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# -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# Based on the programming examples in The PowerPC Architecture:
# A Specification for A New Family of RISC Processors, 2nd Ed.,
# Book I, Section E.1, "Synchronization," pp. 249-256, May 1994.
#
.text
#
# PRInt32 __PR_DarwinPPC_AtomicIncrement(PRInt32 *val);
#
.align 2
.globl __PR_DarwinPPC_AtomicIncrement
.private_extern __PR_DarwinPPC_AtomicIncrement
__PR_DarwinPPC_AtomicIncrement:
lwarx r4,0,r3
addi r0,r4,1
stwcx. r0,0,r3
bne- __PR_DarwinPPC_AtomicIncrement
mr r3,r0
blr
#
# PRInt32 __PR_DarwinPPC_AtomicDecrement(PRInt32 *val);
#
.align 2
.globl __PR_DarwinPPC_AtomicDecrement
.private_extern __PR_DarwinPPC_AtomicDecrement
__PR_DarwinPPC_AtomicDecrement:
lwarx r4,0,r3
addi r0,r4,-1
stwcx. r0,0,r3
bne- __PR_DarwinPPC_AtomicDecrement
mr r3,r0
blr
#
# PRInt32 __PR_DarwinPPC_AtomicSet(PRInt32 *val, PRInt32 newval);
#
.align 2
.globl __PR_DarwinPPC_AtomicSet
.private_extern __PR_DarwinPPC_AtomicSet
__PR_DarwinPPC_AtomicSet:
lwarx r5,0,r3
stwcx. r4,0,r3
bne- __PR_DarwinPPC_AtomicSet
mr r3,r5
blr
#
# PRInt32 __PR_DarwinPPC_AtomicAdd(PRInt32 *ptr, PRInt32 val);
#
.align 2
.globl __PR_DarwinPPC_AtomicAdd
.private_extern __PR_DarwinPPC_AtomicAdd
__PR_DarwinPPC_AtomicAdd:
lwarx r5,0,r3
add r0,r4,r5
stwcx. r0,0,r3
bne- __PR_DarwinPPC_AtomicAdd
mr r3,r0
blr
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