os_Darwin_x86.s - mozsearch

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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 os_Linux_x86.s

# PRInt32 __PR_Darwin_x86_AtomicIncrement(PRInt32 *val);

# Atomically increment the integer pointed to by 'val' and return

# the result of the increment.

    .text

    .globl __PR_Darwin_x86_AtomicIncrement

    .private_extern __PR_Darwin_x86_AtomicIncrement

    .align 4

__PR_Darwin_x86_AtomicIncrement:

    movl 4(%esp), %ecx

    movl $1, %eax

    lock

    xaddl %eax, (%ecx)

    incl %eax

ret

# PRInt32 __PR_Darwin_x86_AtomicDecrement(PRInt32 *val);

# Atomically decrement the integer pointed to by 'val' and return

# the result of the decrement.

    .text

    .globl __PR_Darwin_x86_AtomicDecrement

    .private_extern __PR_Darwin_x86_AtomicDecrement

    .align 4

__PR_Darwin_x86_AtomicDecrement:

    movl 4(%esp), %ecx

    movl $-1, %eax

    lock

    xaddl %eax, (%ecx)

    decl %eax

ret

# PRInt32 __PR_Darwin_x86_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 __PR_Darwin_x86_AtomicSet

    .private_extern __PR_Darwin_x86_AtomicSet

    .align 4

__PR_Darwin_x86_AtomicSet:

    movl 4(%esp), %ecx

    movl 8(%esp), %eax

    xchgl %eax, (%ecx)

ret

# PRInt32 __PR_Darwin_x86_AtomicAdd(PRInt32 *ptr, PRInt32 val);

# Atomically add 'val' to the integer pointed to by 'ptr'

# and return the result of the addition.

    .text

    .globl __PR_Darwin_x86_AtomicAdd

    .private_extern __PR_Darwin_x86_AtomicAdd

    .align 4

__PR_Darwin_x86_AtomicAdd:

    movl 4(%esp), %ecx

    movl 8(%esp), %eax

    movl %eax, %edx

    lock

    xaddl %eax, (%ecx)

    addl %edx, %eax

ret