runtime: change lfstack support to taggedPointer

This is a refactoring with no change in behavior, in preparation
for future netpoll work.

For #59545

Change-Id: I493c5fd0f49f31b75787f7b5b89c544bed73f64f
Reviewed-on: https://go-review.googlesource.com/c/go/+/484836
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Orlando Labao <orlando.labao43@gmail.com>

1 files changed, 0 insertions, 19 deletions

diff --git a/src/runtime/lfstack_32bit.go b/src/runtime/lfstack_32bit.go
deleted file mode 100644
index 405923cc34..0000000000
--- a/src/runtime/lfstack_32bit.go
+++ /dev/null
@@ -1,19 +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.
-
-//go:build 386 || arm || mips || mipsle
-
-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)))
-}