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 class V9FMOVccDecoder extends V9CMoveDecoder implements /* imports */ RTLDataTypes {

    31     private final int opf;

    32     private final int dataType;

    33 

    34     V9FMOVccDecoder(int opf, int dataType) {

    35         this.opf = opf;

    36         this.dataType = dataType;

    37     }

    38 

    39     private static String getFMoveCCName(int conditionCode, int conditionFlag, int dataType) {

    40         StringBuffer buf = new StringBuffer("fmov");

    41         buf.append(getFloatTypeCode(dataType));

    42         buf.append(getConditionName(conditionCode, conditionFlag));

    43         return buf.toString();

    44     }

    45 

    46     private static int getFMoveConditionFlag(int instruction) {

    47         return (instruction & OPF_CC_MASK) >>> OPF_CC_START_BIT;

    48     }

    49 

    50     Instruction decode(int instruction, SPARCInstructionFactory factory) {

    51         SPARCV9InstructionFactory v9factory = (SPARCV9InstructionFactory) factory;

    52         Instruction instr = null;

    53         int conditionFlag = getFMoveConditionFlag(instruction);

    54         if (conditionFlag == CFLAG_RESERVED1 || conditionFlag == CFLAG_RESERVED2) {

    55             instr = v9factory.newIllegalInstruction(instruction);

    56         } else {

    57             int rdNum = getDestinationRegister(instruction);

    58             int rs1Num = getSourceRegister1(instruction);

    59             SPARCRegister rd = RegisterDecoder.decode(dataType, rdNum);

    60             int conditionCode = getMoveConditionCode(instruction);

    61             SPARCRegister rs = RegisterDecoder.decode(dataType, rs1Num);

    62             String name = getFMoveCCName(conditionCode, conditionFlag, dataType);

    63             instr = v9factory.newV9FMOVccInstruction(name,opf, conditionCode, conditionFlag,

    64                                (SPARCFloatRegister)rs, (SPARCFloatRegister)rd);

    65         }

    66 

    67         return instr;

    68     }

    69 }