1 /*
 2  * Copyright (c) 2024, 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 squares;
26 
27 import hat.Accelerator;
28 import hat.Accelerator.Compute;
29 import hat.ComputeContext;
30 import hat.NDRange;
31 import static hat.KernelContext.*;
32 import hat.backend.Backend;
33 import hat.buffer.S32Array;
34 
35 import jdk.incubator.code.Reflect;
36 
37 import java.lang.invoke.MethodHandles;
38 
39 public class Main {
40     @Reflect
41     public static int squareit(int v) {
42         return  v * v;
43 
44     }
45 
46     @Reflect
47     public static void squareKernel( S32Array s32Array) {
48         if (GIX() < GSX()){
49            int value = s32Array.array(GIX());       // arr[cc.x]
50            s32Array.array(GIX(), squareit(value));  // arr[cc.x]=value*value
51         }
52     }
53 
54     @Reflect
55     public static void square(ComputeContext cc, S32Array s32Array) {
56         cc.dispatchKernel(NDRange.of1D(s32Array.length()), () -> squareKernel( s32Array));
57     }
58 
59     static void main(String[] args) {
60         var accelerator = new Accelerator(MethodHandles.lookup(), Backend.FIRST);//new JavaMultiThreadedBackend());
61         var arr = S32Array.create(accelerator, 32);
62         for (int i = 0; i < arr.length(); i++) {
63             arr.array(i, i);
64         }
65         accelerator.compute((@Reflect Compute)
66                 cc -> Main.square(cc, arr)
67         );
68         for (int i = 0; i < arr.length(); i++) {
69             System.out.println(i + " " + arr.array(i));
70         }
71     }
72 }