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 Int256Vector extends IntVector {
 43     static final IntSpecies VSPECIES =
 44         (IntSpecies) IntVector.SPECIES_256;
 45 
 46     static final VectorShape VSHAPE =
 47         VSPECIES.vectorShape();
 48 
 49     static final Class<Int256Vector> VCLASS = Int256Vector.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<Integer> ETYPE = int.class; // used by the JVM
 56 
 57     Int256Vector(int[] v) {
 58         super(v);
 59     }
 60 
 61     // For compatibility as Int256Vector::new,
 62     // stored into species.vectorFactory.
 63     Int256Vector(Object v) {
 64         this((int[]) v);
 65     }
 66 
 67     static final Int256Vector ZERO = new Int256Vector(new int[VLENGTH]);
 68     static final Int256Vector IOTA = new Int256Vector(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 IntSpecies 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<Integer> elementType() { return int.class; }
 92 
 93     @ForceInline
 94     @Override
 95     public final int elementSize() { return Integer.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     int[] vec() {
117         return (int[])getPayload();
118     }
119 
120     // Virtualized constructors
121 
122     @Override
123     @ForceInline
124     public final Int256Vector broadcast(int e) {
125         return (Int256Vector) super.broadcastTemplate(e);  // specialize
126     }
127 
128     @Override
129     @ForceInline
130     public final Int256Vector broadcast(long e) {
131         return (Int256Vector) super.broadcastTemplate(e);  // specialize
132     }
133 
134     @Override
135     @ForceInline
136     Int256Mask maskFromArray(boolean[] bits) {
137         return new Int256Mask(bits);
138     }
139 
140     @Override
141     @ForceInline
142     Int256Shuffle iotaShuffle() { return Int256Shuffle.IOTA; }
143 
144     @ForceInline
145     Int256Shuffle iotaShuffle(int start, int step, boolean wrap) {
146       if (wrap) {
147         return (Int256Shuffle)VectorSupport.shuffleIota(ETYPE, Int256Shuffle.class, VSPECIES, VLENGTH, start, step, 1,
148                 (l, lstart, lstep, s) -> s.shuffleFromOp(i -> (VectorIntrinsics.wrapToRange(i*lstep + lstart, l))));
149       } else {
150         return (Int256Shuffle)VectorSupport.shuffleIota(ETYPE, Int256Shuffle.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     Int256Shuffle shuffleFromBytes(byte[] reorder) { return new Int256Shuffle(reorder); }
158 
159     @Override
160     @ForceInline
161     Int256Shuffle shuffleFromArray(int[] indexes, int i) { return new Int256Shuffle(indexes, i); }
162 
163     @Override
164     @ForceInline
165     Int256Shuffle shuffleFromOp(IntUnaryOperator fn) { return new Int256Shuffle(fn); }
166 
167     // Make a vector of the same species but the given elements:
168     @ForceInline
169     final @Override
170     Int256Vector vectorFactory(int[] vec) {
171         return new Int256Vector(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     Int256Vector uOp(FUnOp f) {
191         return (Int256Vector) super.uOpTemplate(f);  // specialize
192     }
193 
194     @ForceInline
195     final @Override
196     Int256Vector uOp(VectorMask<Integer> m, FUnOp f) {
197         return (Int256Vector)
198             super.uOpTemplate((Int256Mask)m, f);  // specialize
199     }
200 
201     // Binary operator
202 
203     @ForceInline
204     final @Override
205     Int256Vector bOp(Vector<Integer> v, FBinOp f) {
206         return (Int256Vector) super.bOpTemplate((Int256Vector)v, f);  // specialize
207     }
208 
209     @ForceInline
210     final @Override
211     Int256Vector bOp(Vector<Integer> v,
212                      VectorMask<Integer> m, FBinOp f) {
213         return (Int256Vector)
214             super.bOpTemplate((Int256Vector)v, (Int256Mask)m,
215                               f);  // specialize
216     }
217 
218     // Ternary operator
219 
220     @ForceInline
221     final @Override
222     Int256Vector tOp(Vector<Integer> v1, Vector<Integer> v2, FTriOp f) {
223         return (Int256Vector)
224             super.tOpTemplate((Int256Vector)v1, (Int256Vector)v2,
225                               f);  // specialize
226     }
227 
228     @ForceInline
229     final @Override
230     Int256Vector tOp(Vector<Integer> v1, Vector<Integer> v2,
231                      VectorMask<Integer> m, FTriOp f) {
232         return (Int256Vector)
233             super.tOpTemplate((Int256Vector)v1, (Int256Vector)v2,
234                               (Int256Mask)m, f);  // specialize
235     }
236 
237     @ForceInline
238     final @Override
239     int rOp(int 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<Integer,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 Int256Vector lanewise(Unary op) {
273         return (Int256Vector) super.lanewiseTemplate(op);  // specialize
274     }
275 
276     @Override
277     @ForceInline
278     public Int256Vector lanewise(Binary op, Vector<Integer> v) {
279         return (Int256Vector) super.lanewiseTemplate(op, v);  // specialize
280     }
281 
282     /*package-private*/
283     @Override
284     @ForceInline Int256Vector
285     lanewiseShift(VectorOperators.Binary op, int e) {
286         return (Int256Vector) super.lanewiseShiftTemplate(op, e);  // specialize
287     }
288 
289     /*package-private*/
290     @Override
291     @ForceInline
292     public final
293     Int256Vector
294     lanewise(VectorOperators.Ternary op, Vector<Integer> v1, Vector<Integer> v2) {
295         return (Int256Vector) super.lanewiseTemplate(op, v1, v2);  // specialize
296     }
297 
298     @Override
299     @ForceInline
300     public final
301     Int256Vector addIndex(int scale) {
302         return (Int256Vector) super.addIndexTemplate(scale);  // specialize
303     }
304 
305     // Type specific horizontal reductions
306 
307     @Override
308     @ForceInline
309     public final int reduceLanes(VectorOperators.Associative op) {
310         return super.reduceLanesTemplate(op);  // specialized
311     }
312 
313     @Override
314     @ForceInline
315     public final int reduceLanes(VectorOperators.Associative op,
316                                     VectorMask<Integer> m) {
317         return super.reduceLanesTemplate(op, m);  // specialized
318     }
319 
320     @Override
321     @ForceInline
322     public final long reduceLanesToLong(VectorOperators.Associative op) {
323         return (long) super.reduceLanesTemplate(op);  // specialized
324     }
325 
326     @Override
327     @ForceInline
328     public final long reduceLanesToLong(VectorOperators.Associative op,
329                                         VectorMask<Integer> m) {
330         return (long) super.reduceLanesTemplate(op, m);  // specialized
331     }
332 
333     @ForceInline
334     public VectorShuffle<Integer> toShuffle() {
335         return super.toShuffleTemplate(Int256Shuffle.class); // specialize
336     }
337 
338     // Specialized unary testing
339 
340     @Override
341     @ForceInline
342     public final Int256Mask test(Test op) {
343         return super.testTemplate(Int256Mask.class, op);  // specialize
344     }
345 
346     // Specialized comparisons
347 
348     @Override
349     @ForceInline
350     public final Int256Mask compare(Comparison op, Vector<Integer> v) {
351         return super.compareTemplate(Int256Mask.class, op, v);  // specialize
352     }
353 
354     @Override
355     @ForceInline
356     public final Int256Mask compare(Comparison op, int s) {
357         return super.compareTemplate(Int256Mask.class, op, s);  // specialize
358     }
359 
360     @Override
361     @ForceInline
362     public final Int256Mask compare(Comparison op, long s) {
363         return super.compareTemplate(Int256Mask.class, op, s);  // specialize
364     }
365 
366     @Override
367     @ForceInline
368     public Int256Vector blend(Vector<Integer> v, VectorMask<Integer> m) {
369         return (Int256Vector)
370             super.blendTemplate(Int256Mask.class,
371                                 (Int256Vector) v,
372                                 (Int256Mask) m);  // specialize
373     }
374 
375     @Override
376     @ForceInline
377     public Int256Vector slice(int origin, Vector<Integer> v) {
378         return (Int256Vector) super.sliceTemplate(origin, v);  // specialize
379     }
380 
381     @Override
382     @ForceInline
383     public Int256Vector slice(int origin) {
384         return (Int256Vector) super.sliceTemplate(origin);  // specialize
385     }
386 
387     @Override
388     @ForceInline
389     public Int256Vector unslice(int origin, Vector<Integer> w, int part) {
390         return (Int256Vector) super.unsliceTemplate(origin, w, part);  // specialize
391     }
392 
393     @Override
394     @ForceInline
395     public Int256Vector unslice(int origin, Vector<Integer> w, int part, VectorMask<Integer> m) {
396         return (Int256Vector)
397             super.unsliceTemplate(Int256Mask.class,
398                                   origin, w, part,
399                                   (Int256Mask) m);  // specialize
400     }
401 
402     @Override
403     @ForceInline
404     public Int256Vector unslice(int origin) {
405         return (Int256Vector) super.unsliceTemplate(origin);  // specialize
406     }
407 
408     @Override
409     @ForceInline
410     public Int256Vector rearrange(VectorShuffle<Integer> s) {
411         return (Int256Vector)
412             super.rearrangeTemplate(Int256Shuffle.class,
413                                     (Int256Shuffle) s);  // specialize
414     }
415 
416     @Override
417     @ForceInline
418     public Int256Vector rearrange(VectorShuffle<Integer> shuffle,
419                                   VectorMask<Integer> m) {
420         return (Int256Vector)
421             super.rearrangeTemplate(Int256Shuffle.class,
422                                     (Int256Shuffle) shuffle,
423                                     (Int256Mask) m);  // specialize
424     }
425 
426     @Override
427     @ForceInline
428     public Int256Vector rearrange(VectorShuffle<Integer> s,
429                                   Vector<Integer> v) {
430         return (Int256Vector)
431             super.rearrangeTemplate(Int256Shuffle.class,
432                                     (Int256Shuffle) s,
433                                     (Int256Vector) v);  // specialize
434     }
435 
436     @Override
437     @ForceInline
438     public Int256Vector selectFrom(Vector<Integer> v) {
439         return (Int256Vector)
440             super.selectFromTemplate((Int256Vector) v);  // specialize
441     }
442 
443     @Override
444     @ForceInline
445     public Int256Vector selectFrom(Vector<Integer> v,
446                                    VectorMask<Integer> m) {
447         return (Int256Vector)
448             super.selectFromTemplate((Int256Vector) v,
449                                      (Int256Mask) m);  // specialize
450     }
451 
452 
453     @ForceInline
454     @Override
455     public int lane(int i) {
456         switch(i) {
457             case 0: return laneHelper(0);
458             case 1: return laneHelper(1);
459             case 2: return laneHelper(2);
460             case 3: return laneHelper(3);
461             case 4: return laneHelper(4);
462             case 5: return laneHelper(5);
463             case 6: return laneHelper(6);
464             case 7: return laneHelper(7);
465             default: throw new IllegalArgumentException("Index " + i + " must be zero or positive, and less than " + VLENGTH);
466         }
467     }
468 
469     public int laneHelper(int i) {
470         return (int) VectorSupport.extract(
471                                 VCLASS, ETYPE, VLENGTH,
472                                 this, i,
473                                 (vec, ix) -> {
474                                     int[] vecarr = vec.vec();
475                                     return (long)vecarr[ix];
476                                 });
477     }
478 
479     @ForceInline
480     @Override
481     public Int256Vector withLane(int i, int e) {
482         switch (i) {
483             case 0: return withLaneHelper(0, e);
484             case 1: return withLaneHelper(1, e);
485             case 2: return withLaneHelper(2, e);
486             case 3: return withLaneHelper(3, e);
487             case 4: return withLaneHelper(4, e);
488             case 5: return withLaneHelper(5, e);
489             case 6: return withLaneHelper(6, e);
490             case 7: return withLaneHelper(7, e);
491             default: throw new IllegalArgumentException("Index " + i + " must be zero or positive, and less than " + VLENGTH);
492         }
493     }
494 
495     public Int256Vector withLaneHelper(int i, int e) {
496         return VectorSupport.insert(
497                                 VCLASS, ETYPE, VLENGTH,
498                                 this, i, (long)e,
499                                 (v, ix, bits) -> {
500                                     int[] res = v.vec().clone();
501                                     res[ix] = (int)bits;
502                                     return v.vectorFactory(res);
503                                 });
504     }
505 
506     // Mask
507 
508     static final class Int256Mask extends AbstractMask<Integer> {
509         static final int VLENGTH = VSPECIES.laneCount();    // used by the JVM
510         static final Class<Integer> ETYPE = int.class; // used by the JVM
511 
512         Int256Mask(boolean[] bits) {
513             this(bits, 0);
514         }
515 
516         Int256Mask(boolean[] bits, int offset) {
517             super(prepare(bits, offset));
518         }
519 
520         Int256Mask(boolean val) {
521             super(prepare(val));
522         }
523 
524         private static boolean[] prepare(boolean[] bits, int offset) {
525             boolean[] newBits = new boolean[VSPECIES.laneCount()];
526             for (int i = 0; i < newBits.length; i++) {
527                 newBits[i] = bits[offset + i];
528             }
529             return newBits;
530         }
531 
532         private static boolean[] prepare(boolean val) {
533             boolean[] bits = new boolean[VSPECIES.laneCount()];
534             Arrays.fill(bits, val);
535             return bits;
536         }
537 
538         @ForceInline
539         final @Override
540         public IntSpecies vspecies() {
541             // ISSUE:  This should probably be a @Stable
542             // field inside AbstractMask, rather than
543             // a megamorphic method.
544             return VSPECIES;
545         }
546 
547         @ForceInline
548         boolean[] getBits() {
549             return (boolean[])getPayload();
550         }
551 
552         @Override
553         Int256Mask uOp(MUnOp f) {
554             boolean[] res = new boolean[vspecies().laneCount()];
555             boolean[] bits = getBits();
556             for (int i = 0; i < res.length; i++) {
557                 res[i] = f.apply(i, bits[i]);
558             }
559             return new Int256Mask(res);
560         }
561 
562         @Override
563         Int256Mask bOp(VectorMask<Integer> m, MBinOp f) {
564             boolean[] res = new boolean[vspecies().laneCount()];
565             boolean[] bits = getBits();
566             boolean[] mbits = ((Int256Mask)m).getBits();
567             for (int i = 0; i < res.length; i++) {
568                 res[i] = f.apply(i, bits[i], mbits[i]);
569             }
570             return new Int256Mask(res);
571         }
572 
573         @ForceInline
574         @Override
575         public final
576         Int256Vector toVector() {
577             return (Int256Vector) super.toVectorTemplate();  // specialize
578         }
579 
580         /**
581          * Helper function for lane-wise mask conversions.
582          * This function kicks in after intrinsic failure.
583          */
584         @ForceInline
585         private final <E>
586         VectorMask<E> defaultMaskCast(AbstractSpecies<E> dsp) {
587             if (length() != dsp.laneCount())
588                 throw new IllegalArgumentException("VectorMask length and species length differ");
589             boolean[] maskArray = toArray();
590             return  dsp.maskFactory(maskArray).check(dsp);
591         }
592 
593         @Override
594         @ForceInline
595         public <E> VectorMask<E> cast(VectorSpecies<E> dsp) {
596             AbstractSpecies<E> species = (AbstractSpecies<E>) dsp;
597             if (length() != species.laneCount())
598                 throw new IllegalArgumentException("VectorMask length and species length differ");
599             if (VSIZE == species.vectorBitSize()) {
600                 Class<?> dtype = species.elementType();
601                 Class<?> dmtype = species.maskType();
602                 return VectorSupport.convert(VectorSupport.VECTOR_OP_REINTERPRET,
603                     this.getClass(), ETYPE, VLENGTH,
604                     dmtype, dtype, VLENGTH,
605                     this, species,
606                     Int256Mask::defaultMaskCast);
607             }
608             return this.defaultMaskCast(species);
609         }
610 
611         @Override
612         @ForceInline
613         public Int256Mask eq(VectorMask<Integer> mask) {
614             Objects.requireNonNull(mask);
615             Int256Mask m = (Int256Mask)mask;
616             return xor(m.not());
617         }
618 
619         // Unary operations
620 
621         @Override
622         @ForceInline
623         public Int256Mask not() {
624             return xor(maskAll(true));
625         }
626 
627         // Binary operations
628 
629         @Override
630         @ForceInline
631         public Int256Mask and(VectorMask<Integer> mask) {
632             Objects.requireNonNull(mask);
633             Int256Mask m = (Int256Mask)mask;
634             return VectorSupport.binaryOp(VECTOR_OP_AND, Int256Mask.class, int.class, VLENGTH,
635                                              this, m,
636                                              (m1, m2) -> m1.bOp(m2, (i, a, b) -> a & b));
637         }
638 
639         @Override
640         @ForceInline
641         public Int256Mask or(VectorMask<Integer> mask) {
642             Objects.requireNonNull(mask);
643             Int256Mask m = (Int256Mask)mask;
644             return VectorSupport.binaryOp(VECTOR_OP_OR, Int256Mask.class, int.class, VLENGTH,
645                                              this, m,
646                                              (m1, m2) -> m1.bOp(m2, (i, a, b) -> a | b));
647         }
648 
649         @ForceInline
650         /* package-private */
651         Int256Mask xor(VectorMask<Integer> mask) {
652             Objects.requireNonNull(mask);
653             Int256Mask m = (Int256Mask)mask;
654             return VectorSupport.binaryOp(VECTOR_OP_XOR, Int256Mask.class, int.class, VLENGTH,
655                                           this, m,
656                                           (m1, m2) -> m1.bOp(m2, (i, a, b) -> a ^ b));
657         }
658 
659         // Mask Query operations
660 
661         @Override
662         @ForceInline
663         public int trueCount() {
664             return VectorSupport.maskReductionCoerced(VECTOR_OP_MASK_TRUECOUNT, Int256Mask.class, int.class, VLENGTH, this,
665                                                       (m) -> trueCountHelper(((Int256Mask)m).getBits()));
666         }
667 
668         @Override
669         @ForceInline
670         public int firstTrue() {
671             return VectorSupport.maskReductionCoerced(VECTOR_OP_MASK_FIRSTTRUE, Int256Mask.class, int.class, VLENGTH, this,
672                                                       (m) -> firstTrueHelper(((Int256Mask)m).getBits()));
673         }
674 
675         @Override
676         @ForceInline
677         public int lastTrue() {
678             return VectorSupport.maskReductionCoerced(VECTOR_OP_MASK_LASTTRUE, Int256Mask.class, int.class, VLENGTH, this,
679                                                       (m) -> lastTrueHelper(((Int256Mask)m).getBits()));
680         }
681 
682         // Reductions
683 
684         @Override
685         @ForceInline
686         public boolean anyTrue() {
687             return VectorSupport.test(BT_ne, Int256Mask.class, int.class, VLENGTH,
688                                          this, vspecies().maskAll(true),
689                                          (m, __) -> anyTrueHelper(((Int256Mask)m).getBits()));
690         }
691 
692         @Override
693         @ForceInline
694         public boolean allTrue() {
695             return VectorSupport.test(BT_overflow, Int256Mask.class, int.class, VLENGTH,
696                                          this, vspecies().maskAll(true),
697                                          (m, __) -> allTrueHelper(((Int256Mask)m).getBits()));
698         }
699 
700         @ForceInline
701         /*package-private*/
702         static Int256Mask maskAll(boolean bit) {
703             return VectorSupport.broadcastCoerced(Int256Mask.class, int.class, VLENGTH,
704                                                   (bit ? -1 : 0), null,
705                                                   (v, __) -> (v != 0 ? TRUE_MASK : FALSE_MASK));
706         }
707         private static final Int256Mask  TRUE_MASK = new Int256Mask(true);
708         private static final Int256Mask FALSE_MASK = new Int256Mask(false);
709 
710     }
711 
712     // Shuffle
713 
714     static final class Int256Shuffle extends AbstractShuffle<Integer> {
715         static final int VLENGTH = VSPECIES.laneCount();    // used by the JVM
716         static final Class<Integer> ETYPE = int.class; // used by the JVM
717 
718         Int256Shuffle(byte[] reorder) {
719             super(VLENGTH, reorder);
720         }
721 
722         public Int256Shuffle(int[] reorder) {
723             super(VLENGTH, reorder);
724         }
725 
726         public Int256Shuffle(int[] reorder, int i) {
727             super(VLENGTH, reorder, i);
728         }
729 
730         public Int256Shuffle(IntUnaryOperator fn) {
731             super(VLENGTH, fn);
732         }
733 
734         @Override
735         public IntSpecies vspecies() {
736             return VSPECIES;
737         }
738 
739         static {
740             // There must be enough bits in the shuffle lanes to encode
741             // VLENGTH valid indexes and VLENGTH exceptional ones.
742             assert(VLENGTH < Byte.MAX_VALUE);
743             assert(Byte.MIN_VALUE <= -VLENGTH);
744         }
745         static final Int256Shuffle IOTA = new Int256Shuffle(IDENTITY);
746 
747         @Override
748         @ForceInline
749         public Int256Vector toVector() {
750             return VectorSupport.shuffleToVector(VCLASS, ETYPE, Int256Shuffle.class, this, VLENGTH,
751                                                     (s) -> ((Int256Vector)(((AbstractShuffle<Integer>)(s)).toVectorTemplate())));
752         }
753 
754         @Override
755         @ForceInline
756         public <F> VectorShuffle<F> cast(VectorSpecies<F> s) {
757             AbstractSpecies<F> species = (AbstractSpecies<F>) s;
758             if (length() != species.laneCount())
759                 throw new IllegalArgumentException("VectorShuffle length and species length differ");
760             int[] shuffleArray = toArray();
761             return s.shuffleFromArray(shuffleArray, 0).check(s);
762         }
763 
764         @ForceInline
765         @Override
766         public Int256Shuffle rearrange(VectorShuffle<Integer> shuffle) {
767             Int256Shuffle s = (Int256Shuffle) shuffle;
768             byte[] reorder1 = reorder();
769             byte[] reorder2 = s.reorder();
770             byte[] r = new byte[reorder1.length];
771             for (int i = 0; i < reorder1.length; i++) {
772                 int ssi = reorder2[i];
773                 r[i] = reorder1[ssi];  // throws on exceptional index
774             }
775             return new Int256Shuffle(r);
776         }
777     }
778 
779     // ================================================
780 
781     // Specialized low-level memory operations.
782 
783     @ForceInline
784     @Override
785     final
786     IntVector fromArray0(int[] a, int offset) {
787         return super.fromArray0Template(a, offset);  // specialize
788     }
789 
790 
791 
792     @ForceInline
793     @Override
794     final
795     IntVector fromByteArray0(byte[] a, int offset) {
796         return super.fromByteArray0Template(a, offset);  // specialize
797     }
798 
799     @ForceInline
800     @Override
801     final
802     IntVector fromByteBuffer0(ByteBuffer bb, int offset) {
803         return super.fromByteBuffer0Template(bb, offset);  // specialize
804     }
805 
806     @ForceInline
807     @Override
808     final
809     void intoArray0(int[] a, int offset) {
810         super.intoArray0Template(a, offset);  // specialize
811     }
812 
813     @ForceInline
814     @Override
815     final
816     void intoByteArray0(byte[] a, int offset) {
817         super.intoByteArray0Template(a, offset);  // specialize
818     }
819 
820     // End of specialized low-level memory operations.
821 
822     // ================================================
823 
824 }