1 /*
  2  * Copyright (c) 2017, 2021, Oracle and/or its affiliates. All rights reserved.
  3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  4  *
  5  * This code is free software; you can redistribute it and/or modify it
  6  * under the terms of the GNU General Public License version 2 only, as
  7  * published by the Free Software Foundation.  Oracle designates this
  8  * particular file as subject to the "Classpath" exception as provided
  9  * by Oracle in the LICENSE file that accompanied this code.
 10  *
 11  * This code is distributed in the hope that it will be useful, but WITHOUT
 12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 14  * version 2 for more details (a copy is included in the LICENSE file that
 15  * accompanied this code).
 16  *
 17  * You should have received a copy of the GNU General Public License version
 18  * 2 along with this work; if not, write to the Free Software Foundation,
 19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 20  *
 21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 22  * or visit www.oracle.com if you need additional information or have any
 23  * questions.
 24  */
 25 package jdk.incubator.vector;
 26 
 27 import java.nio.ByteBuffer;
 28 import java.util.Arrays;
 29 import java.util.Objects;
 30 import java.util.function.IntUnaryOperator;
 31 
 32 import jdk.internal.vm.annotation.ForceInline;
 33 import jdk.internal.vm.vector.VectorSupport;
 34 
 35 import static jdk.internal.vm.vector.VectorSupport.*;
 36 
 37 import static jdk.incubator.vector.VectorOperators.*;
 38 
 39 // -- This file was mechanically generated: Do not edit! -- //
 40 
 41 @SuppressWarnings("cast")  // warning: redundant cast
 42 final class Double64Vector extends DoubleVector {
 43     static final DoubleSpecies VSPECIES =
 44         (DoubleSpecies) DoubleVector.SPECIES_64;
 45 
 46     static final VectorShape VSHAPE =
 47         VSPECIES.vectorShape();
 48 
 49     static final Class<Double64Vector> VCLASS = Double64Vector.class;
 50 
 51     static final int VSIZE = VSPECIES.vectorBitSize();
 52 
 53     static final int VLENGTH = VSPECIES.laneCount(); // used by the JVM
 54 
 55     static final Class<Double> ETYPE = double.class; // used by the JVM
 56 
 57     Double64Vector(double[] v) {
 58         super(v);
 59     }
 60 
 61     // For compatibility as Double64Vector::new,
 62     // stored into species.vectorFactory.
 63     Double64Vector(Object v) {
 64         this((double[]) v);
 65     }
 66 
 67     static final Double64Vector ZERO = new Double64Vector(new double[VLENGTH]);
 68     static final Double64Vector IOTA = new Double64Vector(VSPECIES.iotaArray());
 69 
 70     static {
 71         // Warm up a few species caches.
 72         // If we do this too much we will
 73         // get NPEs from bootstrap circularity.
 74         VSPECIES.dummyVector();
 75         VSPECIES.withLanes(LaneType.BYTE);
 76     }
 77 
 78     // Specialized extractors
 79 
 80     @ForceInline
 81     final @Override
 82     public DoubleSpecies vspecies() {
 83         // ISSUE:  This should probably be a @Stable
 84         // field inside AbstractVector, rather than
 85         // a megamorphic method.
 86         return VSPECIES;
 87     }
 88 
 89     @ForceInline
 90     @Override
 91     public final Class<Double> elementType() { return double.class; }
 92 
 93     @ForceInline
 94     @Override
 95     public final int elementSize() { return Double.SIZE; }
 96 
 97     @ForceInline
 98     @Override
 99     public final VectorShape shape() { return VSHAPE; }
100 
101     @ForceInline
102     @Override
103     public final int length() { return VLENGTH; }
104 
105     @ForceInline
106     @Override
107     public final int bitSize() { return VSIZE; }
108 
109     @ForceInline
110     @Override
111     public final int byteSize() { return VSIZE / Byte.SIZE; }
112 
113     /*package-private*/
114     @ForceInline
115     final @Override
116     double[] vec() {
117         return (double[])getPayload();
118     }
119 
120     // Virtualized constructors
121 
122     @Override
123     @ForceInline
124     public final Double64Vector broadcast(double e) {
125         return (Double64Vector) super.broadcastTemplate(e);  // specialize
126     }
127 
128     @Override
129     @ForceInline
130     public final Double64Vector broadcast(long e) {
131         return (Double64Vector) super.broadcastTemplate(e);  // specialize
132     }
133 
134     @Override
135     @ForceInline
136     Double64Mask maskFromArray(boolean[] bits) {
137         return new Double64Mask(bits);
138     }
139 
140     @Override
141     @ForceInline
142     Double64Shuffle iotaShuffle() { return Double64Shuffle.IOTA; }
143 
144     @ForceInline
145     Double64Shuffle iotaShuffle(int start, int step, boolean wrap) {
146       if (wrap) {
147         return (Double64Shuffle)VectorSupport.shuffleIota(ETYPE, Double64Shuffle.class, VSPECIES, VLENGTH, start, step, 1,
148                 (l, lstart, lstep, s) -> s.shuffleFromOp(i -> (VectorIntrinsics.wrapToRange(i*lstep + lstart, l))));
149       } else {
150         return (Double64Shuffle)VectorSupport.shuffleIota(ETYPE, Double64Shuffle.class, VSPECIES, VLENGTH, start, step, 0,
151                 (l, lstart, lstep, s) -> s.shuffleFromOp(i -> (i*lstep + lstart)));
152       }
153     }
154 
155     @Override
156     @ForceInline
157     Double64Shuffle shuffleFromBytes(byte[] reorder) { return new Double64Shuffle(reorder); }
158 
159     @Override
160     @ForceInline
161     Double64Shuffle shuffleFromArray(int[] indexes, int i) { return new Double64Shuffle(indexes, i); }
162 
163     @Override
164     @ForceInline
165     Double64Shuffle shuffleFromOp(IntUnaryOperator fn) { return new Double64Shuffle(fn); }
166 
167     // Make a vector of the same species but the given elements:
168     @ForceInline
169     final @Override
170     Double64Vector vectorFactory(double[] vec) {
171         return new Double64Vector(vec);
172     }
173 
174     @ForceInline
175     final @Override
176     Byte64Vector asByteVectorRaw() {
177         return (Byte64Vector) super.asByteVectorRawTemplate();  // specialize
178     }
179 
180     @ForceInline
181     final @Override
182     AbstractVector<?> asVectorRaw(LaneType laneType) {
183         return super.asVectorRawTemplate(laneType);  // specialize
184     }
185 
186     // Unary operator
187 
188     @ForceInline
189     final @Override
190     Double64Vector uOp(FUnOp f) {
191         return (Double64Vector) super.uOpTemplate(f);  // specialize
192     }
193 
194     @ForceInline
195     final @Override
196     Double64Vector uOp(VectorMask<Double> m, FUnOp f) {
197         return (Double64Vector)
198             super.uOpTemplate((Double64Mask)m, f);  // specialize
199     }
200 
201     // Binary operator
202 
203     @ForceInline
204     final @Override
205     Double64Vector bOp(Vector<Double> v, FBinOp f) {
206         return (Double64Vector) super.bOpTemplate((Double64Vector)v, f);  // specialize
207     }
208 
209     @ForceInline
210     final @Override
211     Double64Vector bOp(Vector<Double> v,
212                      VectorMask<Double> m, FBinOp f) {
213         return (Double64Vector)
214             super.bOpTemplate((Double64Vector)v, (Double64Mask)m,
215                               f);  // specialize
216     }
217 
218     // Ternary operator
219 
220     @ForceInline
221     final @Override
222     Double64Vector tOp(Vector<Double> v1, Vector<Double> v2, FTriOp f) {
223         return (Double64Vector)
224             super.tOpTemplate((Double64Vector)v1, (Double64Vector)v2,
225                               f);  // specialize
226     }
227 
228     @ForceInline
229     final @Override
230     Double64Vector tOp(Vector<Double> v1, Vector<Double> v2,
231                      VectorMask<Double> m, FTriOp f) {
232         return (Double64Vector)
233             super.tOpTemplate((Double64Vector)v1, (Double64Vector)v2,
234                               (Double64Mask)m, f);  // specialize
235     }
236 
237     @ForceInline
238     final @Override
239     double rOp(double v, FBinOp f) {
240         return super.rOpTemplate(v, f);  // specialize
241     }
242 
243     @Override
244     @ForceInline
245     public final <F>
246     Vector<F> convertShape(VectorOperators.Conversion<Double,F> conv,
247                            VectorSpecies<F> rsp, int part) {
248         return super.convertShapeTemplate(conv, rsp, part);  // specialize
249     }
250 
251     @Override
252     @ForceInline
253     public final <F>
254     Vector<F> reinterpretShape(VectorSpecies<F> toSpecies, int part) {
255         return super.reinterpretShapeTemplate(toSpecies, part);  // specialize
256     }
257 
258     // Specialized algebraic operations:
259 
260     // The following definition forces a specialized version of this
261     // crucial method into the v-table of this class.  A call to add()
262     // will inline to a call to lanewise(ADD,), at which point the JIT
263     // intrinsic will have the opcode of ADD, plus all the metadata
264     // for this particular class, enabling it to generate precise
265     // code.
266     //
267     // There is probably no benefit to the JIT to specialize the
268     // masked or broadcast versions of the lanewise method.
269 
270     @Override
271     @ForceInline
272     public Double64Vector lanewise(Unary op) {
273         return (Double64Vector) super.lanewiseTemplate(op);  // specialize
274     }
275 
276     @Override
277     @ForceInline
278     public Double64Vector lanewise(Binary op, Vector<Double> v) {
279         return (Double64Vector) super.lanewiseTemplate(op, v);  // specialize
280     }
281 
282 
283     /*package-private*/
284     @Override
285     @ForceInline
286     public final
287     Double64Vector
288     lanewise(VectorOperators.Ternary op, Vector<Double> v1, Vector<Double> v2) {
289         return (Double64Vector) super.lanewiseTemplate(op, v1, v2);  // specialize
290     }
291 
292     @Override
293     @ForceInline
294     public final
295     Double64Vector addIndex(int scale) {
296         return (Double64Vector) super.addIndexTemplate(scale);  // specialize
297     }
298 
299     // Type specific horizontal reductions
300 
301     @Override
302     @ForceInline
303     public final double reduceLanes(VectorOperators.Associative op) {
304         return super.reduceLanesTemplate(op);  // specialized
305     }
306 
307     @Override
308     @ForceInline
309     public final double reduceLanes(VectorOperators.Associative op,
310                                     VectorMask<Double> m) {
311         return super.reduceLanesTemplate(op, m);  // specialized
312     }
313 
314     @Override
315     @ForceInline
316     public final long reduceLanesToLong(VectorOperators.Associative op) {
317         return (long) super.reduceLanesTemplate(op);  // specialized
318     }
319 
320     @Override
321     @ForceInline
322     public final long reduceLanesToLong(VectorOperators.Associative op,
323                                         VectorMask<Double> m) {
324         return (long) super.reduceLanesTemplate(op, m);  // specialized
325     }
326 
327     @ForceInline
328     public VectorShuffle<Double> toShuffle() {
329         return super.toShuffleTemplate(Double64Shuffle.class); // specialize
330     }
331 
332     // Specialized unary testing
333 
334     @Override
335     @ForceInline
336     public final Double64Mask test(Test op) {
337         return super.testTemplate(Double64Mask.class, op);  // specialize
338     }
339 
340     // Specialized comparisons
341 
342     @Override
343     @ForceInline
344     public final Double64Mask compare(Comparison op, Vector<Double> v) {
345         return super.compareTemplate(Double64Mask.class, op, v);  // specialize
346     }
347 
348     @Override
349     @ForceInline
350     public final Double64Mask compare(Comparison op, double s) {
351         return super.compareTemplate(Double64Mask.class, op, s);  // specialize
352     }
353 
354     @Override
355     @ForceInline
356     public final Double64Mask compare(Comparison op, long s) {
357         return super.compareTemplate(Double64Mask.class, op, s);  // specialize
358     }
359 
360     @Override
361     @ForceInline
362     public Double64Vector blend(Vector<Double> v, VectorMask<Double> m) {
363         return (Double64Vector)
364             super.blendTemplate(Double64Mask.class,
365                                 (Double64Vector) v,
366                                 (Double64Mask) m);  // specialize
367     }
368 
369     @Override
370     @ForceInline
371     public Double64Vector slice(int origin, Vector<Double> v) {
372         return (Double64Vector) super.sliceTemplate(origin, v);  // specialize
373     }
374 
375     @Override
376     @ForceInline
377     public Double64Vector slice(int origin) {
378         return (Double64Vector) super.sliceTemplate(origin);  // specialize
379     }
380 
381     @Override
382     @ForceInline
383     public Double64Vector unslice(int origin, Vector<Double> w, int part) {
384         return (Double64Vector) super.unsliceTemplate(origin, w, part);  // specialize
385     }
386 
387     @Override
388     @ForceInline
389     public Double64Vector unslice(int origin, Vector<Double> w, int part, VectorMask<Double> m) {
390         return (Double64Vector)
391             super.unsliceTemplate(Double64Mask.class,
392                                   origin, w, part,
393                                   (Double64Mask) m);  // specialize
394     }
395 
396     @Override
397     @ForceInline
398     public Double64Vector unslice(int origin) {
399         return (Double64Vector) super.unsliceTemplate(origin);  // specialize
400     }
401 
402     @Override
403     @ForceInline
404     public Double64Vector rearrange(VectorShuffle<Double> s) {
405         return (Double64Vector)
406             super.rearrangeTemplate(Double64Shuffle.class,
407                                     (Double64Shuffle) s);  // specialize
408     }
409 
410     @Override
411     @ForceInline
412     public Double64Vector rearrange(VectorShuffle<Double> shuffle,
413                                   VectorMask<Double> m) {
414         return (Double64Vector)
415             super.rearrangeTemplate(Double64Shuffle.class,
416                                     (Double64Shuffle) shuffle,
417                                     (Double64Mask) m);  // specialize
418     }
419 
420     @Override
421     @ForceInline
422     public Double64Vector rearrange(VectorShuffle<Double> s,
423                                   Vector<Double> v) {
424         return (Double64Vector)
425             super.rearrangeTemplate(Double64Shuffle.class,
426                                     (Double64Shuffle) s,
427                                     (Double64Vector) v);  // specialize
428     }
429 
430     @Override
431     @ForceInline
432     public Double64Vector selectFrom(Vector<Double> v) {
433         return (Double64Vector)
434             super.selectFromTemplate((Double64Vector) v);  // specialize
435     }
436 
437     @Override
438     @ForceInline
439     public Double64Vector selectFrom(Vector<Double> v,
440                                    VectorMask<Double> m) {
441         return (Double64Vector)
442             super.selectFromTemplate((Double64Vector) v,
443                                      (Double64Mask) m);  // specialize
444     }
445 
446 
447     @ForceInline
448     @Override
449     public double lane(int i) {
450         long bits;
451         switch(i) {
452             case 0: bits = laneHelper(0); break;
453             default: throw new IllegalArgumentException("Index " + i + " must be zero or positive, and less than " + VLENGTH);
454         }
455         return Double.longBitsToDouble(bits);
456     }
457 
458     public long laneHelper(int i) {
459         return (long) VectorSupport.extract(
460                      VCLASS, ETYPE, VLENGTH,
461                      this, i,
462                      (vec, ix) -> {
463                      double[] vecarr = vec.vec();
464                      return (long)Double.doubleToLongBits(vecarr[ix]);
465                      });
466     }
467 
468     @ForceInline
469     @Override
470     public Double64Vector withLane(int i, double e) {
471         switch(i) {
472             case 0: return withLaneHelper(0, e);
473             default: throw new IllegalArgumentException("Index " + i + " must be zero or positive, and less than " + VLENGTH);
474         }
475     }
476 
477     public Double64Vector withLaneHelper(int i, double e) {
478         return VectorSupport.insert(
479                                 VCLASS, ETYPE, VLENGTH,
480                                 this, i, (long)Double.doubleToLongBits(e),
481                                 (v, ix, bits) -> {
482                                     double[] res = v.vec().clone();
483                                     res[ix] = Double.longBitsToDouble((long)bits);
484                                     return v.vectorFactory(res);
485                                 });
486     }
487 
488     // Mask
489 
490     static final class Double64Mask extends AbstractMask<Double> {
491         static final int VLENGTH = VSPECIES.laneCount();    // used by the JVM
492         static final Class<Double> ETYPE = double.class; // used by the JVM
493 
494         Double64Mask(boolean[] bits) {
495             this(bits, 0);
496         }
497 
498         Double64Mask(boolean[] bits, int offset) {
499             super(prepare(bits, offset));
500         }
501 
502         Double64Mask(boolean val) {
503             super(prepare(val));
504         }
505 
506         private static boolean[] prepare(boolean[] bits, int offset) {
507             boolean[] newBits = new boolean[VSPECIES.laneCount()];
508             for (int i = 0; i < newBits.length; i++) {
509                 newBits[i] = bits[offset + i];
510             }
511             return newBits;
512         }
513 
514         private static boolean[] prepare(boolean val) {
515             boolean[] bits = new boolean[VSPECIES.laneCount()];
516             Arrays.fill(bits, val);
517             return bits;
518         }
519 
520         @ForceInline
521         final @Override
522         public DoubleSpecies vspecies() {
523             // ISSUE:  This should probably be a @Stable
524             // field inside AbstractMask, rather than
525             // a megamorphic method.
526             return VSPECIES;
527         }
528 
529         @ForceInline
530         boolean[] getBits() {
531             return (boolean[])getPayload();
532         }
533 
534         @Override
535         Double64Mask uOp(MUnOp f) {
536             boolean[] res = new boolean[vspecies().laneCount()];
537             boolean[] bits = getBits();
538             for (int i = 0; i < res.length; i++) {
539                 res[i] = f.apply(i, bits[i]);
540             }
541             return new Double64Mask(res);
542         }
543 
544         @Override
545         Double64Mask bOp(VectorMask<Double> m, MBinOp f) {
546             boolean[] res = new boolean[vspecies().laneCount()];
547             boolean[] bits = getBits();
548             boolean[] mbits = ((Double64Mask)m).getBits();
549             for (int i = 0; i < res.length; i++) {
550                 res[i] = f.apply(i, bits[i], mbits[i]);
551             }
552             return new Double64Mask(res);
553         }
554 
555         @ForceInline
556         @Override
557         public final
558         Double64Vector toVector() {
559             return (Double64Vector) super.toVectorTemplate();  // specialize
560         }
561 
562         /**
563          * Helper function for lane-wise mask conversions.
564          * This function kicks in after intrinsic failure.
565          */
566         @ForceInline
567         private final <E>
568         VectorMask<E> defaultMaskCast(AbstractSpecies<E> dsp) {
569             if (length() != dsp.laneCount())
570                 throw new IllegalArgumentException("VectorMask length and species length differ");
571             boolean[] maskArray = toArray();
572             return  dsp.maskFactory(maskArray).check(dsp);
573         }
574 
575         @Override
576         @ForceInline
577         public <E> VectorMask<E> cast(VectorSpecies<E> dsp) {
578             AbstractSpecies<E> species = (AbstractSpecies<E>) dsp;
579             if (length() != species.laneCount())
580                 throw new IllegalArgumentException("VectorMask length and species length differ");
581             if (VSIZE == species.vectorBitSize()) {
582                 Class<?> dtype = species.elementType();
583                 Class<?> dmtype = species.maskType();
584                 return VectorSupport.convert(VectorSupport.VECTOR_OP_REINTERPRET,
585                     this.getClass(), ETYPE, VLENGTH,
586                     dmtype, dtype, VLENGTH,
587                     this, species,
588                     Double64Mask::defaultMaskCast);
589             }
590             return this.defaultMaskCast(species);
591         }
592 
593         @Override
594         @ForceInline
595         public Double64Mask eq(VectorMask<Double> mask) {
596             Objects.requireNonNull(mask);
597             Double64Mask m = (Double64Mask)mask;
598             return xor(m.not());
599         }
600 
601         // Unary operations
602 
603         @Override
604         @ForceInline
605         public Double64Mask not() {
606             return xor(maskAll(true));
607         }
608 
609         // Binary operations
610 
611         @Override
612         @ForceInline
613         public Double64Mask and(VectorMask<Double> mask) {
614             Objects.requireNonNull(mask);
615             Double64Mask m = (Double64Mask)mask;
616             return VectorSupport.binaryOp(VECTOR_OP_AND, Double64Mask.class, long.class, VLENGTH,
617                                              this, m,
618                                              (m1, m2) -> m1.bOp(m2, (i, a, b) -> a & b));
619         }
620 
621         @Override
622         @ForceInline
623         public Double64Mask or(VectorMask<Double> mask) {
624             Objects.requireNonNull(mask);
625             Double64Mask m = (Double64Mask)mask;
626             return VectorSupport.binaryOp(VECTOR_OP_OR, Double64Mask.class, long.class, VLENGTH,
627                                              this, m,
628                                              (m1, m2) -> m1.bOp(m2, (i, a, b) -> a | b));
629         }
630 
631         @ForceInline
632         /* package-private */
633         Double64Mask xor(VectorMask<Double> mask) {
634             Objects.requireNonNull(mask);
635             Double64Mask m = (Double64Mask)mask;
636             return VectorSupport.binaryOp(VECTOR_OP_XOR, Double64Mask.class, long.class, VLENGTH,
637                                           this, m,
638                                           (m1, m2) -> m1.bOp(m2, (i, a, b) -> a ^ b));
639         }
640 
641         // Mask Query operations
642 
643         @Override
644         @ForceInline
645         public int trueCount() {
646             return VectorSupport.maskReductionCoerced(VECTOR_OP_MASK_TRUECOUNT, Double64Mask.class, long.class, VLENGTH, this,
647                                                       (m) -> trueCountHelper(((Double64Mask)m).getBits()));
648         }
649 
650         @Override
651         @ForceInline
652         public int firstTrue() {
653             return VectorSupport.maskReductionCoerced(VECTOR_OP_MASK_FIRSTTRUE, Double64Mask.class, long.class, VLENGTH, this,
654                                                       (m) -> firstTrueHelper(((Double64Mask)m).getBits()));
655         }
656 
657         @Override
658         @ForceInline
659         public int lastTrue() {
660             return VectorSupport.maskReductionCoerced(VECTOR_OP_MASK_LASTTRUE, Double64Mask.class, long.class, VLENGTH, this,
661                                                       (m) -> lastTrueHelper(((Double64Mask)m).getBits()));
662         }
663 
664         // Reductions
665 
666         @Override
667         @ForceInline
668         public boolean anyTrue() {
669             return VectorSupport.test(BT_ne, Double64Mask.class, long.class, VLENGTH,
670                                          this, vspecies().maskAll(true),
671                                          (m, __) -> anyTrueHelper(((Double64Mask)m).getBits()));
672         }
673 
674         @Override
675         @ForceInline
676         public boolean allTrue() {
677             return VectorSupport.test(BT_overflow, Double64Mask.class, long.class, VLENGTH,
678                                          this, vspecies().maskAll(true),
679                                          (m, __) -> allTrueHelper(((Double64Mask)m).getBits()));
680         }
681 
682         @ForceInline
683         /*package-private*/
684         static Double64Mask maskAll(boolean bit) {
685             return VectorSupport.broadcastCoerced(Double64Mask.class, long.class, VLENGTH,
686                                                   (bit ? -1 : 0), null,
687                                                   (v, __) -> (v != 0 ? TRUE_MASK : FALSE_MASK));
688         }
689         private static final Double64Mask  TRUE_MASK = new Double64Mask(true);
690         private static final Double64Mask FALSE_MASK = new Double64Mask(false);
691 
692     }
693 
694     // Shuffle
695 
696     static final class Double64Shuffle extends AbstractShuffle<Double> {
697         static final int VLENGTH = VSPECIES.laneCount();    // used by the JVM
698         static final Class<Double> ETYPE = double.class; // used by the JVM
699 
700         Double64Shuffle(byte[] reorder) {
701             super(VLENGTH, reorder);
702         }
703 
704         public Double64Shuffle(int[] reorder) {
705             super(VLENGTH, reorder);
706         }
707 
708         public Double64Shuffle(int[] reorder, int i) {
709             super(VLENGTH, reorder, i);
710         }
711 
712         public Double64Shuffle(IntUnaryOperator fn) {
713             super(VLENGTH, fn);
714         }
715 
716         @Override
717         public DoubleSpecies vspecies() {
718             return VSPECIES;
719         }
720 
721         static {
722             // There must be enough bits in the shuffle lanes to encode
723             // VLENGTH valid indexes and VLENGTH exceptional ones.
724             assert(VLENGTH < Byte.MAX_VALUE);
725             assert(Byte.MIN_VALUE <= -VLENGTH);
726         }
727         static final Double64Shuffle IOTA = new Double64Shuffle(IDENTITY);
728 
729         @Override
730         @ForceInline
731         public Double64Vector toVector() {
732             return VectorSupport.shuffleToVector(VCLASS, ETYPE, Double64Shuffle.class, this, VLENGTH,
733                                                     (s) -> ((Double64Vector)(((AbstractShuffle<Double>)(s)).toVectorTemplate())));
734         }
735 
736         @Override
737         @ForceInline
738         public <F> VectorShuffle<F> cast(VectorSpecies<F> s) {
739             AbstractSpecies<F> species = (AbstractSpecies<F>) s;
740             if (length() != species.laneCount())
741                 throw new IllegalArgumentException("VectorShuffle length and species length differ");
742             int[] shuffleArray = toArray();
743             return s.shuffleFromArray(shuffleArray, 0).check(s);
744         }
745 
746         @ForceInline
747         @Override
748         public Double64Shuffle rearrange(VectorShuffle<Double> shuffle) {
749             Double64Shuffle s = (Double64Shuffle) shuffle;
750             byte[] reorder1 = reorder();
751             byte[] reorder2 = s.reorder();
752             byte[] r = new byte[reorder1.length];
753             for (int i = 0; i < reorder1.length; i++) {
754                 int ssi = reorder2[i];
755                 r[i] = reorder1[ssi];  // throws on exceptional index
756             }
757             return new Double64Shuffle(r);
758         }
759     }
760 
761     // ================================================
762 
763     // Specialized low-level memory operations.
764 
765     @ForceInline
766     @Override
767     final
768     DoubleVector fromArray0(double[] a, int offset) {
769         return super.fromArray0Template(a, offset);  // specialize
770     }
771 
772 
773 
774     @ForceInline
775     @Override
776     final
777     DoubleVector fromByteArray0(byte[] a, int offset) {
778         return super.fromByteArray0Template(a, offset);  // specialize
779     }
780 
781     @ForceInline
782     @Override
783     final
784     DoubleVector fromByteBuffer0(ByteBuffer bb, int offset) {
785         return super.fromByteBuffer0Template(bb, offset);  // specialize
786     }
787 
788     @ForceInline
789     @Override
790     final
791     void intoArray0(double[] a, int offset) {
792         super.intoArray0Template(a, offset);  // specialize
793     }
794 
795     @ForceInline
796     @Override
797     final
798     void intoByteArray0(byte[] a, int offset) {
799         super.intoByteArray0Template(a, offset);  // specialize
800     }
801 
802     // End of specialized low-level memory operations.
803 
804     // ================================================
805 
806 }