/*

 * Copyright (c) 2012, 2018, 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package org.graalvm.compiler.lir.aarch64;

import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;

import org.graalvm.compiler.debug.GraalError;

import org.graalvm.compiler.lir.LIRInstructionClass;

import org.graalvm.compiler.lir.Opcode;

import org.graalvm.compiler.lir.asm.CompilationResultBuilder;

import jdk.vm.ci.aarch64.AArch64Kind;

import jdk.vm.ci.code.ValueUtil;

import jdk.vm.ci.meta.Value;

@Opcode("BSWAP")

public final class AArch64ByteSwapOp extends AArch64LIRInstruction {

    public static final LIRInstructionClass<AArch64ByteSwapOp> TYPE = LIRInstructionClass.create(AArch64ByteSwapOp.class);

    @Def({OperandFlag.REG, OperandFlag.HINT}) protected Value result;

    @Use protected Value input;

    public AArch64ByteSwapOp(Value result, Value input) {

        super(TYPE);

        this.result = result;

        this.input = input;

    }

    @Override

    public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {

        switch ((AArch64Kind) input.getPlatformKind()) {

            case DWORD:

                masm.rev(32, ValueUtil.asRegister(result), ValueUtil.asRegister(input));

                break;

            case QWORD:

                masm.rev(64, ValueUtil.asRegister(result), ValueUtil.asRegister(input));

                break;

            default:

                throw GraalError.shouldNotReachHere();

        }

    }

}