001/*
002 * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.lir.sparc;
024
025import jdk.internal.jvmci.code.*;
026import jdk.internal.jvmci.common.*;
027import jdk.internal.jvmci.meta.*;
028import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*;
029import static jdk.internal.jvmci.code.ValueUtil.*;
030
031import com.oracle.graal.asm.sparc.*;
032import com.oracle.graal.asm.sparc.SPARCAssembler.*;
033import com.oracle.graal.lir.*;
034import com.oracle.graal.lir.asm.*;
035import com.oracle.graal.lir.gen.*;
036
037@Opcode("BSWAP")
038public final class SPARCByteSwapOp extends SPARCLIRInstruction implements SPARCTailDelayedLIRInstruction {
039    public static final LIRInstructionClass<SPARCByteSwapOp> TYPE = LIRInstructionClass.create(SPARCByteSwapOp.class);
040    public static final SizeEstimate SIZE = SizeEstimate.create(3);
041    @Def({REG, HINT}) protected Value result;
042    @Use({REG}) protected Value input;
043    @Temp({REG}) protected Value tempIndex;
044    @Use({STACK, UNINITIALIZED}) protected StackSlotValue tmpSlot;
045
046    public SPARCByteSwapOp(LIRGeneratorTool tool, Value result, Value input) {
047        super(TYPE, SIZE);
048        this.result = result;
049        this.input = input;
050        this.tmpSlot = tool.getResult().getFrameMapBuilder().allocateSpillSlot(LIRKind.value(Kind.Long));
051        this.tempIndex = tool.newVariable(LIRKind.value(Kind.Long));
052    }
053
054    @Override
055    public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
056        SPARCAddress addr = (SPARCAddress) crb.asAddress(tmpSlot);
057        SPARCMove.emitStore(input, addr, result.getKind(), SPARCDelayedControlTransfer.DUMMY, null, crb, masm);
058        if (addr.getIndex().equals(Register.None)) {
059            Register tempReg = ValueUtil.asLongReg(tempIndex);
060            new SPARCMacroAssembler.Setx(addr.getDisplacement(), tempReg, false).emit(masm);
061            addr = new SPARCAddress(addr.getBase(), tempReg);
062        }
063        delayedControlTransfer.emitControlTransfer(crb, masm);
064        switch (input.getKind()) {
065            case Int:
066                masm.lduwa(addr.getBase(), addr.getIndex(), asIntReg(result), Asi.ASI_PRIMARY_LITTLE);
067                break;
068            case Long:
069                masm.ldxa(addr.getBase(), addr.getIndex(), asLongReg(result), Asi.ASI_PRIMARY_LITTLE);
070                break;
071            default:
072                throw JVMCIError.shouldNotReachHere();
073        }
074    }
075}