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: // PRInt32 _MD_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 _MD_AtomicIncrement
michael@0:     .align 4
michael@0: _MD_AtomicIncrement:
michael@0:     movl $1, %eax
michael@0:     lock
michael@0:     xaddl %eax, (%rdi)
michael@0:     incl %eax
michael@0:     ret
michael@0: 
michael@0: // PRInt32 _MD_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 _MD_AtomicDecrement
michael@0:     .align 4
michael@0: _MD_AtomicDecrement:
michael@0:     movl $-1, %eax
michael@0:     lock
michael@0:     xaddl %eax, (%rdi)
michael@0:     decl %eax
michael@0:     ret
michael@0: 
michael@0: // PRInt32 _MD_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 _MD_AtomicSet
michael@0:     .align 4
michael@0: _MD_AtomicSet:
michael@0:     movl %esi, %eax
michael@0:     xchgl %eax, (%rdi)
michael@0:     ret
michael@0: 
michael@0: // PRInt32 _MD_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 _MD_AtomicAdd
michael@0:     .align 4
michael@0: _MD_AtomicAdd:
michael@0:     movl %esi, %eax
michael@0:     lock
michael@0:     xaddl %eax, (%rdi)
michael@0:     addl %esi, %eax
michael@0:     ret