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 
  29 class V9MOVrDecoder extends V9CMoveDecoder {
  30     private static final String regConditionNames[] = {
  31         null, "movrz", "movrlez", "movrlz", null, "movrnz", "movrgz", "movrgez"
  32     };
  33 
  34     private static String getMOVrName(int conditionCode) {
  35         return regConditionNames[conditionCode];
  36     }
  37 
  38     Instruction decode(int instruction, SPARCInstructionFactory factory) {
  39         SPARCV9InstructionFactory v9factory = (SPARCV9InstructionFactory) factory;
  40         Instruction instr = null;
  41         int regConditionCode = getRegisterConditionCode(instruction);
  42         String name = getMOVrName(regConditionCode);
  43         if (name == null) {
  44             instr = v9factory.newIllegalInstruction(instruction);
  45         } else {
  46             int rdNum = getDestinationRegister(instruction);
  47             SPARCRegister rd = SPARCRegisters.getRegister(rdNum);
  48             SPARCRegister rs1 = SPARCRegisters.getRegister(getSourceRegister1(instruction));
  49             ImmediateOrRegister operand2 = getCMoveSource(instruction, 10);
  50             instr = v9factory.newV9MOVrInstruction(name, rs1, operand2, rd, regConditionCode);
  51         }
  52 
  53         return instr;
  54     }
  55 }