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 * Copyright (c) 2019, 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 org.graalvm.compiler.hotspot.replacements;

import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfig.INJECTED_METAACCESS;

import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfigBase.INJECTED_INTRINSIC_CONTEXT;

import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfigBase.INJECTED_VMCONFIG;

import static org.graalvm.compiler.nodes.java.InstanceOfNode.doInstanceof;

import org.graalvm.compiler.api.replacements.ClassSubstitution;

import org.graalvm.compiler.api.replacements.Fold;

import org.graalvm.compiler.api.replacements.MethodSubstitution;

import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;

import org.graalvm.compiler.hotspot.HotSpotBackend;

import org.graalvm.compiler.nodes.ComputeObjectAddressNode;

import org.graalvm.compiler.nodes.PiNode;

import org.graalvm.compiler.nodes.extended.RawLoadNode;

import org.graalvm.compiler.replacements.ReplacementsUtil;

import org.graalvm.compiler.word.Word;

import jdk.internal.vm.compiler.word.LocationIdentity;

import jdk.internal.vm.compiler.word.WordFactory;

import jdk.vm.ci.meta.JavaKind;

import jdk.vm.ci.meta.ResolvedJavaType;

@ClassSubstitution(className = "sun.security.provider.DigestBase", optional = true)

public class DigestBaseSubstitutions {

    @MethodSubstitution(isStatic = false)

    static int implCompressMultiBlock0(Object receiver, byte[] buf, int ofs, int limit) {

        Object realReceiver = PiNode.piCastNonNull(receiver, HotSpotReplacementsUtil.methodHolderClass(INJECTED_INTRINSIC_CONTEXT));

        ResolvedJavaType sha1type = HotSpotReplacementsUtil.getType(INJECTED_INTRINSIC_CONTEXT, "Lsun/security/provider/SHA;");

        ResolvedJavaType sha256type = HotSpotReplacementsUtil.getType(INJECTED_INTRINSIC_CONTEXT, "Lsun/security/provider/SHA2;");

        ResolvedJavaType sha512type = HotSpotReplacementsUtil.getType(INJECTED_INTRINSIC_CONTEXT, "Lsun/security/provider/SHA5;");

        Word bufAddr = WordFactory.unsigned(ComputeObjectAddressNode.get(buf, ReplacementsUtil.getArrayBaseOffset(INJECTED_METAACCESS, JavaKind.Byte) + ofs));

        if (useSHA1Intrinsics(INJECTED_VMCONFIG) && doInstanceof(sha1type, realReceiver)) {

            Object sha1obj = PiNode.piCastNonNull(realReceiver, sha1type);

            Object state = RawLoadNode.load(sha1obj, HotSpotReplacementsUtil.getFieldOffset(sha1type, "state"), JavaKind.Object, LocationIdentity.any());

            Word stateAddr = WordFactory.unsigned(ComputeObjectAddressNode.get(state, ReplacementsUtil.getArrayBaseOffset(INJECTED_METAACCESS, JavaKind.Int)));

            return HotSpotBackend.shaImplCompressMBStub(bufAddr, stateAddr, ofs, limit);

        } else if (useSHA256Intrinsics(INJECTED_VMCONFIG) && doInstanceof(sha256type, realReceiver)) {

            Object sha256obj = PiNode.piCastNonNull(realReceiver, sha256type);

            Object state = RawLoadNode.load(sha256obj, HotSpotReplacementsUtil.getFieldOffset(sha256type, "state"), JavaKind.Object, LocationIdentity.any());

            Word stateAddr = WordFactory.unsigned(ComputeObjectAddressNode.get(state, ReplacementsUtil.getArrayBaseOffset(INJECTED_METAACCESS, JavaKind.Int)));

            return HotSpotBackend.sha2ImplCompressMBStub(bufAddr, stateAddr, ofs, limit);

        } else if (useSHA512Intrinsics(INJECTED_VMCONFIG) && doInstanceof(sha512type, realReceiver)) {

            Object sha512obj = PiNode.piCastNonNull(realReceiver, sha512type);

            Object state = RawLoadNode.load(sha512obj, HotSpotReplacementsUtil.getFieldOffset(sha512type, "state"), JavaKind.Object, LocationIdentity.any());

            Word stateAddr = WordFactory.unsigned(ComputeObjectAddressNode.get(state, ReplacementsUtil.getArrayBaseOffset(INJECTED_METAACCESS, JavaKind.Int)));

            return HotSpotBackend.sha5ImplCompressMBStub(bufAddr, stateAddr, ofs, limit);

        } else {

            return implCompressMultiBlock0(realReceiver, buf, ofs, limit);

        }

    }

    @Fold

    public static boolean useSHA1Intrinsics(@Fold.InjectedParameter GraalHotSpotVMConfig config) {

        return config.useSHA1Intrinsics();

    }

    @Fold

    public static boolean useSHA256Intrinsics(@Fold.InjectedParameter GraalHotSpotVMConfig config) {

        return config.useSHA256Intrinsics();

    }

    @Fold

    public static boolean useSHA512Intrinsics(@Fold.InjectedParameter GraalHotSpotVMConfig config) {

        return config.useSHA512Intrinsics();

    }

}