Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/asm/sparc/MemoryInstructionDecoder.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/MemoryInstructionDecoder.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,86 @@ +/* + * 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.*; + +abstract class MemoryInstructionDecoder extends InstructionDecoder { + final int op3; + final String name; + final int dataType; + + SPARCRegisterIndirectAddress newRegisterIndirectAddress(SPARCRegister rs1, SPARCRegister rs2) { + return new SPARCRegisterIndirectAddress(rs1, rs2); + } + + SPARCRegisterIndirectAddress newRegisterIndirectAddress(SPARCRegister rs1, int offset) { + return new SPARCRegisterIndirectAddress(rs1, offset); + } + + static void setAddressSpace(int instruction, SPARCRegisterIndirectAddress addr) { + int asi = (instruction & ASI_MASK) >>> ASI_START_BIT; + addr.setAddressSpace(asi); + } + + SPARCRegisterIndirectAddress getRegisterIndirectAddress(int instruction) { + SPARCRegister rs1 = SPARCRegisters.getRegister(getSourceRegister1(instruction)); + boolean iBit = isIBitSet(instruction); + SPARCRegisterIndirectAddress addr = null; + if (iBit) { + int simm13 = extractSignedIntFromNBits(instruction, 13); + addr = newRegisterIndirectAddress(rs1,simm13); + } else { + SPARCRegister rs2 = SPARCRegisters.getRegister(getSourceRegister2(instruction)); + addr = newRegisterIndirectAddress(rs1,rs2); + } + return addr; + } + + MemoryInstructionDecoder(int op3, String name, int dataType) { + this.op3 = op3; + this.name = name; + this.dataType = dataType; + } + + Instruction decode(int instruction, SPARCInstructionFactory factory) { + SPARCRegisterIndirectAddress addr = getRegisterIndirectAddress(instruction); + SPARCRegister rd = getDestination(instruction); + boolean isV9Okay = (factory instanceof SPARCV9InstructionFactory); + if ( (rd == null) || (! isV9Okay && rd.isV9Only()) ) + return factory.newIllegalInstruction(instruction); + + return decodeMemoryInstruction(instruction, addr, rd, factory); + } + + SPARCRegister getDestination(int instruction) { + int rdNum = getDestinationRegister(instruction); + SPARCRegister rd = RegisterDecoder.decode(dataType, rdNum); + return rd; + } + + abstract Instruction decodeMemoryInstruction(int instruction, + SPARCRegisterIndirectAddress addr, + SPARCRegister rd, SPARCInstructionFactory factory); +}