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 os_Linux_x86.s
michael@0: #
michael@0: 
michael@0: #
michael@0: # PRInt32 __PR_Darwin_x86_AtomicIncrement(PRInt32 *val);
michael@0: #
michael@0: # Atomically increment the integer pointed to by 'val' and return
michael@0: # the result of the increment.
michael@0: #
michael@0:     .text
michael@0:     .globl __PR_Darwin_x86_AtomicIncrement
michael@0:     .private_extern __PR_Darwin_x86_AtomicIncrement
michael@0:     .align 4
michael@0: __PR_Darwin_x86_AtomicIncrement:
michael@0:     movl 4(%esp), %ecx
michael@0:     movl $1, %eax
michael@0:     lock
michael@0:     xaddl %eax, (%ecx)
michael@0:     incl %eax
michael@0:     ret
michael@0: 
michael@0: #
michael@0: # PRInt32 __PR_Darwin_x86_AtomicDecrement(PRInt32 *val);
michael@0: #
michael@0: # Atomically decrement the integer pointed to by 'val' and return
michael@0: # the result of the decrement.
michael@0: #
michael@0:     .text
michael@0:     .globl __PR_Darwin_x86_AtomicDecrement
michael@0:     .private_extern __PR_Darwin_x86_AtomicDecrement
michael@0:     .align 4
michael@0: __PR_Darwin_x86_AtomicDecrement:
michael@0:     movl 4(%esp), %ecx
michael@0:     movl $-1, %eax
michael@0:     lock
michael@0:     xaddl %eax, (%ecx)
michael@0:     decl %eax
michael@0:     ret
michael@0: 
michael@0: #
michael@0: # PRInt32 __PR_Darwin_x86_AtomicSet(PRInt32 *val, PRInt32 newval);
michael@0: #
michael@0: # Atomically set the integer pointed to by 'val' to the new
michael@0: # value 'newval' and return the old value.
michael@0: #
michael@0:     .text
michael@0:     .globl __PR_Darwin_x86_AtomicSet
michael@0:     .private_extern __PR_Darwin_x86_AtomicSet
michael@0:     .align 4
michael@0: __PR_Darwin_x86_AtomicSet:
michael@0:     movl 4(%esp), %ecx
michael@0:     movl 8(%esp), %eax
michael@0:     xchgl %eax, (%ecx)
michael@0:     ret
michael@0: 
michael@0: #
michael@0: # PRInt32 __PR_Darwin_x86_AtomicAdd(PRInt32 *ptr, PRInt32 val);
michael@0: #
michael@0: # Atomically add 'val' to the integer pointed to by 'ptr'
michael@0: # and return the result of the addition.
michael@0: #
michael@0:     .text
michael@0:     .globl __PR_Darwin_x86_AtomicAdd
michael@0:     .private_extern __PR_Darwin_x86_AtomicAdd
michael@0:     .align 4
michael@0: __PR_Darwin_x86_AtomicAdd:
michael@0:     movl 4(%esp), %ecx
michael@0:     movl 8(%esp), %eax
michael@0:     movl %eax, %edx
michael@0:     lock
michael@0:     xaddl %eax, (%ecx)
michael@0:     addl %edx, %eax
michael@0:     ret