001/* 002 * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved. 003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 004 * 005 * This code is free software; you can redistribute it and/or modify it 006 * under the terms of the GNU General Public License version 2 only, as 007 * published by the Free Software Foundation. 008 * 009 * This code is distributed in the hope that it will be useful, but WITHOUT 010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 011 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 012 * version 2 for more details (a copy is included in the LICENSE file that 013 * accompanied this code). 014 * 015 * You should have received a copy of the GNU General Public License version 016 * 2 along with this work; if not, write to the Free Software Foundation, 017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 018 * 019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 020 * or visit www.oracle.com if you need additional information or have any 021 * questions. 022 */ 023package com.oracle.graal.hotspot.meta; 024 025import jdk.internal.jvmci.code.*; 026 027/** 028 * Special registers reserved by HotSpot for frequently used values. 029 */ 030public interface HotSpotRegistersProvider { 031 032 /** 033 * Gets the register holding the current thread. 034 */ 035 Register getThreadRegister(); 036 037 /** 038 * Gets the register holding the heap base address for compressed pointers. 039 */ 040 Register getHeapBaseRegister(); 041 042 /** 043 * Gets the stack pointer register. 044 */ 045 Register getStackPointerRegister(); 046}