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 class V9MOVccDecoder extends V9CMoveDecoder { 30 private static String getMoveCCName(int conditionCode, int conditionFlag) { 31 return "mov" + getConditionName(conditionCode, conditionFlag); 32 } 33 34 private static int getMoveConditionFlag(int instruction) { 35 boolean cc2Bit = (instruction & CMOVE_CC2_MASK) != 0; 36 int conditionFlag = (instruction & CMOVE_CC0_CC1_MASK) >>> CMOVE_CC_START_BIT; 37 if (cc2Bit) conditionFlag |= (0x4); // 100; 38 return conditionFlag; 39 } 40 41 Instruction decode(int instruction, SPARCInstructionFactory factory) { 42 SPARCV9InstructionFactory v9factory = (SPARCV9InstructionFactory) factory; 43 Instruction instr = null; 44 int conditionFlag = getMoveConditionFlag(instruction); 45 if (conditionFlag == CFLAG_RESERVED1 || conditionFlag == CFLAG_RESERVED2) { 46 instr = v9factory.newIllegalInstruction(instruction); 47 } else { 48 int rdNum = getDestinationRegister(instruction); 49 SPARCRegister rd = SPARCRegisters.getRegister(rdNum); 50 int conditionCode = getMoveConditionCode(instruction); 51 ImmediateOrRegister source = getCMoveSource(instruction, 11); 52 String name = getMoveCCName(conditionCode, conditionFlag); 53 instr = v9factory.newV9MOVccInstruction(name, conditionCode, conditionFlag, source, rd); 54 } 55 56 return instr; 57 } 58 }