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view agent/src/share/classes/sun/jvm/hotspot/asm/sparc/SPARCLogicInstruction.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.*; public class SPARCLogicInstruction extends SPARCFormat3AInstruction implements LogicInstruction { final private int operation; public SPARCLogicInstruction(String name, int opcode, int operation, SPARCRegister rs1, ImmediateOrRegister operand2, SPARCRegister rd) { super(name, opcode, rs1, operand2, rd); this.operation = operation; } protected String getDescription() { SPARCRegister G0 = SPARCRegisters.G0; if (opcode == ORcc && rd == G0 && rd == operand2) { StringBuffer buf = new StringBuffer(); buf.append("tst"); buf.append(spaces); buf.append(getOperand2String()); return buf.toString(); } else if (opcode == XNOR && G0 == operand2) { StringBuffer buf = new StringBuffer(); buf.append("not"); buf.append(spaces); buf.append(rs1.toString()); if (rs1 != rd) { buf.append(comma); buf.append(rd.toString()); } return buf.toString(); } else if (opcode == ANDcc && rd == G0) { StringBuffer buf = new StringBuffer(); buf.append("btst"); buf.append(spaces); buf.append(getOperand2String()); buf.append(comma); buf.append(rd.toString()); return buf.toString(); } else if (rs1 == rd) { StringBuffer buf = new StringBuffer(); switch (opcode) { case OR: buf.append("bset"); break; case ANDN: buf.append("bclr"); break; case XOR: buf.append("btog"); break; default: return super.getDescription(); } buf.append(spaces); buf.append(getOperand2String()); buf.append(comma); buf.append(rd.toString()); return buf.toString(); } else { return super.getDescription(); } } public Operand getLogicDestination() { return getDestinationRegister(); } public Operand[] getLogicSources() { return (new Operand[] { rs1, operand2 }); } public int getOperation() { return operation; } public boolean isLogic() { return true; } }