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view agent/src/share/classes/sun/jvm/hotspot/asm/sparc/V9MOVccDecoder.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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/* * Copyright 2002 Sun Microsystems, Inc. All Rights Reserved. * 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. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ package sun.jvm.hotspot.asm.sparc; import sun.jvm.hotspot.asm.*; class V9MOVccDecoder extends V9CMoveDecoder { private static String getMoveCCName(int conditionCode, int conditionFlag) { return "mov" + getConditionName(conditionCode, conditionFlag); } private static int getMoveConditionFlag(int instruction) { boolean cc2Bit = (instruction & CMOVE_CC2_MASK) != 0; int conditionFlag = (instruction & CMOVE_CC0_CC1_MASK) >>> CMOVE_CC_START_BIT; if (cc2Bit) conditionFlag |= (0x4); // 100; return conditionFlag; } Instruction decode(int instruction, SPARCInstructionFactory factory) { SPARCV9InstructionFactory v9factory = (SPARCV9InstructionFactory) factory; Instruction instr = null; int conditionFlag = getMoveConditionFlag(instruction); if (conditionFlag == CFLAG_RESERVED1 || conditionFlag == CFLAG_RESERVED2) { instr = v9factory.newIllegalInstruction(instruction); } else { int rdNum = getDestinationRegister(instruction); SPARCRegister rd = SPARCRegisters.getRegister(rdNum); int conditionCode = getMoveConditionCode(instruction); ImmediateOrRegister source = getCMoveSource(instruction, 11); String name = getMoveCCName(conditionCode, conditionFlag); instr = v9factory.newV9MOVccInstruction(name, conditionCode, conditionFlag, source, rd); } return instr; } }