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package com.oracle.truffle.llvm.nodes.vector;

import com.oracle.truffle.api.dsl.NodeChild;
import com.oracle.truffle.api.dsl.NodeField;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.nodes.ExplodeLoop;
import com.oracle.truffle.api.profiles.ConditionProfile;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMExpressionNode;
import com.oracle.truffle.llvm.runtime.pointer.LLVMNativePointer;
import com.oracle.truffle.llvm.runtime.pointer.LLVMPointer;
import com.oracle.truffle.llvm.runtime.vector.LLVMDoubleVector;
import com.oracle.truffle.llvm.runtime.vector.LLVMFloatVector;
import com.oracle.truffle.llvm.runtime.vector.LLVMI16Vector;
import com.oracle.truffle.llvm.runtime.vector.LLVMI1Vector;
import com.oracle.truffle.llvm.runtime.vector.LLVMI32Vector;
import com.oracle.truffle.llvm.runtime.vector.LLVMI64Vector;
import com.oracle.truffle.llvm.runtime.vector.LLVMI8Vector;
import com.oracle.truffle.llvm.runtime.vector.LLVMPointerVector;

@NodeChild(value = "left")
@NodeChild(value = "right")
@NodeChild(value = "mask", type = LLVMExpressionNode.class)
@NodeField(name = "vectorLength", type = int.class)
public abstract class LLVMShuffleVectorNode extends LLVMExpressionNode {

    protected final ConditionProfile conditionProfile = ConditionProfile.createCountingProfile();

    protected abstract int getVectorLength();

    public abstract static class LLVMShuffleI1VectorNode extends LLVMShuffleVectorNode {
        @Specialization
        @ExplodeLoop
        protected LLVMI1Vector doI1Vector(LLVMI1Vector leftVector, LLVMI1Vector rightVector, LLVMI32Vector maskVector) {
            assert maskVector.getLength() == getVectorLength();
            boolean[] newValues = new boolean[getVectorLength()];
            int leftVectorLength = leftVector.getLength();
            for (int i = 0; i < getVectorLength(); i++) {
                int element = maskVector.getValue(i);
                newValues[i] = conditionProfile.profile(element < leftVectorLength) ? leftVector.getValue(element) : rightVector.getValue(element - leftVectorLength);
            }
            return LLVMI1Vector.create(newValues);
        }
    }

    public abstract static class LLVMShuffleI8VectorNode extends LLVMShuffleVectorNode {
        @Specialization
        @ExplodeLoop
        protected LLVMI8Vector doI8Vector(LLVMI8Vector leftVector, LLVMI8Vector rightVector, LLVMI32Vector maskVector) {
            assert maskVector.getLength() == getVectorLength();
            byte[] newValues = new byte[getVectorLength()];
            int leftVectorLength = leftVector.getLength();
            for (int i = 0; i < getVectorLength(); i++) {
                int element = maskVector.getValue(i);
                newValues[i] = conditionProfile.profile(element < leftVectorLength) ? leftVector.getValue(element) : rightVector.getValue(element - leftVectorLength);
            }
            return LLVMI8Vector.create(newValues);
        }
    }

    public abstract static class LLVMShuffleI16VectorNode extends LLVMShuffleVectorNode {
        @Specialization
        @ExplodeLoop
        protected LLVMI16Vector doI8Vector(LLVMI16Vector leftVector, LLVMI16Vector rightVector, LLVMI32Vector maskVector) {
            assert maskVector.getLength() == getVectorLength();
            short[] newValues = new short[getVectorLength()];
            int leftVectorLength = leftVector.getLength();
            for (int i = 0; i < getVectorLength(); i++) {
                int element = maskVector.getValue(i);
                newValues[i] = conditionProfile.profile(element < leftVectorLength) ? leftVector.getValue(element) : rightVector.getValue(element - leftVectorLength);
            }
            return LLVMI16Vector.create(newValues);
        }
    }

    public abstract static class LLVMShuffleI32VectorNode extends LLVMShuffleVectorNode {
        @Specialization
        @ExplodeLoop
        protected LLVMI32Vector doI32Vector(LLVMI32Vector leftVector, LLVMI32Vector rightVector, LLVMI32Vector maskVector) {
            assert maskVector.getLength() == getVectorLength();
            int[] newValues = new int[getVectorLength()];
            int leftVectorLength = leftVector.getLength();
            for (int i = 0; i < getVectorLength(); i++) {
                int element = maskVector.getValue(i);
                newValues[i] = conditionProfile.profile(element < leftVectorLength) ? leftVector.getValue(element) : rightVector.getValue(element - leftVectorLength);
            }
            return LLVMI32Vector.create(newValues);
        }
    }

    public abstract static class LLVMShuffleI64VectorNode extends LLVMShuffleVectorNode {
        @Specialization
        @ExplodeLoop
        protected LLVMI64Vector doI64Vector(LLVMI64Vector leftVector, LLVMI64Vector rightVector, LLVMI32Vector maskVector) {
            assert maskVector.getLength() == getVectorLength();
            long[] newValues = new long[getVectorLength()];
            int leftVectorLength = leftVector.getLength();
            for (int i = 0; i < getVectorLength(); i++) {
                int element = maskVector.getValue(i);
                newValues[i] = conditionProfile.profile(element < leftVectorLength) ? leftVector.getValue(element) : rightVector.getValue(element - leftVectorLength);
            }
            return LLVMI64Vector.create(newValues);
        }

        @Specialization
        @ExplodeLoop
        protected LLVMPointerVector doPointerVector(LLVMPointerVector leftVector, LLVMI64Vector rightVector, LLVMI32Vector maskVector) {
            assert maskVector.getLength() == getVectorLength();
            LLVMPointer[] newValues = new LLVMPointer[getVectorLength()];
            int leftVectorLength = leftVector.getLength();
            for (int i = 0; i < getVectorLength(); i++) {
                int element = maskVector.getValue(i);
                newValues[i] = conditionProfile.profile(element < leftVectorLength) ? leftVector.getValue(element) : LLVMNativePointer.create(rightVector.getValue(element - leftVectorLength));
            }
            return LLVMPointerVector.create(newValues);
        }

        @Specialization
        @ExplodeLoop
        protected LLVMPointerVector doPointerVector(LLVMI64Vector leftVector, LLVMPointerVector rightVector, LLVMI32Vector maskVector) {
            assert maskVector.getLength() == getVectorLength();
            LLVMPointer[] newValues = new LLVMPointer[getVectorLength()];
            int leftVectorLength = leftVector.getLength();
            for (int i = 0; i < getVectorLength(); i++) {
                int element = maskVector.getValue(i);
                newValues[i] = conditionProfile.profile(element < leftVectorLength) ? LLVMNativePointer.create(leftVector.getValue(element)) : rightVector.getValue(element - leftVectorLength);
            }
            return LLVMPointerVector.create(newValues);
        }

        @Specialization
        @ExplodeLoop
        protected LLVMPointerVector doPointerVector(LLVMPointerVector leftVector, LLVMPointerVector rightVector, LLVMI32Vector maskVector) {
            assert maskVector.getLength() == getVectorLength();
            LLVMPointer[] newValues = new LLVMPointer[getVectorLength()];
            int leftVectorLength = leftVector.getLength();
            for (int i = 0; i < getVectorLength(); i++) {
                int element = maskVector.getValue(i);
                newValues[i] = conditionProfile.profile(element < leftVectorLength) ? leftVector.getValue(element) : rightVector.getValue(element - leftVectorLength);
            }
            return LLVMPointerVector.create(newValues);
        }
    }

    public abstract static class LLVMShuffleFloatVectorNode extends LLVMShuffleVectorNode {
        @Specialization
        @ExplodeLoop
        protected LLVMFloatVector doOp(LLVMFloatVector leftVector, LLVMFloatVector rightVector, LLVMI32Vector maskVector) {
            assert maskVector.getLength() == getVectorLength();
            float[] newValues = new float[getVectorLength()];
            int leftVectorLength = leftVector.getLength();
            for (int i = 0; i < getVectorLength(); i++) {
                int element = maskVector.getValue(i);
                newValues[i] = conditionProfile.profile(element < leftVectorLength) ? leftVector.getValue(element) : rightVector.getValue(element - leftVectorLength);
            }
            return LLVMFloatVector.create(newValues);
        }
    }

    public abstract static class LLVMShuffleDoubleVectorNode extends LLVMShuffleVectorNode {
        @Specialization
        @ExplodeLoop
        protected LLVMDoubleVector doOp(LLVMDoubleVector leftVector, LLVMDoubleVector rightVector, LLVMI32Vector maskVector) {
            assert maskVector.getLength() == getVectorLength();
            double[] newValues = new double[getVectorLength()];
            int leftVectorLength = leftVector.getLength();
            for (int i = 0; i < getVectorLength(); i++) {
                int element = maskVector.getValue(i);
                newValues[i] = conditionProfile.profile(element < leftVectorLength) ? leftVector.getValue(element) : rightVector.getValue(element - leftVectorLength);
            }
            return LLVMDoubleVector.create(newValues);
        }
    }
}
