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package org.graalvm.compiler.hotspot.aarch64;

import org.graalvm.compiler.core.aarch64.AArch64LoweringProviderMixin;
import org.graalvm.compiler.core.common.spi.ForeignCallsProvider;
import org.graalvm.compiler.core.common.spi.MetaAccessExtensionProvider;
import org.graalvm.compiler.debug.DebugHandlersFactory;
import org.graalvm.compiler.graph.Node;
import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
import org.graalvm.compiler.hotspot.HotSpotGraalRuntimeProvider;
import org.graalvm.compiler.hotspot.meta.DefaultHotSpotLoweringProvider;
import org.graalvm.compiler.hotspot.meta.HotSpotProviders;
import org.graalvm.compiler.hotspot.meta.HotSpotRegistersProvider;
import org.graalvm.compiler.nodes.calc.FloatConvertNode;
import org.graalvm.compiler.nodes.calc.IntegerDivRemNode;
import org.graalvm.compiler.nodes.calc.RemNode;
import org.graalvm.compiler.nodes.memory.VolatileReadNode;
import org.graalvm.compiler.nodes.memory.VolatileWriteNode;
import org.graalvm.compiler.nodes.spi.LoweringTool;
import org.graalvm.compiler.nodes.spi.PlatformConfigurationProvider;
import org.graalvm.compiler.options.OptionValues;
import org.graalvm.compiler.replacements.aarch64.AArch64FloatArithmeticSnippets;
import org.graalvm.compiler.replacements.aarch64.AArch64IntegerArithmeticSnippets;

import jdk.vm.ci.code.TargetDescription;
import jdk.vm.ci.hotspot.HotSpotConstantReflectionProvider;
import jdk.vm.ci.meta.MetaAccessProvider;

public class AArch64HotSpotLoweringProvider extends DefaultHotSpotLoweringProvider implements AArch64LoweringProviderMixin {

    private AArch64IntegerArithmeticSnippets integerArithmeticSnippets;
    private AArch64FloatArithmeticSnippets floatArithmeticSnippets;

    public AArch64HotSpotLoweringProvider(HotSpotGraalRuntimeProvider runtime, MetaAccessProvider metaAccess, ForeignCallsProvider foreignCalls, HotSpotRegistersProvider registers,
                    HotSpotConstantReflectionProvider constantReflection, PlatformConfigurationProvider platformConfig, MetaAccessExtensionProvider metaAccessExtensionProvider,
                    TargetDescription target) {
        super(runtime, metaAccess, foreignCalls, registers, constantReflection, platformConfig, metaAccessExtensionProvider, target);
    }

    @Override
    public void initialize(OptionValues options, Iterable<DebugHandlersFactory> factories, HotSpotProviders providers, GraalHotSpotVMConfig config) {
        integerArithmeticSnippets = new AArch64IntegerArithmeticSnippets(options, factories, providers, providers.getSnippetReflection(), providers.getCodeCache().getTarget());
        floatArithmeticSnippets = new AArch64FloatArithmeticSnippets(options, factories, providers, providers.getSnippetReflection(), providers.getCodeCache().getTarget());
        super.initialize(options, factories, providers, config);
    }

    @Override
    public void lower(Node n, LoweringTool tool) {
        if (n instanceof IntegerDivRemNode) {
            integerArithmeticSnippets.lower((IntegerDivRemNode) n, tool);
        } else if (n instanceof RemNode) {
            floatArithmeticSnippets.lower((RemNode) n, tool);
        } else if (n instanceof FloatConvertNode) {
            // AMD64 has custom lowerings for ConvertNodes, HotSpotLoweringProvider does not expect
            // to see a ConvertNode and throws an error, just do nothing here.
        } else if (n instanceof VolatileReadNode || n instanceof VolatileWriteNode) {
            // AArch64 emits its own code sequence for volatile accesses. We don't want it lowered
            // to memory barriers + a regular access.
        } else {
            super.lower(n, tool);
        }
    }
}