001/*
002 * Copyright (c) 2012, 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.amd64;
024
025import jdk.internal.jvmci.code.*;
026import jdk.internal.jvmci.meta.*;
027
028import com.oracle.graal.asm.amd64.*;
029import com.oracle.graal.lir.*;
030import com.oracle.graal.lir.asm.*;
031
032@Opcode("BSWAP")
033public final class AMD64ByteSwapOp extends AMD64LIRInstruction {
034    public static final LIRInstructionClass<AMD64ByteSwapOp> TYPE = LIRInstructionClass.create(AMD64ByteSwapOp.class);
035
036    @Def({OperandFlag.REG, OperandFlag.HINT}) protected Value result;
037    @Use protected Value input;
038
039    public AMD64ByteSwapOp(Value result, Value input) {
040        super(TYPE);
041        this.result = result;
042        this.input = input;
043    }
044
045    @Override
046    public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
047        AMD64Move.move(crb, masm, result, input);
048        switch (input.getKind()) {
049            case Int:
050                masm.bswapl(ValueUtil.asIntReg(result));
051                break;
052            case Long:
053                masm.bswapq(ValueUtil.asLongReg(result));
054        }
055    }
056}