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/*

 * @test

 * @bug 6896617

 * @summary Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() with SSE instructions on x86

 * @modules java.base/jdk.internal.misc

 *          java.base/sun.nio.cs

 *          java.management

 *

 * @run main/othervm/timeout=1200 -Xbatch -Xmx256m compiler.codegen.Test6896617

 */

package compiler.codegen;

import jdk.test.lib.Utils;

import java.nio.ByteBuffer;

import java.nio.CharBuffer;

import java.nio.charset.Charset;

import java.nio.charset.CharsetDecoder;

import java.nio.charset.CharsetEncoder;

import java.nio.charset.CodingErrorAction;

import java.util.Arrays;

import java.util.Random;

public class Test6896617 {

    final static int SIZE = 256;

    public static void main(String[] args) {

        String csn = "ISO-8859-1";

        Charset cs = Charset.forName(csn);

        CharsetEncoder enc = cs.newEncoder();

        enc.onMalformedInput(CodingErrorAction.REPLACE)

           .onUnmappableCharacter(CodingErrorAction.REPLACE);

        CharsetDecoder dec = cs.newDecoder();

        dec.onMalformedInput(CodingErrorAction.REPLACE)

           .onUnmappableCharacter(CodingErrorAction.REPLACE);

        byte repl = (byte)'?';

        enc.replaceWith(new byte[] { repl });

        // Use internal API for tests.

        sun.nio.cs.ArrayEncoder arrenc = (sun.nio.cs.ArrayEncoder)enc;

        sun.nio.cs.ArrayDecoder arrdec = (sun.nio.cs.ArrayDecoder)dec;

        // Populate char[] with chars which can be encoded by ISO_8859_1 (<= 0xFF)

        Random rnd = Utils.getRandomInstance();

        int maxchar = 0xFF;

        char[] a = new char[SIZE];

        byte[] b = new byte[SIZE];

        char[] at = new char[SIZE];

        byte[] bt = new byte[SIZE];

        for (int i = 0; i < SIZE; i++) {

            char c = (char) rnd.nextInt(maxchar);

            if (!enc.canEncode(c)) {

                System.out.printf("Something wrong: can't encode c=%03x\n", (int)c);

                System.exit(97);

            }

            a[i] = c;

            b[i] = (byte)c;

            at[i] = (char)-1;

            bt[i] = (byte)-1;

        }

        if (arrenc.encode(a, 0, SIZE, bt) != SIZE || !Arrays.equals(b, bt)) {

            System.out.println("Something wrong: ArrayEncoder.encode failed");

            System.exit(97);

        }

        if (arrdec.decode(b, 0, SIZE, at) != SIZE || !Arrays.equals(a, at)) {

            System.out.println("Something wrong: ArrayDecoder.decode failed");

            System.exit(97);

        }

        for (int i = 0; i < SIZE; i++) {

            at[i] = (char)-1;

            bt[i] = (byte)-1;

        }

        ByteBuffer bb  = ByteBuffer.wrap(b);

        CharBuffer ba  = CharBuffer.wrap(a);

        ByteBuffer bbt = ByteBuffer.wrap(bt);

        CharBuffer bat = CharBuffer.wrap(at);

        if (!enc.encode(ba, bbt, true).isUnderflow() || !Arrays.equals(b, bt)) {

            System.out.println("Something wrong: Encoder.encode failed");

            System.exit(97);

        }

        if (!dec.decode(bb, bat, true).isUnderflow() || !Arrays.equals(a, at)) {

            System.out.println("Something wrong: Decoder.decode failed");

            System.exit(97);

        }

        for (int i = 0; i < SIZE; i++) {

            at[i] = (char)-1;

            bt[i] = (byte)-1;

        }

        // Warm up

        boolean failed = false;

        int result = 0;

        for (int i = 0; i < 10000; i++) {

            result += arrenc.encode(a, 0, SIZE, bt);

            result -= arrdec.decode(b, 0, SIZE, at);

        }

        for (int i = 0; i < 10000; i++) {

            result += arrenc.encode(a, 0, SIZE, bt);

            result -= arrdec.decode(b, 0, SIZE, at);

        }

        for (int i = 0; i < 10000; i++) {

            result += arrenc.encode(a, 0, SIZE, bt);

            result -= arrdec.decode(b, 0, SIZE, at);

        }

        if (result != 0 || !Arrays.equals(b, bt) || !Arrays.equals(a, at)) {

            failed = true;

            System.out.println("Failed: ArrayEncoder.encode char[" + SIZE + "] and ArrayDecoder.decode byte[" + SIZE + "]");

        }

        for (int i = 0; i < SIZE; i++) {

            at[i] = (char)-1;

            bt[i] = (byte)-1;

        }

        boolean is_underflow = true;

        for (int i = 0; i < 10000; i++) {

            ba.clear(); bb.clear(); bat.clear(); bbt.clear();

            boolean enc_res = enc.encode(ba, bbt, true).isUnderflow();

            boolean dec_res = dec.decode(bb, bat, true).isUnderflow();

            is_underflow = is_underflow && enc_res && dec_res;

        }

        for (int i = 0; i < SIZE; i++) {

            at[i] = (char)-1;

            bt[i] = (byte)-1;

        }

        for (int i = 0; i < 10000; i++) {

            ba.clear(); bb.clear(); bat.clear(); bbt.clear();

            boolean enc_res = enc.encode(ba, bbt, true).isUnderflow();

            boolean dec_res = dec.decode(bb, bat, true).isUnderflow();

            is_underflow = is_underflow && enc_res && dec_res;

        }

        for (int i = 0; i < SIZE; i++) {

            at[i] = (char)-1;

            bt[i] = (byte)-1;

        }

        for (int i = 0; i < 10000; i++) {

            ba.clear(); bb.clear(); bat.clear(); bbt.clear();

            boolean enc_res = enc.encode(ba, bbt, true).isUnderflow();

            boolean dec_res = dec.decode(bb, bat, true).isUnderflow();

            is_underflow = is_underflow && enc_res && dec_res;

        }

        if (!is_underflow || !Arrays.equals(b, bt) || !Arrays.equals(a, at)) {

            failed = true;

            System.out.println("Failed: Encoder.encode char[" + SIZE + "] and Decoder.decode byte[" + SIZE + "]");

        }

        // Test encoder with different source and destination sizes

        System.out.println("Testing different source and destination sizes");

        for (int i = 1; i <= SIZE; i++) {

            for (int j = 1; j <= SIZE; j++) {

                bt = new byte[j];

                // very source's SIZE

                result = arrenc.encode(a, 0, i, bt);

                int l = Math.min(i, j);

                if (result != l) {

                    failed = true;

                    System.out.println("Failed: encode char[" + i + "] to byte[" + j + "]: result = " + result + ", expected " + l);

                }

                for (int k = 0; k < l; k++) {

                    if (bt[k] != b[k]) {

                        failed = true;

                        System.out.println("Failed: encoded byte[" + k + "] (" + bt[k] + ") != " + b[k]);

                    }

                }

                // very source's offset

                int sz = SIZE - i + 1;

                result = arrenc.encode(a, i-1, sz, bt);

                l = Math.min(sz, j);

                if (result != l) {

                    failed = true;

                    System.out.println("Failed: encode char[" + sz + "] to byte[" + j + "]: result = " + result + ", expected " + l);

                }

                for (int k = 0; k < l; k++) {

                    if (bt[k] != b[i+k-1]) {

                        failed = true;

                        System.out.println("Failed: encoded byte[" + k + "] (" + bt[k] + ") != " + b[i+k-1]);

                    }

                }

            }

        }

        // Test encoder with char > 0xFF

        System.out.println("Testing big char");

        byte orig = (byte)'A';

        bt = new byte[SIZE];

        for (int i = 1; i <= SIZE; i++) {

            for (int j = 0; j < i; j++) {

                a[j] += 0x100;

                // make sure to replace a different byte

                bt[j] = orig;

                result = arrenc.encode(a, 0, i, bt);

                if (result != i) {

                    failed = true;

                    System.out.println("Failed: encode char[" + i + "] to byte[" + i + "]: result = " + result + ", expected " + i);

                }

                if (bt[j] != repl) {

                    failed = true;

                    System.out.println("Failed: encoded replace byte[" + j + "] (" + bt[j] + ") != " + repl);

                }

                bt[j] = b[j]; // Restore to compare whole array

                for (int k = 0; k < i; k++) {

                    if (bt[k] != b[k]) {

                        failed = true;

                        System.out.println("Failed: encoded byte[" + k + "] (" + bt[k] + ") != " + b[k]);

                    }

                }

                a[j] -= 0x100; // Restore

            }

        }

        // Test sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() performance.

        int itrs = Integer.getInteger("iterations", 1000000);

        int size = Integer.getInteger("size", 256);

        a  = new char[size];

        b  = new byte[size];

        bt = new byte[size];

        for (int i = 0; i < size; i++) {

            char c = (char) rnd.nextInt(maxchar);

            if (!enc.canEncode(c)) {

                System.out.printf("Something wrong: can't encode c=%03x\n", (int)c);

                System.exit(97);

            }

            a[i] = c;

            b[i]  = (byte)-1;

            bt[i] = (byte)c;

        }

        ba = CharBuffer.wrap(a);

        bb = ByteBuffer.wrap(b);

        boolean enc_res = enc.encode(ba, bb, true).isUnderflow();

        if (!enc_res || !Arrays.equals(b, bt)) {

            failed = true;

            System.out.println("Failed 1: Encoder.encode char[" + size + "]");

        }

        for (int i = 0; i < size; i++) {

            b[i] = (byte)-1;

        }

        // Make sure to recompile method if needed before performance run.

        for (int i = 0; i < 10000; i++) {

            ba.clear(); bb.clear();

            enc_res = enc_res && enc.encode(ba, bb, true).isUnderflow();

        }

        for (int i = 0; i < size; i++) {

            b[i] = (byte)-1;

        }

        for (int i = 0; i < 10000; i++) {

            ba.clear(); bb.clear();

            enc_res = enc_res && enc.encode(ba, bb, true).isUnderflow();

        }

        if (!enc_res || !Arrays.equals(b, bt)) {

            failed = true;

            System.out.println("Failed 2: Encoder.encode char[" + size + "]");

        }

        for (int i = 0; i < size; i++) {

            b[i] = (byte)-1;

        }

        System.out.println("Testing ISO_8859_1$Encode.encodeArrayLoop() performance");

        long start = System.currentTimeMillis();

        for (int i = 0; i < itrs; i++) {

            ba.clear(); bb.clear();

            enc_res = enc_res && enc.encode(ba, bb, true).isUnderflow();

        }

        long end = System.currentTimeMillis();

        if (!enc_res || !Arrays.equals(b, bt)) {

            failed = true;

            System.out.println("Failed 3: Encoder.encode char[" + size + "]");

        } else {

            System.out.println("size: " + size + " time: " + (end - start));

        }

        // Test sun.nio.cs.ISO_8859_1$Encode.encode() performance.

        // Make sure to recompile method if needed before performance run.

        result = 0;

        for (int i = 0; i < size; i++) {

            b[i] = (byte)-1;

        }

        for (int i = 0; i < 10000; i++) {

            result += arrenc.encode(a, 0, size, b);

        }

        for (int i = 0; i < size; i++) {

            b[i] = (byte)-1;

        }

        for (int i = 0; i < 10000; i++) {

            result += arrenc.encode(a, 0, size, b);

        }

        if (result != size*20000 || !Arrays.equals(b, bt)) {

            failed = true;

            System.out.println("Failed 1: ArrayEncoder.encode char[" + SIZE + "]");

        }

        for (int i = 0; i < size; i++) {

            b[i] = (byte)-1;

        }

        System.out.println("Testing ISO_8859_1$Encode.encode() performance");

        result = 0;

        start = System.currentTimeMillis();

        for (int i = 0; i < itrs; i++) {

            result += arrenc.encode(a, 0, size, b);

        }

        end = System.currentTimeMillis();

        if (!Arrays.equals(b, bt)) {

            failed = true;

            System.out.println("Failed 2: ArrayEncoder.encode char[" + size + "]");

        } else {

            System.out.println("size: " + size + " time: " + (end - start));

        }

        if (failed) {

          System.out.println("FAILED");

          System.exit(97);

        }

        System.out.println("PASSED");

    }

}