1 /*

     2  * Copyright (c) 2002, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * 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 }