1/*
2 * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package org.graalvm.compiler.lir.aarch64;
24
25import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
26import org.graalvm.compiler.debug.GraalError;
27import org.graalvm.compiler.lir.LIRInstructionClass;
28import org.graalvm.compiler.lir.Opcode;
29import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
30
31import jdk.vm.ci.aarch64.AArch64Kind;
32import jdk.vm.ci.code.ValueUtil;
33import jdk.vm.ci.meta.Value;
34
35@Opcode("BSWAP")
36public final class AArch64ByteSwapOp extends AArch64LIRInstruction {
37    public static final LIRInstructionClass<AArch64ByteSwapOp> TYPE = LIRInstructionClass.create(AArch64ByteSwapOp.class);
38
39    @Def({OperandFlag.REG, OperandFlag.HINT}) protected Value result;
40    @Use protected Value input;
41
42    public AArch64ByteSwapOp(Value result, Value input) {
43        super(TYPE);
44        this.result = result;
45        this.input = input;
46    }
47
48    @Override
49    public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
50        switch ((AArch64Kind) input.getPlatformKind()) {
51            case DWORD:
52                masm.rev(32, ValueUtil.asRegister(result), ValueUtil.asRegister(input));
53                break;
54            case QWORD:
55                masm.rev(64, ValueUtil.asRegister(result), ValueUtil.asRegister(input));
56                break;
57            default:
58                throw GraalError.shouldNotReachHere();
59        }
60    }
61}
62