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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/**
 * @test
 * @bug 8282711 8290249
 * @summary Accelerate Math.signum function for AVX, AVX512, aarch64 (Neon and SVE)
 *          and riscv64 (vector)
 * @requires vm.compiler2.enabled
 * @requires (os.simpleArch == "x64" & vm.cpu.features ~= ".*avx.*") | os.arch == "aarch64" |
 *           (os.arch == "riscv64" & vm.cpu.features ~= ".*rvv.*")
 * @library /test/lib /
 * @run driver compiler.vectorization.TestSignumVector
 */

package compiler.vectorization;

import java.util.Random;

import compiler.lib.ir_framework.*;

public class TestSignumVector {
  private static final int ARRLEN = 1024;
  private static final int ITERS  = 11000;

  private static double [] dinp;
  private static double [] dout;
  private static float  [] finp;
  private static float  [] fout;

  public static void main(String args[]) {
      TestFramework.runWithFlags("-XX:-TieredCompilation", "-XX:+UnlockDiagnosticVMOptions",
                                 "-XX:+UseSignumIntrinsic", "-XX:CompileThresholdScaling=0.3");
      System.out.println("PASSED");
  }

  @Test
  @IR(counts = {IRNode.SIGNUM_VD, "> 0"})
  public void test_signum_double(double[] dout, double[] dinp) {
      for (int i = 0; i < dout.length; i+=1) {
          dout[i] = Math.signum(dinp[i]);
      }
  }

  @Run(test = {"test_signum_double"}, mode = RunMode.STANDALONE)
  public void kernel_test_signum_double() {
      dinp = new double[ARRLEN];
      dout = new double[ARRLEN];
      Random rnd = new Random(20);
      for(int i = 0 ; i < ARRLEN; i++) {
          dinp[i] = (i-ARRLEN/2)*rnd.nextDouble();
      }
      for (int i = 0; i < ITERS; i++) {
          test_signum_double(dout , dinp);
      }
      for(int i = 0 ; i < ARRLEN; i++) {
        if (i-ARRLEN/2<0) {
            if (dout[i] != -1.0)  throw new RuntimeException("Expected negative numbers in first half of array: " + java.util.Arrays.toString(dout));
        } else if (i-ARRLEN/2==0) {
            if (dout[i] != 0)     throw new RuntimeException("Expected zero in the middle of array: " + java.util.Arrays.toString(dout));
        } else {
            if (dout[i] != 1.0)   throw new RuntimeException("Expected positive numbers in second half of array: " + java.util.Arrays.toString(dout));
        }
    }
  }

  @Test
  @IR(counts = {IRNode.SIGNUM_VF, "> 0"})
  public void test_signum_float(float[] fout, float[] finp) {
      for (int i = 0; i < finp.length; i+=1) {
          fout[i] = Math.signum(finp[i]);
      }
  }

  @Run(test = {"test_signum_float"}, mode = RunMode.STANDALONE)
  public void kernel_test_round() {
      finp = new float[ARRLEN];
      fout = new float[ARRLEN];
      Random rnd = new Random(20);
      for(int i = 0 ; i < ARRLEN; i++) {
          finp[i] = (i-ARRLEN/2)*rnd.nextFloat();
      }
      for (int i = 0; i < ITERS; i++) {
          test_signum_float(fout , finp);
      }
      for(int i = 0 ; i < ARRLEN; i++) {
        if (i-ARRLEN/2<0) {
            if (fout[i] != -1.0)  throw new RuntimeException("Expected negative numbers in first half of array: " + java.util.Arrays.toString(fout));
        } else if (i-ARRLEN/2==0) {
            if (fout[i] != 0)     throw new RuntimeException("Expected zero in the middle of array: " + java.util.Arrays.toString(fout));
        } else {
            if (fout[i] != 1.0)   throw new RuntimeException("Expected positive numbers in second half of array: " + java.util.Arrays.toString(fout));
        }
    }
  }
}