Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/asm/sparc/SPARCRegister.java @ 3945:8ed53447f690
Merge
author | iveresov |
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date | Thu, 15 Sep 2011 12:44:09 -0700 |
parents | c18cbe5936b8 |
children |
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/* * Copyright (c) 2000, 2002, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ package sun.jvm.hotspot.asm.sparc; import sun.jvm.hotspot.asm.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.utilities.*; public class SPARCRegister extends Register { private static final int nofRegisters = 32; // total number of registers private static final int GLOBAL_BASE = 0; private static final int OUT_BASE = 8; private static final int LOCAL_BASE = 16; private static final int IN_BASE = 24; private static final int LOCAL_SP_WORD_OFFSET = 0; private static final int IN_SP_WORD_OFFSET = 8; /** Constructor for an explicitly numbered register */ public SPARCRegister(int number) { super(number); } /** Constructor for an I, G, O, or L register */ public SPARCRegister(SPARCRegisterType type, int number) { if (type == SPARCRegisterType.GLOBAL) { this.number = number + GLOBAL_BASE; } else if (type == SPARCRegisterType.OUT) { this.number = number + OUT_BASE; } else if (type == SPARCRegisterType.LOCAL) { this.number = number + LOCAL_BASE; } else if (type == SPARCRegisterType.IN) { this.number = number + IN_BASE; } else { throw new IllegalArgumentException("Invalid SPARC register type"); } } public int getNumberOfRegisters() { return nofRegisters; } public boolean isIn() { return (IN_BASE <= getNumber()); } public boolean isLocal() { return (LOCAL_BASE <= getNumber() && getNumber() < IN_BASE); } public boolean isOut() { return (OUT_BASE <= getNumber() && getNumber() < LOCAL_BASE); } public boolean isGlobal() { return (GLOBAL_BASE <= getNumber() && getNumber() < OUT_BASE); } public SPARCRegister afterSave() { if (Assert.ASSERTS_ENABLED) { Assert.that(isOut() || isGlobal(), "register not visible after save"); } return isOut() ? new SPARCRegister(getNumber() + (IN_BASE - OUT_BASE)) : this; } public SPARCRegister afterRestore() { if (Assert.ASSERTS_ENABLED) { Assert.that(isIn() || isGlobal(), "register not visible after save"); } return isIn() ? new SPARCRegister(getNumber() + (OUT_BASE - IN_BASE)) : this; } /** NOTE: this returns an offset in BYTES in this system! */ public long spOffsetInSavedWindow() { if (isIn()) { return VM.getVM().getAddressSize() * (getNumber() - IN_BASE + IN_SP_WORD_OFFSET); } else if (isLocal()) { return VM.getVM().getAddressSize() * (getNumber() - LOCAL_BASE + LOCAL_SP_WORD_OFFSET); } if (Assert.ASSERTS_ENABLED) { Assert.that(isIn() || isLocal(), "only ins and locals are saved in my frame"); } return 0; } public String toString() { return SPARCRegisters.getRegisterName(number); } public boolean isFramePointer() { return number == 30; // is I6? } public boolean isStackPointer() { return number == 14; // is O6? } public boolean isFloat() { return false; } public boolean isV9Only() { return false; } }