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 }