movl %edi,%eax
ret
.type getedi,@function
.size getedi,.-getedi
.globl setedi
setedi:
movl 4(%esp),%edi
ret
.type setedi,@function
.size setedi,.-setedi
.globl __MD_FlushRegisterWindows
.globl _MD_FlushRegisterWindows
__MD_FlushRegisterWindows:
_MD_FlushRegisterWindows:
ret
/
/ sol_getsp()
/
/ Return the current sp (for debugging)
/
.globl sol_getsp
sol_getsp:
movl %esp, %eax
ret
/
/ sol_curthread()
/
/ Return a unique identifier for the currently active thread.
/
.globl sol_curthread
sol_curthread:
movl %ecx, %eax
ret
/ PRInt32 _MD_AtomicIncrement(PRInt32 *val)
/
/ Atomically increment the integer pointed to by 'val' and return
/ the result of the increment.
/
.text
.globl _MD_AtomicIncrement
.align 4
_MD_AtomicIncrement:
movl 4(%esp), %ecx
movl $1, %eax
lock
xaddl %eax, (%ecx)
incl %eax
ret
/ PRInt32 _MD_AtomicDecrement(PRInt32 *val)
/
/ Atomically decrement the integer pointed to by 'val' and return
/ the result of the decrement.
/
.text
.globl _MD_AtomicDecrement
.align 4
_MD_AtomicDecrement:
movl 4(%esp), %ecx
movl $-1, %eax
lock
xaddl %eax, (%ecx)
decl %eax
ret
/ PRInt32 _MD_AtomicSet(PRInt32 *val, PRInt32 newval)
/
/ Atomically set the integer pointed to by 'val' to the new
/ value 'newval' and return the old value.
/
/ An alternative implementation:
/ .text
/ .globl _MD_AtomicSet
/ .align 4
/_MD_AtomicSet:
/ movl 4(%esp), %ecx
/ movl 8(%esp), %edx
/ movl (%ecx), %eax
/retry:
/ lock
/ cmpxchgl %edx, (%ecx)
/ jne retry
/ ret
/
.text
.globl _MD_AtomicSet
.align 4
_MD_AtomicSet:
movl 4(%esp), %ecx
movl 8(%esp), %eax
lock
xchgl %eax, (%ecx)
ret
/ PRInt32 _MD_AtomicAdd(PRInt32 *ptr, PRInt32 val)
/
/ Atomically add 'val' to the integer pointed to by 'ptr'
/ and return the result of the addition.
/
.text
.globl _MD_AtomicAdd
.align 4
_MD_AtomicAdd:
movl 4(%esp), %ecx
movl 8(%esp), %eax
movl %eax, %edx
lock
xaddl %eax, (%ecx)
addl %edx, %eax
ret
/
/ PR_StackPush(listp, elementp)
/
/ Atomically push ElementP onto linked list ListP.
/
.text
.globl PR_StackPush
.align 4
PR_StackPush:
movl 4(%esp), %ecx
movl $-1,%eax
pulock:
/ Already locked?
cmpl %eax,(%ecx)
je pulock
/ Attempt to lock it
lock
xchgl %eax, (%ecx)
/ Did we set the lock?
cmpl $-1, %eax
je pulock
/ We now have the lock. Update pointers
movl 8(%esp), %edx
movl %eax, (%edx)
movl %edx, (%ecx)
/ Done
ret
/
/ elementp = PR_StackPop(listp)
/
/ Atomically pop ElementP off linked list ListP
/
.text
.globl PR_StackPop
.align 4
PR_StackPop:
movl 4(%esp), %ecx
movl $-1, %eax
polock:
/ Already locked?
cmpl %eax, (%ecx)
je polock
/ Attempt to lock it
lock
xchgl %eax, (%ecx)
/ Did we set the lock?
cmpl $-1, %eax
je polock
/ We set the lock so now update pointers
/ Was it empty?
movl $0, %edx
cmpl %eax,%edx
je empty
/ Get element "next" pointer
movl (%eax), %edx
/ Write NULL to the element "next" pointer
movl $0, (%eax)
empty:
/ Put elements previous "next" value into listp
/ NOTE: This also unlocks the listp
movl %edx, (%ecx)
/ Return previous listp value (already in eax)
ret
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