libgo/go/runtime/lfstack_32bit.go

   1 // Copyright 2014 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 // +build 386 arm nacl armbe m68k mips mipsle mips64p32 mips64p32le mipso32 mipsn32 ppc s390 sparc
   6
   7 package runtime
   8
   9 import "unsafe"
  10
  11 // On 32-bit systems, the stored uint64 has a 32-bit pointer and 32-bit count.
  12
  13 func lfstackPack(node *lfnode, cnt uintptr) uint64 {
  14         return uint64(uintptr(unsafe.Pointer(node)))<<32 | uint64(cnt)
  15 }
  16
  17 func lfstackUnpack(val uint64) *lfnode {
  18         return (*lfnode)(unsafe.Pointer(uintptr(val >> 32)))
  19 }