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view agent/src/share/classes/sun/jvm/hotspot/asm/sparc/MemoryInstructionDecoder.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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/* * Copyright 2002 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ package sun.jvm.hotspot.asm.sparc; import sun.jvm.hotspot.asm.*; abstract class MemoryInstructionDecoder extends InstructionDecoder { final int op3; final String name; final int dataType; SPARCRegisterIndirectAddress newRegisterIndirectAddress(SPARCRegister rs1, SPARCRegister rs2) { return new SPARCRegisterIndirectAddress(rs1, rs2); } SPARCRegisterIndirectAddress newRegisterIndirectAddress(SPARCRegister rs1, int offset) { return new SPARCRegisterIndirectAddress(rs1, offset); } static void setAddressSpace(int instruction, SPARCRegisterIndirectAddress addr) { int asi = (instruction & ASI_MASK) >>> ASI_START_BIT; addr.setAddressSpace(asi); } SPARCRegisterIndirectAddress getRegisterIndirectAddress(int instruction) { SPARCRegister rs1 = SPARCRegisters.getRegister(getSourceRegister1(instruction)); boolean iBit = isIBitSet(instruction); SPARCRegisterIndirectAddress addr = null; if (iBit) { int simm13 = extractSignedIntFromNBits(instruction, 13); addr = newRegisterIndirectAddress(rs1,simm13); } else { SPARCRegister rs2 = SPARCRegisters.getRegister(getSourceRegister2(instruction)); addr = newRegisterIndirectAddress(rs1,rs2); } return addr; } MemoryInstructionDecoder(int op3, String name, int dataType) { this.op3 = op3; this.name = name; this.dataType = dataType; } Instruction decode(int instruction, SPARCInstructionFactory factory) { SPARCRegisterIndirectAddress addr = getRegisterIndirectAddress(instruction); SPARCRegister rd = getDestination(instruction); boolean isV9Okay = (factory instanceof SPARCV9InstructionFactory); if ( (rd == null) || (! isV9Okay && rd.isV9Only()) ) return factory.newIllegalInstruction(instruction); return decodeMemoryInstruction(instruction, addr, rd, factory); } SPARCRegister getDestination(int instruction) { int rdNum = getDestinationRegister(instruction); SPARCRegister rd = RegisterDecoder.decode(dataType, rdNum); return rd; } abstract Instruction decodeMemoryInstruction(int instruction, SPARCRegisterIndirectAddress addr, SPARCRegister rd, SPARCInstructionFactory factory); }