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/**
* @test
* @bug 8332119
* @summary Incorrect IllegalArgumentException for C2 compiled permute kernel
* @modules jdk.incubator.vector
* @library /test/lib /
* @run main/othervm -XX:+UnlockDiagnosticVMOptions -Xbatch -XX:-TieredCompilation -XX:CompileOnly=TestTwoVectorPermute::micro compiler.vectorapi.TestTwoVectorPermute
* @run main/othervm -XX:+UnlockDiagnosticVMOptions -Xbatch -XX:-TieredCompilation compiler.vectorapi.TestTwoVectorPermute
* @run main/othervm -XX:+UnlockDiagnosticVMOptions -Xbatch -XX:TieredStopAtLevel=3 compiler.vectorapi.TestTwoVectorPermute
*/
package compiler.vectorapi;


import jdk.incubator.vector.*;
import java.util.Arrays;
import java.util.Random;

public class TestTwoVectorPermute {
   public static final VectorSpecies<Float> FSP = FloatVector.SPECIES_256;

   public static void validate(float[] res, float[] shuf, float[] src1, float[] src2) {
       for (int i = 0; i < res.length; i++) {
           float expected = Float.NaN;
           int shuf_index = (int)shuf[i];
           // Exceptional index.
           if (shuf_index < 0 || shuf_index >= FSP.length()) {
               int wrapped_index = (shuf_index & (FSP.length() - 1));
               if (Integer.compareUnsigned(shuf_index, FSP.length()) > 0) {
                   wrapped_index -= FSP.length();
               }
               wrapped_index = wrapped_index < 0 ? wrapped_index + FSP.length() : wrapped_index;
               expected = src2[wrapped_index];
           } else {
               expected = src1[shuf_index];
           }
           if (res[i] != expected) {
              throw new AssertionError("Result mismatch at " + i + " index, (actual = " + res[i] + ") != ( expected " +   expected + " )");
           }
       }
   }

   public static void micro(float[] res, float[] shuf, float[] src1, float[] src2) {
       VectorShuffle<Float> vshuf = FloatVector.fromArray(FSP, shuf, 0).toShuffle();
       VectorShuffle<Float> vshuf_wrapped = vshuf.wrapIndexes();
       FloatVector.fromArray(FSP, src1, 0)
         .rearrange(vshuf_wrapped)
         .blend(FloatVector.fromArray(FSP, src2, 0)
                           .rearrange(vshuf_wrapped),
                           vshuf.laneIsValid().not())
         .intoArray(res, 0);
   }

   public static void main(String [] args) {
       float [] res  = new float[FSP.length()];
       float [] shuf = new float[FSP.length()];
       float [] src1 = new float[FSP.length()];
       float [] src2 = new float[FSP.length()];

       for (int i = 0; i < FSP.length(); i++) {
           shuf[i] = i * 2;
       }
       for (int i = 0; i < FSP.length(); i++) {
           src1[i] = i;
           src2[i] = i + FSP.length();
       }
       for (int i = 0; i < 10000; i++) {
           micro(res, shuf, src1, src2);
       }
       validate(res, shuf, src1, src2);
       for (int i = 0; i < FSP.length(); i++) {
           shuf[i] = -i * 2;
       }
       for (int i = 0; i < 10000; i++) {
           micro(res, shuf, src1, src2);
       }
       validate(res, shuf, src1, src2);
       System.out.println("PASSED");
   }
}