Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/asm/sparc/V9MOVccDecoder.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/asm/sparc/V9MOVccDecoder.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,58 @@ +/* + * 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; + } +}