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author | Dave Cheney <dave@cheney.net> | 2016-04-07 14:05:06 +0000 |
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committer | Dave Cheney <dave@cheney.net> | 2016-04-07 14:05:24 +0000 |
commit | 9cc9e95b288648d796d92f0b92cb713b35f20062 (patch) | |
tree | e1b8ffa233ae66a9cdb9a0dfea10e151ef9be113 /src/runtime/lfstack_32bit.go | |
parent | 8448d3aace7f26bd6eca14e8b89c5a981c2ab9d3 (diff) | |
download | go-9cc9e95b288648d796d92f0b92cb713b35f20062.tar.gz go-9cc9e95b288648d796d92f0b92cb713b35f20062.zip |
Revert "runtime: merge lfstack{Pack,Unpack} into one file"
This broke solaris, which apparently does use the upper 17 bits of the address space.
This reverts commit 3b02c5b1b66df9cdb23d5a3243bb37b2c312ea1b.
Change-Id: Iedfe54abd0384960845468205f20191a97751c0b
Reviewed-on: https://go-review.googlesource.com/21652
Reviewed-by: Dave Cheney <dave@cheney.net>
Diffstat (limited to 'src/runtime/lfstack_32bit.go')
-rw-r--r-- | src/runtime/lfstack_32bit.go | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/runtime/lfstack_32bit.go b/src/runtime/lfstack_32bit.go new file mode 100644 index 0000000000..2f59e0212e --- /dev/null +++ b/src/runtime/lfstack_32bit.go @@ -0,0 +1,19 @@ +// Copyright 2014 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. + +// +build 386 arm nacl + +package runtime + +import "unsafe" + +// On 32-bit systems, the stored uint64 has a 32-bit pointer and 32-bit count. + +func lfstackPack(node *lfnode, cnt uintptr) uint64 { + return uint64(uintptr(unsafe.Pointer(node)))<<32 | uint64(cnt) +} + +func lfstackUnpack(val uint64) *lfnode { + return (*lfnode)(unsafe.Pointer(uintptr(val >> 32))) +} |