Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/asm/sparc/V9WriteDecoder.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/V9WriteDecoder.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,61 @@ +/* + * 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 V9WriteDecoder extends InstructionDecoder + implements V9InstructionDecoder { + Instruction decode(int instruction, SPARCInstructionFactory factory) { + SPARCV9InstructionFactory v9factory = (SPARCV9InstructionFactory) factory; + Instruction instr = null; + int specialRegNum = getDestinationRegister(instruction); + + // rd values 1, 4,5 7-14 are reserved - see page 244, A.63 Write State Register. + if (specialRegNum == 1 || specialRegNum == 4 || specialRegNum == 5 + || (specialRegNum > 6 && specialRegNum < 15)) { + instr = v9factory.newIllegalInstruction(instruction); + } else { + int rs1Num = getSourceRegister1(instruction); + if (specialRegNum == 15) { + if (isIBitSet(instruction) && rs1Num == 0) { + instr = v9factory.newV9SirInstruction(); + } else { + instr = v9factory.newIllegalInstruction(instruction); + } + } else { + int asrRegNum = -1; + if (specialRegNum > 15) { + asrRegNum = specialRegNum; + specialRegNum = SPARCV9SpecialRegisters.ASR; + } + SPARCRegister rs1 = SPARCRegisters.getRegister(rs1Num); + instr = v9factory.newV9WriteInstruction(specialRegNum, asrRegNum, rs1, getOperand2(instruction)); + } + } + + return instr; + } +}