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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/.

// 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 $1, %eax

    lock

    xaddl %eax, (%rdi)

    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 $-1, %eax

    lock

    xaddl %eax, (%rdi)

    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.

//

    .text

    .globl _MD_AtomicSet

    .align 4

_MD_AtomicSet:

    movl %esi, %eax

    xchgl %eax, (%rdi)

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 %esi, %eax

    lock

    xaddl %eax, (%rdi)

    addl %esi, %eax

ret