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 * 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
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package org.graalvm.compiler.hotspot.amd64;

import static jdk.vm.ci.amd64.AMD64.rax;
import static jdk.vm.ci.amd64.AMD64.rdx;
import static jdk.vm.ci.hotspot.HotSpotCallingConventionType.NativeCall;
import static jdk.vm.ci.meta.Value.ILLEGAL;
import static org.graalvm.compiler.core.common.LocationIdentity.any;
import static org.graalvm.compiler.hotspot.HotSpotBackend.EXCEPTION_HANDLER;
import static org.graalvm.compiler.hotspot.HotSpotBackend.EXCEPTION_HANDLER_IN_CALLER;
import static org.graalvm.compiler.hotspot.HotSpotForeignCallLinkage.JUMP_ADDRESS;
import static org.graalvm.compiler.hotspot.HotSpotForeignCallLinkage.RegisterEffect.PRESERVES_REGISTERS;
import static org.graalvm.compiler.hotspot.HotSpotForeignCallLinkage.Transition.LEAF;
import static org.graalvm.compiler.hotspot.HotSpotForeignCallLinkage.Transition.LEAF_NOFP;
import static org.graalvm.compiler.hotspot.replacements.CRC32Substitutions.UPDATE_BYTES_CRC32;

import org.graalvm.compiler.core.common.LIRKind;
import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor;
import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
import org.graalvm.compiler.hotspot.HotSpotForeignCallLinkageImpl;
import org.graalvm.compiler.hotspot.HotSpotGraalRuntimeProvider;
import org.graalvm.compiler.hotspot.meta.HotSpotHostForeignCallsProvider;
import org.graalvm.compiler.hotspot.meta.HotSpotProviders;
import org.graalvm.compiler.options.OptionValues;
import org.graalvm.compiler.word.WordTypes;

import jdk.vm.ci.code.CallingConvention;
import jdk.vm.ci.code.CodeCacheProvider;
import jdk.vm.ci.code.RegisterValue;
import jdk.vm.ci.code.TargetDescription;
import jdk.vm.ci.hotspot.HotSpotJVMCIRuntimeProvider;
import jdk.vm.ci.meta.MetaAccessProvider;
import jdk.vm.ci.meta.PlatformKind;
import jdk.vm.ci.meta.Value;

public class AMD64HotSpotForeignCallsProvider extends HotSpotHostForeignCallsProvider {

    public static final ForeignCallDescriptor ARITHMETIC_SIN_STUB = new ForeignCallDescriptor("arithmeticSinStub", double.class, double.class);
    public static final ForeignCallDescriptor ARITHMETIC_COS_STUB = new ForeignCallDescriptor("arithmeticCosStub", double.class, double.class);
    public static final ForeignCallDescriptor ARITHMETIC_TAN_STUB = new ForeignCallDescriptor("arithmeticTanStub", double.class, double.class);
    public static final ForeignCallDescriptor ARITHMETIC_EXP_STUB = new ForeignCallDescriptor("arithmeticExpStub", double.class, double.class);
    public static final ForeignCallDescriptor ARITHMETIC_POW_STUB = new ForeignCallDescriptor("arithmeticPowStub", double.class, double.class, double.class);
    public static final ForeignCallDescriptor ARITHMETIC_LOG_STUB = new ForeignCallDescriptor("arithmeticLogStub", double.class, double.class);
    public static final ForeignCallDescriptor ARITHMETIC_LOG10_STUB = new ForeignCallDescriptor("arithmeticLog10Stub", double.class, double.class);

    private final Value[] nativeABICallerSaveRegisters;

    public AMD64HotSpotForeignCallsProvider(HotSpotJVMCIRuntimeProvider jvmciRuntime, HotSpotGraalRuntimeProvider runtime, MetaAccessProvider metaAccess, CodeCacheProvider codeCache,
                    WordTypes wordTypes, Value[] nativeABICallerSaveRegisters) {
        super(jvmciRuntime, runtime, metaAccess, codeCache, wordTypes);
        this.nativeABICallerSaveRegisters = nativeABICallerSaveRegisters;
    }

    @Override
    public void initialize(HotSpotProviders providers, OptionValues options) {
        GraalHotSpotVMConfig config = runtime.getVMConfig();
        TargetDescription target = providers.getCodeCache().getTarget();
        PlatformKind word = target.arch.getWordKind();

        // The calling convention for the exception handler stub is (only?) defined in
        // TemplateInterpreterGenerator::generate_throw_exception()
        // in templateInterpreter_x86_64.cpp around line 1923
        RegisterValue exception = rax.asValue(LIRKind.reference(word));
        RegisterValue exceptionPc = rdx.asValue(LIRKind.value(word));
        CallingConvention exceptionCc = new CallingConvention(0, ILLEGAL, exception, exceptionPc);
        register(new HotSpotForeignCallLinkageImpl(EXCEPTION_HANDLER, 0L, PRESERVES_REGISTERS, LEAF_NOFP, exceptionCc, null, NOT_REEXECUTABLE, any()));
        register(new HotSpotForeignCallLinkageImpl(EXCEPTION_HANDLER_IN_CALLER, JUMP_ADDRESS, PRESERVES_REGISTERS, LEAF_NOFP, exceptionCc, null, NOT_REEXECUTABLE, any()));

        link(new AMD64MathStub(ARITHMETIC_LOG_STUB, options, providers, registerStubCall(ARITHMETIC_LOG_STUB, REEXECUTABLE, LEAF, NO_LOCATIONS)));
        link(new AMD64MathStub(ARITHMETIC_LOG10_STUB, options, providers, registerStubCall(ARITHMETIC_LOG10_STUB, REEXECUTABLE, LEAF, NO_LOCATIONS)));
        link(new AMD64MathStub(ARITHMETIC_SIN_STUB, options, providers, registerStubCall(ARITHMETIC_SIN_STUB, REEXECUTABLE, LEAF, NO_LOCATIONS)));
        link(new AMD64MathStub(ARITHMETIC_COS_STUB, options, providers, registerStubCall(ARITHMETIC_COS_STUB, REEXECUTABLE, LEAF, NO_LOCATIONS)));
        link(new AMD64MathStub(ARITHMETIC_TAN_STUB, options, providers, registerStubCall(ARITHMETIC_TAN_STUB, REEXECUTABLE, LEAF, NO_LOCATIONS)));
        link(new AMD64MathStub(ARITHMETIC_EXP_STUB, options, providers, registerStubCall(ARITHMETIC_EXP_STUB, REEXECUTABLE, LEAF, NO_LOCATIONS)));
        link(new AMD64MathStub(ARITHMETIC_POW_STUB, options, providers, registerStubCall(ARITHMETIC_POW_STUB, REEXECUTABLE, LEAF, NO_LOCATIONS)));

        if (config.useCRC32Intrinsics) {
            // This stub does callee saving
            registerForeignCall(UPDATE_BYTES_CRC32, config.updateBytesCRC32Stub, NativeCall, PRESERVES_REGISTERS, LEAF_NOFP, NOT_REEXECUTABLE, any());
        }

        super.initialize(providers, options);
    }

    @Override
    public Value[] getNativeABICallerSaveRegisters() {
        return nativeABICallerSaveRegisters;
    }

}