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view agent/src/share/classes/sun/jvm/hotspot/asm/sparc/FloatDecoder.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 FloatDecoder extends InstructionDecoder { final int opf; final String name; final int numSources; // 1 or 2; final int src1Type; // RTLDT_FL_SINGLE, _DOUBLE, _QUAD final int src2Type; // RTLDT_FL_SINGLE, _DOUBLE, _QUAD final int resultType; // RTLDT_FL_SINGLE, _DOUBLE, _QUAD FloatDecoder(int opf, String name, int src1Type, int src2Type, int resultType) { this.opf = opf; this.name = name; numSources = 2; this.src1Type = src1Type; this.src2Type = src2Type; this.resultType = resultType; } FloatDecoder(int opf, String name, int src2Type, int resultType) { this.opf = opf; this.name = name; numSources = 1; this.src1Type = RTLOP_UNKNOWN; this.src2Type = src2Type; this.resultType = resultType; } abstract Instruction decodeFloatInstruction(int instruction, SPARCRegister rs1, SPARCRegister rs2, SPARCRegister rd, SPARCInstructionFactory factory); Instruction decode(int instruction, SPARCInstructionFactory factory) { int rs1Num = getSourceRegister1(instruction); int rs2Num = getSourceRegister2(instruction); int rdNum = getDestinationRegister(instruction); SPARCRegister rs1 = null; if (numSources == 2) { rs1 = RegisterDecoder.decode(src1Type, rs1Num); if (rs1 == null) { return factory.newIllegalInstruction(instruction); } } SPARCRegister rd = RegisterDecoder.decode(resultType, rdNum); SPARCRegister rs2 = RegisterDecoder.decode(src2Type, rs2Num); if (rd == null || rs2 == null) { return factory.newIllegalInstruction(instruction); } return decodeFloatInstruction(instruction, rs1, rs2, rd, factory); } }