1 /*
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23 
24 /**
25 * @test
26 * @summary Test vectorization of popcount for Long
27 * @requires vm.compiler2.enabled
28 * @requires vm.cpu.features ~= ".*avx512bw.*"
29 * @requires os.arch=="x86" | os.arch=="i386" | os.arch=="amd64" | os.arch=="x86_64"
30 * @library /test/lib /
31 * @run driver compiler.vectorization.TestPopCountVectorLong
32 */
33 
34 package compiler.vectorization;
35 import compiler.lib.ir_framework.*;
36 import java.util.Random;
37 
38 
39 public class TestPopCountVectorLong {
40     private long[] input;
41     private int[] output;
42     private static final int LEN = 1024;
43     private Random rng;
44 
45     public static void main(String args[]) {
46         TestFramework.run(TestPopCountVectorLong.class);
47     }
48 
49     public TestPopCountVectorLong() {
50         input = new long[LEN];
51         output = new int[LEN];
52         rng = new Random(42);
53         for (int i = 0; i < LEN; ++i) {
54             input[i] = rng.nextLong();
55         }
56     }
57 
58     @Test // needs to be run in (fast) debug mode
59     @Warmup(10000)
60     @IR(counts = {"PopCountVL", ">= 1"}) // Atleast one PopCountVL node is generated if vectorization is successful
61     public void vectorizeBitCount() {
62         for (int i = 0; i < LEN; ++i) {
63             output[i] = Long.bitCount(input[i]);
64         }
65         checkResult();
66     }
67 
68     public void checkResult() {
69         for (int i = 0; i < LEN; ++i) {
70             int expected = Long.bitCount(input[i]);
71             if (output[i] != expected) {
72                 throw new RuntimeException("Invalid result: output[" + i + "] = " + output[i] + " != " + expected);
73             }
74         }
75     }
76 }
77