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1 /*
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2 * Copyright 2002 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.asm.sparc;
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26
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27 import sun.jvm.hotspot.asm.*;
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28 import sun.jvm.hotspot.utilities.Assert;
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29
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30 abstract class V9CMoveDecoder extends InstructionDecoder
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31 implements V9InstructionDecoder {
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32 static private final String iccConditionNames[] = {
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33 "n", "e", "le", "l", "leu", "cs", "neg", "vs",
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34 "a", "ne", "g", "ge", "gu", "cc", "pos", "vc"
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35 };
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36
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37 static private final String fccConditionNames[] = {
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38 "fn", "fne", "flg", "ful", "fl", "fug", "fg", "fu",
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39 "fa", "fe", "fue", "fge", "fuge", "fle", "fule", "fo"
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40 };
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41
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42 static String getConditionName(int conditionCode, int conditionFlag) {
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43 return (conditionFlag == icc || conditionFlag == xcc) ?
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44 iccConditionNames[conditionCode]
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45 : fccConditionNames[conditionCode];
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46 }
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47
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48 static int getMoveConditionCode(int instruction) {
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49 return (instruction & CMOVE_COND_MASK) >>> CMOVE_COND_START_BIT;
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50 }
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51
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52 static int getRegisterConditionCode(int instruction) {
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53 return (instruction & CMOVE_RCOND_MASK) >>> CMOVE_RCOND_START_BIT;
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54 }
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55
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56 static ImmediateOrRegister getCMoveSource(int instruction, int numBits) {
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57 ImmediateOrRegister source = null;
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58 if (isIBitSet(instruction)) {
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59 source = new Immediate(new Short((short) extractSignedIntFromNBits(instruction, numBits)));
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60 } else {
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61 source = SPARCRegisters.getRegister(getSourceRegister2(instruction));
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62 }
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63 return source;
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64 }
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65
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66 static String getFloatTypeCode(int dataType) {
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67 String result = null;
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68 switch(dataType) {
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69 case RTLDT_FL_SINGLE:
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70 result = "s";
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71 break;
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72
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73 case RTLDT_FL_DOUBLE:
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74 result = "d";
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75 break;
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76
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77 case RTLDT_FL_QUAD:
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78 result = "q";
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79 break;
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80
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81 default:
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82 if (Assert.ASSERTS_ENABLED)
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83 Assert.that(false, "should not reach here");
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84 }
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85 return result;
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86 }
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87 }
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