/*
 * Copyright (c) 2012, 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.oracle.graal.snippets.target.amd64;

import com.oracle.graal.api.code.*;
import com.oracle.graal.api.meta.*;
import com.oracle.graal.lir.LIRInstruction.*;
import com.oracle.graal.lir.amd64.*;
import com.oracle.graal.lir.asm.*;
import com.oracle.max.asm.target.amd64.*;

@Opcode("BSWAP")
public class AMD64ByteSwapOp extends AMD64LIRInstruction {
    @Def({OperandFlag.REG, OperandFlag.HINT}) protected Value result;
    @Use protected Value input;

    public AMD64ByteSwapOp(Value result, Value input) {
        this.result = result;
        this.input = input;
    }

    @Override
    public void emitCode(TargetMethodAssembler tasm, AMD64MacroAssembler masm) {
        AMD64Move.move(tasm, masm, result, input);
        switch(input.getKind()) {
            case Int:
                masm.bswapl(ValueUtil.asIntReg(result));
                break;
            case Long:
                masm.bswapq(ValueUtil.asLongReg(result));
        }
    }
}