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 abstract class V9CMoveDecoder extends InstructionDecoder 31 implements V9InstructionDecoder { 32 static private final String iccConditionNames[] = { 33 "n", "e", "le", "l", "leu", "cs", "neg", "vs", 34 "a", "ne", "g", "ge", "gu", "cc", "pos", "vc" 35 }; 36 37 static private final String fccConditionNames[] = { 38 "fn", "fne", "flg", "ful", "fl", "fug", "fg", "fu", 39 "fa", "fe", "fue", "fge", "fuge", "fle", "fule", "fo" 40 }; 41 42 static String getConditionName(int conditionCode, int conditionFlag) { 43 return (conditionFlag == icc || conditionFlag == xcc) ? 44 iccConditionNames[conditionCode] 45 : fccConditionNames[conditionCode]; 46 } 47 48 static int getMoveConditionCode(int instruction) { 49 return (instruction & CMOVE_COND_MASK) >>> CMOVE_COND_START_BIT; 50 } 51 52 static int getRegisterConditionCode(int instruction) { 53 return (instruction & CMOVE_RCOND_MASK) >>> CMOVE_RCOND_START_BIT; 54 } 55 56 static ImmediateOrRegister getCMoveSource(int instruction, int numBits) { 57 ImmediateOrRegister source = null; 58 if (isIBitSet(instruction)) { 59 source = new Immediate(new Short((short) extractSignedIntFromNBits(instruction, numBits))); 60 } else { 61 source = SPARCRegisters.getRegister(getSourceRegister2(instruction)); 62 } 63 return source; 64 } 65 66 static String getFloatTypeCode(int dataType) { 67 String result = null; 68 switch(dataType) { 69 case RTLDT_FL_SINGLE: 70 result = "s"; 71 break; 72 73 case RTLDT_FL_DOUBLE: 74 result = "d"; 75 break; 76 77 case RTLDT_FL_QUAD: 78 result = "q"; 79 break; 80 81 default: 82 if (Assert.ASSERTS_ENABLED) 83 Assert.that(false, "should not reach here"); 84 } 85 return result; 86 } 87 }