diff options
Diffstat (limited to 'src/runtime/lfstack_amd64.go')
| -rw-r--r-- | src/runtime/lfstack_amd64.go | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/src/runtime/lfstack_amd64.go b/src/runtime/lfstack_amd64.go deleted file mode 100644 index 6397e1d47f..0000000000 --- a/src/runtime/lfstack_amd64.go +++ /dev/null @@ -1,22 +0,0 @@ -// 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. - -package runtime - -import "unsafe" - -// On AMD64, virtual addresses are 48-bit numbers sign extended to 64. -// We shift the address left 16 to eliminate the sign extended part and make -// room in the bottom for the count. -// In addition to the 16 bits taken from the top, we can take 3 from the -// bottom, because node must be pointer-aligned, giving a total of 19 bits -// of count. - -func lfstackPack(node *lfnode, cnt uintptr) uint64 { - return uint64(uintptr(unsafe.Pointer(node)))<<16 | uint64(cnt&(1<<19-1)) -} - -func lfstackUnpack(val uint64) *lfnode { - return (*lfnode)(unsafe.Pointer(uintptr(int64(val) >> 19 << 3))) -} |