From 09d92b6bbf26f195a1fe136513238d227bc73f82 Mon Sep 17 00:00:00 2001 From: Russ Cox Date: Fri, 5 Dec 2014 19:13:20 -0500 Subject: all: power64 is now ppc64 Fixes #8654. LGTM=austin R=austin CC=golang-codereviews https://golang.org/cl/180600043 --- src/runtime/lfstack_linux_ppc64x.go | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 src/runtime/lfstack_linux_ppc64x.go (limited to 'src/runtime/lfstack_linux_ppc64x.go') diff --git a/src/runtime/lfstack_linux_ppc64x.go b/src/runtime/lfstack_linux_ppc64x.go new file mode 100644 index 0000000000..7ed5025584 --- /dev/null +++ b/src/runtime/lfstack_linux_ppc64x.go @@ -0,0 +1,32 @@ +// 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 ppc64 ppc64le +// +build linux + +package runtime + +import "unsafe" + +// On ppc64, Linux limits the user address space to 46 bits (see +// TASK_SIZE_USER64 in the Linux kernel). This has grown over time, +// so here we allow 48 bit addresses. +// +// 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<