| /* |
| * 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; |
| } |
| } |