--- /dev/null	2019-04-16 10:48:15.000000000 -0700
+++ new/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/AbstractSpecies.java	2019-04-16 10:48:14.906010300 -0700
@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2017, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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
+ * or visit www.oracle.com if you need additional information or have
+ * questions.
+ */
+package jdk.incubator.vector;
+
+import jdk.internal.vm.annotation.ForceInline;
+import jdk.internal.vm.annotation.Stable;
+import java.util.function.Function;
+import java.util.function.IntUnaryOperator;
+
+abstract class AbstractSpecies<E> implements VectorSpecies<E> {
+    @FunctionalInterface
+    interface fShuffleFromArray<E> {
+        VectorShuffle<E> apply(int[] reorder, int idx);
+    }
+
+    final Function<boolean[], VectorMask<E>> maskFactory;
+    final Function<IntUnaryOperator, VectorShuffle<E>> shuffleFromOpFactory;
+    final fShuffleFromArray<E> shuffleFromArrayFactory;
+
+    @Stable
+    protected final VectorShape shape;
+    @Stable
+    protected final Class<E> elementType;
+    @Stable
+    protected final int elementSize;
+    @Stable
+    protected final Class<?> boxType;
+    @Stable
+    protected final Class<?> maskType;
+    @Stable
+    protected final VectorShape indexShape;
+
+    AbstractSpecies(VectorShape shape, Class<E> elementType, int elementSize,
+                    Class<?> boxType, Class<?> maskType, Function<boolean[], VectorMask<E>> maskFactory,
+                    Function<IntUnaryOperator, VectorShuffle<E>> shuffleFromOpFactory,
+                    fShuffleFromArray<E> shuffleFromArrayFactory) {
+
+        this.maskFactory = maskFactory;
+        this.shuffleFromArrayFactory = shuffleFromArrayFactory;
+        this.shuffleFromOpFactory = shuffleFromOpFactory;
+
+        this.shape = shape;
+        this.elementType = elementType;
+        this.elementSize = elementSize;
+        this.boxType = boxType;
+        this.maskType = maskType;
+
+        if (boxType == Long64Vector.class || boxType == Double64Vector.class) {
+            indexShape = VectorShape.S_64_BIT;
+        }
+        else {
+            int bitSize = Vector.bitSizeForVectorLength(int.class, shape.bitSize() / elementSize);
+            indexShape = VectorShape.forBitSize(bitSize);
+        }
+    }
+
+    @Override
+    @ForceInline
+    public int bitSize() {
+        return shape.bitSize();
+    }
+
+    @Override
+    @ForceInline
+    public int length() {
+        return shape.bitSize() / elementSize;
+    }
+
+    @Override
+    @ForceInline
+    public Class<E> elementType() {
+        return elementType;
+    }
+
+    @Override
+    @ForceInline
+    public Class<?> boxType() {
+        return boxType;
+    }
+
+    @Override
+    @ForceInline
+    public Class<?> maskType() {
+        return maskType;
+    }
+
+    @Override
+    @ForceInline
+    public int elementSize() {
+        return elementSize;
+    }
+
+    @Override
+    @ForceInline
+    public VectorShape shape() {
+        return shape;
+    }
+
+    @Override
+    @ForceInline
+    public VectorShape indexShape() { return indexShape; }
+
+    @Override
+    public String toString() {
+        return new StringBuilder("Shape[")
+                .append(bitSize()).append(" bits, ")
+                .append(length()).append(" ").append(elementType.getSimpleName()).append("s x ")
+                .append(elementSize()).append(" bits")
+                .append("]")
+                .toString();
+    }
+
+    interface FOpm {
+        boolean apply(int i);
+    }
+
+    VectorMask<E> opm(AbstractSpecies.FOpm f) {
+        boolean[] res = new boolean[length()];
+        for (int i = 0; i < length(); i++) {
+            res[i] = f.apply(i);
+        }
+        return maskFactory.apply(res);
+    }
+}