From 846ee0465bcb97d0c036e2366aa92b962d050aef Mon Sep 17 00:00:00 2001 From: Aram Hăvărneanu Date: Sun, 8 Mar 2015 14:20:20 +0100 Subject: runtime: add support for linux/arm64 Change-Id: Ibda6a5bedaff57fd161d63fc04ad260931d34413 Reviewed-on: https://go-review.googlesource.com/7142 Reviewed-by: Russ Cox --- src/runtime/lfstack_linux_arm64.go | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 src/runtime/lfstack_linux_arm64.go (limited to 'src/runtime/lfstack_linux_arm64.go') diff --git a/src/runtime/lfstack_linux_arm64.go b/src/runtime/lfstack_linux_arm64.go new file mode 100644 index 0000000000..54cae39fbc --- /dev/null +++ b/src/runtime/lfstack_linux_arm64.go @@ -0,0 +1,25 @@ +// 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" + +// 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. +const ( + addrBits = 48 + cntBits = 64 - addrBits + 3 +) + +func lfstackPack(node *lfnode, cnt uintptr) uint64 { + return uint64(uintptr(unsafe.Pointer(node)))<<(64-addrBits) | uint64(cnt&(1<> cntBits << 3))) + cnt = uintptr(val & (1<