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/*
 * Copyright (c) 2023, 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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,
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package jdk.graal.compiler.lir.aarch64;

import static jdk.vm.ci.code.ValueUtil.asRegister;
import static jdk.graal.compiler.asm.aarch64.AArch64ASIMDAssembler.ElementSize.HalfWord;
import static jdk.graal.compiler.lir.LIRInstruction.OperandFlag.REG;

import jdk.graal.compiler.asm.aarch64.AArch64MacroAssembler;
import jdk.graal.compiler.lir.asm.CompilationResultBuilder;
import jdk.graal.compiler.lir.LIRInstructionClass;
import jdk.graal.compiler.lir.SyncPort;
import jdk.graal.compiler.lir.gen.LIRGeneratorTool;

import jdk.vm.ci.code.Register;
import jdk.vm.ci.meta.Value;

// @formatter:off
@SyncPort(from = "https://github.com/openjdk/jdk/blob/aaaa86b57172d45d1126c50efc270c6e49aba7a5/src/hotspot/cpu/aarch64/macroAssembler_aarch64.hpp#L533-L536",
          sha1 = "f723de35aeda75e448037a23cd6af82f457c24cf")
// @formatter:on
public class AArch64HalfFloatToFloatOp extends AArch64LIRInstruction {
    public static final LIRInstructionClass TYPE = LIRInstructionClass.create(AArch64HalfFloatToFloatOp.class);

    @Def({REG}) protected Value dstValue;
    @Alive({REG}) protected Value srcValue;

    @Temp({REG}) protected Value tmpValue;

    public AArch64HalfFloatToFloatOp(LIRGeneratorTool tool, Value dstValue, Value srcValue) {
        super(TYPE);
        this.dstValue = dstValue;
        this.srcValue = srcValue;

        this.tmpValue = tool.newVariable(dstValue.getValueKind());
    }

    @Override
    public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
        Register dst = asRegister(dstValue);
        Register src = asRegister(srcValue);
        Register tmp = asRegister(tmpValue);

        masm.neon.insXG(HalfWord, tmp, 0, src);
        masm.fcvt(32, 16, dst, tmp);
    }
}