1 /* 2 * Copyright 2002 Sun Microsystems, Inc. All Rights Reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25 package sun.jvm.hotspot.asm.sparc; 26 27 import sun.jvm.hotspot.asm.*; 28 29 public class SPARCLogicInstruction extends SPARCFormat3AInstruction 30 implements LogicInstruction { 31 final private int operation; 32 33 public SPARCLogicInstruction(String name, int opcode, int operation, SPARCRegister rs1, 34 ImmediateOrRegister operand2, SPARCRegister rd) { 35 super(name, opcode, rs1, operand2, rd); 36 this.operation = operation; 37 } 38 39 protected String getDescription() { 40 SPARCRegister G0 = SPARCRegisters.G0; 41 if (opcode == ORcc && rd == G0 && rd == operand2) { 42 StringBuffer buf = new StringBuffer(); 43 buf.append("tst"); 44 buf.append(spaces); 45 buf.append(getOperand2String()); 46 return buf.toString(); 47 } else if (opcode == XNOR && G0 == operand2) { 48 StringBuffer buf = new StringBuffer(); 49 buf.append("not"); 50 buf.append(spaces); 51 buf.append(rs1.toString()); 52 if (rs1 != rd) { 53 buf.append(comma); 54 buf.append(rd.toString()); 55 } 56 return buf.toString(); 57 } else if (opcode == ANDcc && rd == G0) { 58 StringBuffer buf = new StringBuffer(); 59 buf.append("btst"); 60 buf.append(spaces); 61 buf.append(getOperand2String()); 62 buf.append(comma); 63 buf.append(rd.toString()); 64 return buf.toString(); 65 } else if (rs1 == rd) { 66 StringBuffer buf = new StringBuffer(); 67 switch (opcode) { 68 case OR: 69 buf.append("bset"); 70 break; 71 case ANDN: 72 buf.append("bclr"); 73 break; 74 case XOR: 75 buf.append("btog"); 76 break; 77 default: 78 return super.getDescription(); 79 } 80 buf.append(spaces); 81 buf.append(getOperand2String()); 82 buf.append(comma); 83 buf.append(rd.toString()); 84 return buf.toString(); 85 } else { 86 return super.getDescription(); 87 } 88 } 89 90 public Operand getLogicDestination() { 91 return getDestinationRegister(); 92 } 93 94 public Operand[] getLogicSources() { 95 return (new Operand[] { rs1, operand2 }); 96 } 97 98 public int getOperation() { 99 return operation; 100 } 101 102 public boolean isLogic() { 103 return true; 104 } 105 }