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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * 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.

 *

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package org.graalvm.compiler.hotspot.amd64;

import static org.graalvm.compiler.core.common.GraalOptions.GeneratePIC;

import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.HINT;

import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;

import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.STACK;

import static jdk.vm.ci.code.ValueUtil.asRegister;

import static jdk.vm.ci.code.ValueUtil.isRegister;

import static jdk.vm.ci.code.ValueUtil.isStackSlot;

import org.graalvm.compiler.asm.amd64.AMD64Address;

import org.graalvm.compiler.core.common.CompressEncoding;

import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;

import org.graalvm.compiler.debug.GraalError;

import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;

import org.graalvm.compiler.lir.LIRInstructionClass;

import org.graalvm.compiler.lir.StandardOp.LoadConstantOp;

import org.graalvm.compiler.lir.amd64.AMD64LIRInstruction;

import org.graalvm.compiler.lir.asm.CompilationResultBuilder;

import jdk.vm.ci.code.Register;

import jdk.vm.ci.hotspot.HotSpotMetaspaceConstant;

import jdk.vm.ci.hotspot.HotSpotObjectConstant;

import jdk.vm.ci.meta.AllocatableValue;

import jdk.vm.ci.meta.Constant;

public class AMD64HotSpotMove {

    public static final class HotSpotLoadObjectConstantOp extends AMD64LIRInstruction implements LoadConstantOp {

        public static final LIRInstructionClass<HotSpotLoadObjectConstantOp> TYPE = LIRInstructionClass.create(HotSpotLoadObjectConstantOp.class);

        @Def({REG, STACK}) private AllocatableValue result;

        private final HotSpotObjectConstant input;

        public HotSpotLoadObjectConstantOp(AllocatableValue result, HotSpotObjectConstant input) {

            super(TYPE);

            this.result = result;

            this.input = input;

        }

        @Override

        public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {

            if (GeneratePIC.getValue(crb.getOptions())) {

                throw GraalError.shouldNotReachHere("Object constant load should not be happening directly");

            }

            boolean compressed = input.isCompressed();

            if (crb.target.inlineObjects) {

                crb.recordInlineDataInCode(input);

                if (isRegister(result)) {

                    if (compressed) {

                        masm.movl(asRegister(result), 0xDEADDEAD);

                    } else {

                        masm.movq(asRegister(result), 0xDEADDEADDEADDEADL);

                    }

                } else {

                    assert isStackSlot(result);

                    if (compressed) {

                        masm.movl((AMD64Address) crb.asAddress(result), 0xDEADDEAD);

                    } else {

                        throw GraalError.shouldNotReachHere("Cannot store 64-bit constants to memory");

                    }

                }

            } else {

                if (isRegister(result)) {

                    AMD64Address address = (AMD64Address) crb.recordDataReferenceInCode(input, compressed ? 4 : 8);

                    if (compressed) {

                        masm.movl(asRegister(result), address);

                    } else {

                        masm.movq(asRegister(result), address);

                    }

                } else {

                    throw GraalError.shouldNotReachHere("Cannot directly store data patch to memory");

                }

            }

        }

        @Override

        public Constant getConstant() {

            return input;

        }

        @Override

        public AllocatableValue getResult() {

            return result;

        }

    }

    public static final class BaseMove extends AMD64LIRInstruction {

        public static final LIRInstructionClass<BaseMove> TYPE = LIRInstructionClass.create(BaseMove.class);

        @Def({REG, HINT}) protected AllocatableValue result;

        private final GraalHotSpotVMConfig config;

        public BaseMove(AllocatableValue result, GraalHotSpotVMConfig config) {

            super(TYPE);

            this.result = result;

            this.config = config;

        }

        @Override

        public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {

            masm.movq(asRegister(result), masm.getPlaceholder(-1));

            crb.recordMark(config.MARKID_NARROW_KLASS_BASE_ADDRESS);

        }

    }

    public static final class HotSpotLoadMetaspaceConstantOp extends AMD64LIRInstruction implements LoadConstantOp {

        public static final LIRInstructionClass<HotSpotLoadMetaspaceConstantOp> TYPE = LIRInstructionClass.create(HotSpotLoadMetaspaceConstantOp.class);

        @Def({REG, STACK}) private AllocatableValue result;

        private final HotSpotMetaspaceConstant input;

        public HotSpotLoadMetaspaceConstantOp(AllocatableValue result, HotSpotMetaspaceConstant input) {

            super(TYPE);

            this.result = result;

            this.input = input;

        }

        @Override

        public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {

            if (GeneratePIC.getValue(crb.getOptions())) {

                throw GraalError.shouldNotReachHere("Metaspace constant load should not be happening directly");

            }

            boolean compressed = input.isCompressed();

            if (isRegister(result)) {

                if (compressed) {

                    crb.recordInlineDataInCode(input);

                    masm.movl(asRegister(result), 0xDEADDEAD);

                } else {

                    crb.recordInlineDataInCode(input);

                    masm.movq(asRegister(result), 0xDEADDEADDEADDEADL);

                }

            } else {

                assert isStackSlot(result);

                if (compressed) {

                    crb.recordInlineDataInCode(input);

                    masm.movl((AMD64Address) crb.asAddress(result), 0xDEADDEAD);

                } else {

                    throw GraalError.shouldNotReachHere("Cannot store 64-bit constants to memory");

                }

            }

        }

        @Override

        public Constant getConstant() {

            return input;

        }

        @Override

        public AllocatableValue getResult() {

            return result;

        }

    }

    public static void decodeKlassPointer(CompilationResultBuilder crb, AMD64MacroAssembler masm, Register register, Register scratch, AMD64Address address, GraalHotSpotVMConfig config) {

        CompressEncoding encoding = config.getKlassEncoding();

        masm.movl(register, address);

        if (encoding.getShift() != 0) {

            masm.shlq(register, encoding.getShift());

        }

        boolean pic = GeneratePIC.getValue(crb.getOptions());

        if (pic || encoding.hasBase()) {

            if (pic) {

                masm.movq(scratch, masm.getPlaceholder(-1));

                crb.recordMark(config.MARKID_NARROW_KLASS_BASE_ADDRESS);

            } else {

                assert encoding.getBase() != 0;

                masm.movq(scratch, encoding.getBase());

            }

            masm.addq(register, scratch);

        }

    }

}