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