blob: 82d36f2d9677923d95fb6971944f6412ca475fa6 [file] [log] [blame]
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "runtime.h"
#include "textflag.h"
#pragma textflag NOSPLIT
uint32
runtime·atomicload(uint32 volatile* addr)
{
return *addr;
}
#pragma textflag NOSPLIT
void*
runtime·atomicloadp(void* volatile* addr)
{
return *addr;
}
#pragma textflag NOSPLIT
uint64
runtime·xadd64(uint64 volatile* addr, int64 v)
{
uint64 old;
do
old = *addr;
while(!runtime·cas64(addr, old, old+v));
return old+v;
}
#pragma textflag NOSPLIT
uint64
runtime·xchg64(uint64 volatile* addr, uint64 v)
{
uint64 old;
do
old = *addr;
while(!runtime·cas64(addr, old, v));
return old;
}