/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 *

 */

package sun.jvm.hotspot.asm.sparc;

import sun.jvm.hotspot.asm.*;

class V9SavedRestoredDecoder extends InstructionDecoder

              implements V9InstructionDecoder {

    Instruction decode(int instruction, SPARCInstructionFactory factory) {

        SPARCV9InstructionFactory v9factory = (SPARCV9InstructionFactory) factory;

        Instruction instr = null;

        int rdNum = getDestinationRegister(instruction);

        // "rd" field is "fcn". Only values 0 and 1 are defined.

        // see page 219 - A.47 Saved and Restored

        switch (rdNum) {

            case 0:

                instr = v9factory.newV9SavedInstruction();

                break;

            case 1:

                instr = v9factory.newV9RestoredInstruction();

                break;

            default:

                instr = v9factory.newIllegalInstruction(instruction);

                break;

        }

        return instr;

    }

}