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 import sun.jvm.hotspot.utilities.Assert; 29 30 class V9FMOVccDecoder extends V9CMoveDecoder implements /* imports */ RTLDataTypes { 31 private final int opf; 32 private final int dataType; 33 34 V9FMOVccDecoder(int opf, int dataType) { 35 this.opf = opf; 36 this.dataType = dataType; 37 } 38 39 private static String getFMoveCCName(int conditionCode, int conditionFlag, int dataType) { 40 StringBuffer buf = new StringBuffer("fmov"); 41 buf.append(getFloatTypeCode(dataType)); 42 buf.append(getConditionName(conditionCode, conditionFlag)); 43 return buf.toString(); 44 } 45 46 private static int getFMoveConditionFlag(int instruction) { 47 return (instruction & OPF_CC_MASK) >>> OPF_CC_START_BIT; 48 } 49 50 Instruction decode(int instruction, SPARCInstructionFactory factory) { 51 SPARCV9InstructionFactory v9factory = (SPARCV9InstructionFactory) factory; 52 Instruction instr = null; 53 int conditionFlag = getFMoveConditionFlag(instruction); 54 if (conditionFlag == CFLAG_RESERVED1 || conditionFlag == CFLAG_RESERVED2) { 55 instr = v9factory.newIllegalInstruction(instruction); 56 } else { 57 int rdNum = getDestinationRegister(instruction); 58 int rs1Num = getSourceRegister1(instruction); 59 SPARCRegister rd = RegisterDecoder.decode(dataType, rdNum); 60 int conditionCode = getMoveConditionCode(instruction); 61 SPARCRegister rs = RegisterDecoder.decode(dataType, rs1Num); 62 String name = getFMoveCCName(conditionCode, conditionFlag, dataType); 63 instr = v9factory.newV9FMOVccInstruction(name,opf, conditionCode, conditionFlag, 64 (SPARCFloatRegister)rs, (SPARCFloatRegister)rd); 65 } 66 67 return instr; 68 } 69 }