1 /*
  2  * Copyright (c) 2017, 2022, 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.util.Arrays;
 28 import java.util.Objects;
 29 import java.util.function.IntUnaryOperator;
 30 
 31 import jdk.incubator.foreign.MemorySegment;
 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 Double256Vector extends DoubleVector {
 43     static final DoubleSpecies VSPECIES =
 44         (DoubleSpecies) DoubleVector.SPECIES_256;
 45 
 46     static final VectorShape VSHAPE =
 47         VSPECIES.vectorShape();
 48 
 49     static final Class<Double256Vector> VCLASS = Double256Vector.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     Double256Vector(double[] v) {
 58         super(v);
 59     }
 60 
 61     // For compatibility as Double256Vector::new,
 62     // stored into species.vectorFactory.
 63     Double256Vector(Object v) {
 64         this((double[]) v);
 65     }
 66 
 67     static final Double256Vector ZERO = new Double256Vector(new double[VLENGTH]);
 68     static final Double256Vector IOTA = new Double256Vector(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 Double256Vector broadcast(double e) {
125         return (Double256Vector) super.broadcastTemplate(e);  // specialize
126     }
127 
128     @Override
129     @ForceInline
130     public final Double256Vector broadcast(long e) {
131         return (Double256Vector) super.broadcastTemplate(e);  // specialize
132     }
133 
134     @Override
135     @ForceInline
136     Double256Mask maskFromArray(boolean[] bits) {
137         return new Double256Mask(bits);
138     }
139 
140     @Override
141     @ForceInline
142     Double256Shuffle iotaShuffle() { return Double256Shuffle.IOTA; }
143 
144     @ForceInline
145     Double256Shuffle iotaShuffle(int start, int step, boolean wrap) {
146       if (wrap) {
147         return (Double256Shuffle)VectorSupport.shuffleIota(ETYPE, Double256Shuffle.class, VSPECIES, VLENGTH, start, step, 1,
148                 (l, lstart, lstep, s) -> s.shuffleFromOp(i -> (VectorIntrinsics.wrapToRange(i*lstep + lstart, l))));
149       } else {
150         return (Double256Shuffle)VectorSupport.shuffleIota(ETYPE, Double256Shuffle.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     Double256Shuffle shuffleFromBytes(byte[] reorder) { return new Double256Shuffle(reorder); }
158 
159     @Override
160     @ForceInline
161     Double256Shuffle shuffleFromArray(int[] indexes, int i) { return new Double256Shuffle(indexes, i); }
162 
163     @Override
164     @ForceInline
165     Double256Shuffle shuffleFromOp(IntUnaryOperator fn) { return new Double256Shuffle(fn); }
166 
167     // Make a vector of the same species but the given elements:
168     @ForceInline
169     final @Override
170     Double256Vector vectorFactory(double[] vec) {
171         return new Double256Vector(vec);
172     }
173 
174     @ForceInline
175     final @Override
176     Byte256Vector asByteVectorRaw() {
177         return (Byte256Vector) 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     Double256Vector uOp(FUnOp f) {
191         return (Double256Vector) super.uOpTemplate(f);  // specialize
192     }
193 
194     @ForceInline
195     final @Override
196     Double256Vector uOp(VectorMask<Double> m, FUnOp f) {
197         return (Double256Vector)
198             super.uOpTemplate((Double256Mask)m, f);  // specialize
199     }
200 
201     // Binary operator
202 
203     @ForceInline
204     final @Override
205     Double256Vector bOp(Vector<Double> v, FBinOp f) {
206         return (Double256Vector) super.bOpTemplate((Double256Vector)v, f);  // specialize
207     }
208 
209     @ForceInline
210     final @Override
211     Double256Vector bOp(Vector<Double> v,
212                      VectorMask<Double> m, FBinOp f) {
213         return (Double256Vector)
214             super.bOpTemplate((Double256Vector)v, (Double256Mask)m,
215                               f);  // specialize
216     }
217 
218     // Ternary operator
219 
220     @ForceInline
221     final @Override
222     Double256Vector tOp(Vector<Double> v1, Vector<Double> v2, FTriOp f) {
223         return (Double256Vector)
224             super.tOpTemplate((Double256Vector)v1, (Double256Vector)v2,
225                               f);  // specialize
226     }
227 
228     @ForceInline
229     final @Override
230     Double256Vector tOp(Vector<Double> v1, Vector<Double> v2,
231                      VectorMask<Double> m, FTriOp f) {
232         return (Double256Vector)
233             super.tOpTemplate((Double256Vector)v1, (Double256Vector)v2,
234                               (Double256Mask)m, f);  // specialize
235     }
236 
237     @ForceInline
238     final @Override
239     double rOp(double v, VectorMask<Double> m, FBinOp f) {
240         return super.rOpTemplate(v, m, 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 Double256Vector lanewise(Unary op) {
273         return (Double256Vector) super.lanewiseTemplate(op);  // specialize
274     }
275 
276     @Override
277     @ForceInline
278     public Double256Vector lanewise(Unary op, VectorMask<Double> m) {
279         return (Double256Vector) super.lanewiseTemplate(op, Double256Mask.class, (Double256Mask) m);  // specialize
280     }
281 
282     @Override
283     @ForceInline
284     public Double256Vector lanewise(Binary op, Vector<Double> v) {
285         return (Double256Vector) super.lanewiseTemplate(op, v);  // specialize
286     }
287 
288     @Override
289     @ForceInline
290     public Double256Vector lanewise(Binary op, Vector<Double> v, VectorMask<Double> m) {
291         return (Double256Vector) super.lanewiseTemplate(op, Double256Mask.class, v, (Double256Mask) m);  // specialize
292     }
293 
294 
295     /*package-private*/
296     @Override
297     @ForceInline
298     public final
299     Double256Vector
300     lanewise(Ternary op, Vector<Double> v1, Vector<Double> v2) {
301         return (Double256Vector) super.lanewiseTemplate(op, v1, v2);  // specialize
302     }
303 
304     @Override
305     @ForceInline
306     public final
307     Double256Vector
308     lanewise(Ternary op, Vector<Double> v1, Vector<Double> v2, VectorMask<Double> m) {
309         return (Double256Vector) super.lanewiseTemplate(op, Double256Mask.class, v1, v2, (Double256Mask) m);  // specialize
310     }
311 
312     @Override
313     @ForceInline
314     public final
315     Double256Vector addIndex(int scale) {
316         return (Double256Vector) super.addIndexTemplate(scale);  // specialize
317     }
318 
319     // Type specific horizontal reductions
320 
321     @Override
322     @ForceInline
323     public final double reduceLanes(VectorOperators.Associative op) {
324         return super.reduceLanesTemplate(op);  // specialized
325     }
326 
327     @Override
328     @ForceInline
329     public final double reduceLanes(VectorOperators.Associative op,
330                                     VectorMask<Double> m) {
331         return super.reduceLanesTemplate(op, Double256Mask.class, (Double256Mask) m);  // specialized
332     }
333 
334     @Override
335     @ForceInline
336     public final long reduceLanesToLong(VectorOperators.Associative op) {
337         return (long) super.reduceLanesTemplate(op);  // specialized
338     }
339 
340     @Override
341     @ForceInline
342     public final long reduceLanesToLong(VectorOperators.Associative op,
343                                         VectorMask<Double> m) {
344         return (long) super.reduceLanesTemplate(op, Double256Mask.class, (Double256Mask) m);  // specialized
345     }
346 
347     @ForceInline
348     public VectorShuffle<Double> toShuffle() {
349         return super.toShuffleTemplate(Double256Shuffle.class); // specialize
350     }
351 
352     // Specialized unary testing
353 
354     @Override
355     @ForceInline
356     public final Double256Mask test(Test op) {
357         return super.testTemplate(Double256Mask.class, op);  // specialize
358     }
359 
360     @Override
361     @ForceInline
362     public final Double256Mask test(Test op, VectorMask<Double> m) {
363         return super.testTemplate(Double256Mask.class, op, (Double256Mask) m);  // specialize
364     }
365 
366     // Specialized comparisons
367 
368     @Override
369     @ForceInline
370     public final Double256Mask compare(Comparison op, Vector<Double> v) {
371         return super.compareTemplate(Double256Mask.class, op, v);  // specialize
372     }
373 
374     @Override
375     @ForceInline
376     public final Double256Mask compare(Comparison op, double s) {
377         return super.compareTemplate(Double256Mask.class, op, s);  // specialize
378     }
379 
380     @Override
381     @ForceInline
382     public final Double256Mask compare(Comparison op, long s) {
383         return super.compareTemplate(Double256Mask.class, op, s);  // specialize
384     }
385 
386     @Override
387     @ForceInline
388     public final Double256Mask compare(Comparison op, Vector<Double> v, VectorMask<Double> m) {
389         return super.compareTemplate(Double256Mask.class, op, v, (Double256Mask) m);
390     }
391 
392 
393     @Override
394     @ForceInline
395     public Double256Vector blend(Vector<Double> v, VectorMask<Double> m) {
396         return (Double256Vector)
397             super.blendTemplate(Double256Mask.class,
398                                 (Double256Vector) v,
399                                 (Double256Mask) m);  // specialize
400     }
401 
402     @Override
403     @ForceInline
404     public Double256Vector slice(int origin, Vector<Double> v) {
405         return (Double256Vector) super.sliceTemplate(origin, v);  // specialize
406     }
407 
408     @Override
409     @ForceInline
410     public Double256Vector slice(int origin) {
411         return (Double256Vector) super.sliceTemplate(origin);  // specialize
412     }
413 
414     @Override
415     @ForceInline
416     public Double256Vector unslice(int origin, Vector<Double> w, int part) {
417         return (Double256Vector) super.unsliceTemplate(origin, w, part);  // specialize
418     }
419 
420     @Override
421     @ForceInline
422     public Double256Vector unslice(int origin, Vector<Double> w, int part, VectorMask<Double> m) {
423         return (Double256Vector)
424             super.unsliceTemplate(Double256Mask.class,
425                                   origin, w, part,
426                                   (Double256Mask) m);  // specialize
427     }
428 
429     @Override
430     @ForceInline
431     public Double256Vector unslice(int origin) {
432         return (Double256Vector) super.unsliceTemplate(origin);  // specialize
433     }
434 
435     @Override
436     @ForceInline
437     public Double256Vector rearrange(VectorShuffle<Double> s) {
438         return (Double256Vector)
439             super.rearrangeTemplate(Double256Shuffle.class,
440                                     (Double256Shuffle) s);  // specialize
441     }
442 
443     @Override
444     @ForceInline
445     public Double256Vector rearrange(VectorShuffle<Double> shuffle,
446                                   VectorMask<Double> m) {
447         return (Double256Vector)
448             super.rearrangeTemplate(Double256Shuffle.class,
449                                     Double256Mask.class,
450                                     (Double256Shuffle) shuffle,
451                                     (Double256Mask) m);  // specialize
452     }
453 
454     @Override
455     @ForceInline
456     public Double256Vector rearrange(VectorShuffle<Double> s,
457                                   Vector<Double> v) {
458         return (Double256Vector)
459             super.rearrangeTemplate(Double256Shuffle.class,
460                                     (Double256Shuffle) s,
461                                     (Double256Vector) v);  // specialize
462     }
463 
464     @Override
465     @ForceInline
466     public Double256Vector compress(VectorMask<Double> m) {
467         return (Double256Vector)
468             super.compressTemplate(Double256Mask.class,
469                                    (Double256Mask) m);  // specialize
470     }
471 
472     @Override
473     @ForceInline
474     public Double256Vector expand(VectorMask<Double> m) {
475         return (Double256Vector)
476             super.expandTemplate(Double256Mask.class,
477                                    (Double256Mask) m);  // specialize
478     }
479 
480     @Override
481     @ForceInline
482     public Double256Vector selectFrom(Vector<Double> v) {
483         return (Double256Vector)
484             super.selectFromTemplate((Double256Vector) v);  // specialize
485     }
486 
487     @Override
488     @ForceInline
489     public Double256Vector selectFrom(Vector<Double> v,
490                                    VectorMask<Double> m) {
491         return (Double256Vector)
492             super.selectFromTemplate((Double256Vector) v,
493                                      (Double256Mask) m);  // specialize
494     }
495 
496 
497     @ForceInline
498     @Override
499     public double lane(int i) {
500         long bits;
501         switch(i) {
502             case 0: bits = laneHelper(0); break;
503             case 1: bits = laneHelper(1); break;
504             case 2: bits = laneHelper(2); break;
505             case 3: bits = laneHelper(3); break;
506             default: throw new IllegalArgumentException("Index " + i + " must be zero or positive, and less than " + VLENGTH);
507         }
508         return Double.longBitsToDouble(bits);
509     }
510 
511     public long laneHelper(int i) {
512         return (long) VectorSupport.extract(
513                      VCLASS, ETYPE, VLENGTH,
514                      this, i,
515                      (vec, ix) -> {
516                      double[] vecarr = vec.vec();
517                      return (long)Double.doubleToLongBits(vecarr[ix]);
518                      });
519     }
520 
521     @ForceInline
522     @Override
523     public Double256Vector withLane(int i, double e) {
524         switch(i) {
525             case 0: return withLaneHelper(0, e);
526             case 1: return withLaneHelper(1, e);
527             case 2: return withLaneHelper(2, e);
528             case 3: return withLaneHelper(3, e);
529             default: throw new IllegalArgumentException("Index " + i + " must be zero or positive, and less than " + VLENGTH);
530         }
531     }
532 
533     public Double256Vector withLaneHelper(int i, double e) {
534         return VectorSupport.insert(
535                                 VCLASS, ETYPE, VLENGTH,
536                                 this, i, (long)Double.doubleToLongBits(e),
537                                 (v, ix, bits) -> {
538                                     double[] res = v.vec().clone();
539                                     res[ix] = Double.longBitsToDouble((long)bits);
540                                     return v.vectorFactory(res);
541                                 });
542     }
543 
544     // Mask
545 
546     static final class Double256Mask extends AbstractMask<Double> {
547         static final int VLENGTH = VSPECIES.laneCount();    // used by the JVM
548         static final Class<Double> ETYPE = double.class; // used by the JVM
549 
550         Double256Mask(boolean[] bits) {
551             this(bits, 0);
552         }
553 
554         Double256Mask(boolean[] bits, int offset) {
555             super(prepare(bits, offset));
556         }
557 
558         Double256Mask(boolean val) {
559             super(prepare(val));
560         }
561 
562         private static boolean[] prepare(boolean[] bits, int offset) {
563             boolean[] newBits = new boolean[VSPECIES.laneCount()];
564             for (int i = 0; i < newBits.length; i++) {
565                 newBits[i] = bits[offset + i];
566             }
567             return newBits;
568         }
569 
570         private static boolean[] prepare(boolean val) {
571             boolean[] bits = new boolean[VSPECIES.laneCount()];
572             Arrays.fill(bits, val);
573             return bits;
574         }
575 
576         @ForceInline
577         final @Override
578         public DoubleSpecies vspecies() {
579             // ISSUE:  This should probably be a @Stable
580             // field inside AbstractMask, rather than
581             // a megamorphic method.
582             return VSPECIES;
583         }
584 
585         @ForceInline
586         boolean[] getBits() {
587             return (boolean[])getPayload();
588         }
589 
590         @Override
591         Double256Mask uOp(MUnOp f) {
592             boolean[] res = new boolean[vspecies().laneCount()];
593             boolean[] bits = getBits();
594             for (int i = 0; i < res.length; i++) {
595                 res[i] = f.apply(i, bits[i]);
596             }
597             return new Double256Mask(res);
598         }
599 
600         @Override
601         Double256Mask bOp(VectorMask<Double> m, MBinOp f) {
602             boolean[] res = new boolean[vspecies().laneCount()];
603             boolean[] bits = getBits();
604             boolean[] mbits = ((Double256Mask)m).getBits();
605             for (int i = 0; i < res.length; i++) {
606                 res[i] = f.apply(i, bits[i], mbits[i]);
607             }
608             return new Double256Mask(res);
609         }
610 
611         @ForceInline
612         @Override
613         public final
614         Double256Vector toVector() {
615             return (Double256Vector) super.toVectorTemplate();  // specialize
616         }
617 
618         /**
619          * Helper function for lane-wise mask conversions.
620          * This function kicks in after intrinsic failure.
621          */
622         @ForceInline
623         private final <E>
624         VectorMask<E> defaultMaskCast(AbstractSpecies<E> dsp) {
625             if (length() != dsp.laneCount())
626                 throw new IllegalArgumentException("VectorMask length and species length differ");
627             boolean[] maskArray = toArray();
628             return  dsp.maskFactory(maskArray).check(dsp);
629         }
630 
631         @Override
632         @ForceInline
633         public <E> VectorMask<E> cast(VectorSpecies<E> dsp) {
634             AbstractSpecies<E> species = (AbstractSpecies<E>) dsp;
635             if (length() != species.laneCount())
636                 throw new IllegalArgumentException("VectorMask length and species length differ");
637 
638             return VectorSupport.convert(VectorSupport.VECTOR_OP_CAST,
639                 this.getClass(), ETYPE, VLENGTH,
640                 species.maskType(), species.elementType(), VLENGTH,
641                 this, species,
642                 (m, s) -> s.maskFactory(m.toArray()).check(s));
643         }
644 
645         @Override
646         @ForceInline
647         public Double256Mask eq(VectorMask<Double> mask) {
648             Objects.requireNonNull(mask);
649             Double256Mask m = (Double256Mask)mask;
650             return xor(m.not());
651         }
652 
653         // Unary operations
654 
655         @Override
656         @ForceInline
657         public Double256Mask not() {
658             return xor(maskAll(true));
659         }
660 
661         @Override
662         @ForceInline
663         public Double256Mask compress() {
664             return (Double256Mask)VectorSupport.comExpOp(VectorSupport.VECTOR_OP_MASK_COMPRESS,
665                 Double256Vector.class, Double256Mask.class, ETYPE, VLENGTH, null, this,
666                 (v1, m1) -> VSPECIES.iota().compare(VectorOperators.LT, m1.trueCount()));
667         }
668 
669 
670         // Binary operations
671 
672         @Override
673         @ForceInline
674         public Double256Mask and(VectorMask<Double> mask) {
675             Objects.requireNonNull(mask);
676             Double256Mask m = (Double256Mask)mask;
677             return VectorSupport.binaryOp(VECTOR_OP_AND, Double256Mask.class, null, long.class, VLENGTH,
678                                           this, m, null,
679                                           (m1, m2, vm) -> m1.bOp(m2, (i, a, b) -> a & b));
680         }
681 
682         @Override
683         @ForceInline
684         public Double256Mask or(VectorMask<Double> mask) {
685             Objects.requireNonNull(mask);
686             Double256Mask m = (Double256Mask)mask;
687             return VectorSupport.binaryOp(VECTOR_OP_OR, Double256Mask.class, null, long.class, VLENGTH,
688                                           this, m, null,
689                                           (m1, m2, vm) -> m1.bOp(m2, (i, a, b) -> a | b));
690         }
691 
692         @ForceInline
693         /* package-private */
694         Double256Mask xor(VectorMask<Double> mask) {
695             Objects.requireNonNull(mask);
696             Double256Mask m = (Double256Mask)mask;
697             return VectorSupport.binaryOp(VECTOR_OP_XOR, Double256Mask.class, null, long.class, VLENGTH,
698                                           this, m, null,
699                                           (m1, m2, vm) -> m1.bOp(m2, (i, a, b) -> a ^ b));
700         }
701 
702         // Mask Query operations
703 
704         @Override
705         @ForceInline
706         public int trueCount() {
707             return (int) VectorSupport.maskReductionCoerced(VECTOR_OP_MASK_TRUECOUNT, Double256Mask.class, long.class, VLENGTH, this,
708                                                       (m) -> trueCountHelper(m.getBits()));
709         }
710 
711         @Override
712         @ForceInline
713         public int firstTrue() {
714             return (int) VectorSupport.maskReductionCoerced(VECTOR_OP_MASK_FIRSTTRUE, Double256Mask.class, long.class, VLENGTH, this,
715                                                       (m) -> firstTrueHelper(m.getBits()));
716         }
717 
718         @Override
719         @ForceInline
720         public int lastTrue() {
721             return (int) VectorSupport.maskReductionCoerced(VECTOR_OP_MASK_LASTTRUE, Double256Mask.class, long.class, VLENGTH, this,
722                                                       (m) -> lastTrueHelper(m.getBits()));
723         }
724 
725         @Override
726         @ForceInline
727         public long toLong() {
728             if (length() > Long.SIZE) {
729                 throw new UnsupportedOperationException("too many lanes for one long");
730             }
731             return VectorSupport.maskReductionCoerced(VECTOR_OP_MASK_TOLONG, Double256Mask.class, long.class, VLENGTH, this,
732                                                       (m) -> toLongHelper(m.getBits()));
733         }
734 
735         // Reductions
736 
737         @Override
738         @ForceInline
739         public boolean anyTrue() {
740             return VectorSupport.test(BT_ne, Double256Mask.class, long.class, VLENGTH,
741                                          this, vspecies().maskAll(true),
742                                          (m, __) -> anyTrueHelper(((Double256Mask)m).getBits()));
743         }
744 
745         @Override
746         @ForceInline
747         public boolean allTrue() {
748             return VectorSupport.test(BT_overflow, Double256Mask.class, long.class, VLENGTH,
749                                          this, vspecies().maskAll(true),
750                                          (m, __) -> allTrueHelper(((Double256Mask)m).getBits()));
751         }
752 
753         @ForceInline
754         /*package-private*/
755         static Double256Mask maskAll(boolean bit) {
756             return VectorSupport.fromBitsCoerced(Double256Mask.class, long.class, VLENGTH,
757                                                  (bit ? -1 : 0), MODE_BROADCAST, null,
758                                                  (v, __) -> (v != 0 ? TRUE_MASK : FALSE_MASK));
759         }
760         private static final Double256Mask  TRUE_MASK = new Double256Mask(true);
761         private static final Double256Mask FALSE_MASK = new Double256Mask(false);
762 
763     }
764 
765     // Shuffle
766 
767     static final class Double256Shuffle extends AbstractShuffle<Double> {
768         static final int VLENGTH = VSPECIES.laneCount();    // used by the JVM
769         static final Class<Double> ETYPE = double.class; // used by the JVM
770 
771         Double256Shuffle(byte[] reorder) {
772             super(VLENGTH, reorder);
773         }
774 
775         public Double256Shuffle(int[] reorder) {
776             super(VLENGTH, reorder);
777         }
778 
779         public Double256Shuffle(int[] reorder, int i) {
780             super(VLENGTH, reorder, i);
781         }
782 
783         public Double256Shuffle(IntUnaryOperator fn) {
784             super(VLENGTH, fn);
785         }
786 
787         @Override
788         public DoubleSpecies vspecies() {
789             return VSPECIES;
790         }
791 
792         static {
793             // There must be enough bits in the shuffle lanes to encode
794             // VLENGTH valid indexes and VLENGTH exceptional ones.
795             assert(VLENGTH < Byte.MAX_VALUE);
796             assert(Byte.MIN_VALUE <= -VLENGTH);
797         }
798         static final Double256Shuffle IOTA = new Double256Shuffle(IDENTITY);
799 
800         @Override
801         @ForceInline
802         public Double256Vector toVector() {
803             return VectorSupport.shuffleToVector(VCLASS, ETYPE, Double256Shuffle.class, this, VLENGTH,
804                                                     (s) -> ((Double256Vector)(((AbstractShuffle<Double>)(s)).toVectorTemplate())));
805         }
806 
807         @Override
808         @ForceInline
809         public <F> VectorShuffle<F> cast(VectorSpecies<F> s) {
810             AbstractSpecies<F> species = (AbstractSpecies<F>) s;
811             if (length() != species.laneCount())
812                 throw new IllegalArgumentException("VectorShuffle length and species length differ");
813             int[] shuffleArray = toArray();
814             return s.shuffleFromArray(shuffleArray, 0).check(s);
815         }
816 
817         @ForceInline
818         @Override
819         public Double256Shuffle rearrange(VectorShuffle<Double> shuffle) {
820             Double256Shuffle s = (Double256Shuffle) shuffle;
821             byte[] reorder1 = reorder();
822             byte[] reorder2 = s.reorder();
823             byte[] r = new byte[reorder1.length];
824             for (int i = 0; i < reorder1.length; i++) {
825                 int ssi = reorder2[i];
826                 r[i] = reorder1[ssi];  // throws on exceptional index
827             }
828             return new Double256Shuffle(r);
829         }
830     }
831 
832     // ================================================
833 
834     // Specialized low-level memory operations.
835 
836     @ForceInline
837     @Override
838     final
839     DoubleVector fromArray0(double[] a, int offset) {
840         return super.fromArray0Template(a, offset);  // specialize
841     }
842 
843     @ForceInline
844     @Override
845     final
846     DoubleVector fromArray0(double[] a, int offset, VectorMask<Double> m) {
847         return super.fromArray0Template(Double256Mask.class, a, offset, (Double256Mask) m);  // specialize
848     }
849 
850     @ForceInline
851     @Override
852     final
853     DoubleVector fromArray0(double[] a, int offset, int[] indexMap, int mapOffset, VectorMask<Double> m) {
854         return super.fromArray0Template(Double256Mask.class, a, offset, indexMap, mapOffset, (Double256Mask) m);
855     }
856 
857 
858 
859     @ForceInline
860     @Override
861     final
862     DoubleVector fromMemorySegment0(MemorySegment ms, long offset) {
863         return super.fromMemorySegment0Template(ms, offset);  // specialize
864     }
865 
866     @ForceInline
867     @Override
868     final
869     DoubleVector fromMemorySegment0(MemorySegment ms, long offset, VectorMask<Double> m) {
870         return super.fromMemorySegment0Template(Double256Mask.class, ms, offset, (Double256Mask) m);  // specialize
871     }
872 
873     @ForceInline
874     @Override
875     final
876     void intoArray0(double[] a, int offset) {
877         super.intoArray0Template(a, offset);  // specialize
878     }
879 
880     @ForceInline
881     @Override
882     final
883     void intoArray0(double[] a, int offset, VectorMask<Double> m) {
884         super.intoArray0Template(Double256Mask.class, a, offset, (Double256Mask) m);
885     }
886 
887     @ForceInline
888     @Override
889     final
890     void intoArray0(double[] a, int offset, int[] indexMap, int mapOffset, VectorMask<Double> m) {
891         super.intoArray0Template(Double256Mask.class, a, offset, indexMap, mapOffset, (Double256Mask) m);
892     }
893 
894 
895     @ForceInline
896     @Override
897     final
898     void intoMemorySegment0(MemorySegment ms, long offset, VectorMask<Double> m) {
899         super.intoMemorySegment0Template(Double256Mask.class, ms, offset, (Double256Mask) m);
900     }
901 
902 
903     // End of specialized low-level memory operations.
904 
905     // ================================================
906 
907 }