test/jdk/sun/java2d/marlin/CeilAndFloorTests.java - platform/libcore - Git at Google

 /*
  * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */

 import sun.java2d.marlin.FloatMath;

 /*
  * @test
  * @summary Check for correct implementation of FloatMath.ceil/floor
  * @run main CeilAndFloorTests
  * @modules java.desktop/sun.java2d.marlin
  */
 public class CeilAndFloorTests {

     public static String toHexString(float f) {
         if (!Float.isNaN(f))
             return Float.toHexString(f);
         else
             return "NaN(0x" + Integer.toHexString(Float.floatToRawIntBits(f)) + ")";
     }

     public static int test(String testName, float input,
                            float result, float expected) {
         if (Float.compare(expected, result) != 0) {
             System.err.println("Failure for " + testName + ":\n" +
                                "\tFor input " + input    + "\t(" + toHexString(input) + ")\n" +
                                "\texpected  " + expected + "\t(" + toHexString(expected) + ")\n" +
                                "\tgot       " + result   + "\t(" + toHexString(result) + ").");
             return 1;
         }
         else
             return 0;
     }

     public static int test_skip_0(String testName, float input,
                            float result, float expected)
     {
         // floor_int does not distinguish +0f and -0f
         // but it is not critical for Marlin
         if (Float.compare(expected, result) != 0 && (expected != 0f))
         {
             System.err.println("Failure for " + testName + ":\n" +
                                "\tFor input " + input    + "\t(" + toHexString(input) + ")\n" +
                                "\texpected  " + expected + "\t(" + toHexString(expected) + ")\n" +
                                "\tgot       " + result   + "\t(" + toHexString(result) + ").");
             return 1;
         }
         else
             return 0;
     }

     private static int testCeilCase(float input, float expected) {
         int failures = 0;
         // float result:
         failures += test("FloatMath.ceil_f", input, FloatMath.ceil_f(input), expected);
         // int result:
         failures += test("FloatMath.ceil_int", input, FloatMath.ceil_int(input), (int)expected);
         failures += test("FloatMath.ceil_f (int)", input, (int)FloatMath.ceil_f(input), (int)expected);
         return failures;
     }

     private static int testFloorCase(float input, float expected) {
         int failures = 0;
         // float result:
         failures += test       ("FloatMath.floor_f", input, FloatMath.floor_f(input), expected);
         // ignore difference between +0f and -0f:
         failures += test_skip_0("FloatMath.floor_int", input, FloatMath.floor_int(input), (int)expected);
         failures += test_skip_0("FloatMath.floor_f (int)", input, (int)FloatMath.floor_f(input), (int)expected);
         return failures;
     }

     private static int nearIntegerTests() {
         int failures = 0;

         float [] fixedPoints = {
             -0.0f,
              0.0f,
             -1.0f,
              1.0f,
             -0x1.0p52f,
              0x1.0p52f,
             -Float.MAX_VALUE,
              Float.MAX_VALUE,
              Float.NEGATIVE_INFINITY,
              Float.POSITIVE_INFINITY,
              Float.NaN,
         };

         for(float fixedPoint : fixedPoints) {
             failures += testCeilCase(fixedPoint, fixedPoint);
             failures += testFloorCase(fixedPoint, fixedPoint);
         }

         for(int i = Float.MIN_EXPONENT; i <= Float.MAX_EXPONENT; i++) {
             float powerOfTwo   = Math.scalb(1.0f, i);
             float neighborDown = Math.nextDown(powerOfTwo);
             float neighborUp   = Math.nextUp(powerOfTwo);

             if (i < 0) {
                 failures += testCeilCase( powerOfTwo,  1.0f);
                 failures += testCeilCase(-powerOfTwo, -0.0f);

                 failures += testFloorCase( powerOfTwo,  0.0f);
                 failures += testFloorCase(-powerOfTwo, -1.0f);

                 failures += testCeilCase( neighborDown, 1.0f);
                 failures += testCeilCase(-neighborDown, -0.0f);

                 failures += testFloorCase( neighborUp,  0.0f);
                 failures += testFloorCase(-neighborUp, -1.0f);
             } else {
                 failures += testCeilCase(powerOfTwo, powerOfTwo);
                 failures += testFloorCase(powerOfTwo, powerOfTwo);

                 if (neighborDown==Math.rint(neighborDown)) {
                     failures += testCeilCase( neighborDown,  neighborDown);
                     failures += testCeilCase(-neighborDown, -neighborDown);

                     failures += testFloorCase( neighborDown, neighborDown);
                     failures += testFloorCase(-neighborDown,-neighborDown);
                 } else {
                     failures += testCeilCase( neighborDown, powerOfTwo);
                     failures += testFloorCase(-neighborDown, -powerOfTwo);
                 }

                 if (neighborUp==Math.rint(neighborUp)) {
                     failures += testCeilCase(neighborUp, neighborUp);
                     failures += testCeilCase(-neighborUp, -neighborUp);

                     failures += testFloorCase(neighborUp, neighborUp);
                     failures += testFloorCase(-neighborUp, -neighborUp);
                 } else {
                     failures += testFloorCase(neighborUp, powerOfTwo);
                     failures += testCeilCase(-neighborUp, -powerOfTwo);
                 }
             }
         }

         for(int i = -(0x10000); i <= 0x10000; i++) {
             float f = (float) i;
             float neighborDown = Math.nextDown(f);
             float neighborUp   = Math.nextUp(f);

             failures += testCeilCase( f, f);
             failures += testCeilCase(-f, -f);

             failures += testFloorCase( f, f);
             failures += testFloorCase(-f, -f);

             if (Math.abs(f) > 1.0) {
                 failures += testCeilCase( neighborDown, f);
                 failures += testCeilCase(-neighborDown, -f+1);

                 failures += testFloorCase( neighborUp, f);
                 failures += testFloorCase(-neighborUp, -f-1);
             }
         }

         return failures;
     }

     public static int roundingTests() {
         int failures = 0;
         float [][] testCases = {
             { Float.MIN_VALUE,                           1.0f},
             {-Float.MIN_VALUE,                          -0.0f},
             { Math.nextDown(Float.MIN_NORMAL),           1.0f},
             {-Math.nextDown(Float.MIN_NORMAL),          -0.0f},
             { Float.MIN_NORMAL,                          1.0f},
             {-Float.MIN_NORMAL,                         -0.0f},

             { 0.1f,                                        1.0f},
             {-0.1f,                                       -0.0f},

             { 0.5f,                                        1.0f},
             {-0.5f,                                       -0.0f},

             { 1.5f,                                        2.0f},
             {-1.5f,                                       -1.0f},

             { 2.5f,                                        3.0f},
             {-2.5f,                                       -2.0f},

             { 12.3456789f,                                13.0f},
             {-12.3456789f,                               -12.0f},

             { Math.nextDown(1.0f),                         1.0f},
             { Math.nextDown(-1.0f),                       -1.0f},

             { Math.nextUp(1.0f),                           2.0f},
             { Math.nextUp(-1.0f),                         -0.0f},

             { 0x1.0p22f,                                 0x1.0p22f},
             {-0x1.0p22f,                                -0x1.0p22f},

             { Math.nextDown(0x1.0p22f),                  0x1.0p22f},
             {-Math.nextUp(0x1.0p22f),                   -0x1.0p22f},

             { Math.nextUp(0x1.0p22f),                    0x1.0p22f+1f},
             {-Math.nextDown(0x1.0p22f),                 -0x1.0p22f+1f},

             { Math.nextDown(0x1.0p23f),                  0x1.0p23f},
             {-Math.nextUp(0x1.0p23f),                   -0x1.0p23f-1f},

             { Math.nextUp(0x1.0p23f),                    0x1.0p23f+1f},
             {-Math.nextDown(0x1.0p23f),                 -0x1.0p23f+1f},
         };

         for(float[] testCase : testCases) {
             failures += testCeilCase(testCase[0], testCase[1]);
             failures += testFloorCase(-testCase[0], -testCase[1]);
         }
         return failures;
     }

     public static void main(String... args) {
         int failures = 0;

         System.out.println("nearIntegerTests");
         failures += nearIntegerTests();

         System.out.println("roundingTests");
         failures += roundingTests();

         if (failures > 0) {
             System.err.println("Testing {FloatMath}.ceil/floor incurred "
                                + failures + " failures.");
             throw new RuntimeException();
         }
     }
 }
	/*
	* Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	import sun.java2d.marlin.FloatMath;

	/*
	* @test
	* @summary Check for correct implementation of FloatMath.ceil/floor
	* @run main CeilAndFloorTests
	* @modules java.desktop/sun.java2d.marlin
	*/
	public class CeilAndFloorTests {

	public static String toHexString(float f) {
	if (!Float.isNaN(f))
	return Float.toHexString(f);
	else
	return "NaN(0x" + Integer.toHexString(Float.floatToRawIntBits(f)) + ")";
	}

	public static int test(String testName, float input,
	float result, float expected) {
	if (Float.compare(expected, result) != 0) {
	System.err.println("Failure for " + testName + ":\n" +
	"\tFor input " + input + "\t(" + toHexString(input) + ")\n" +
	"\texpected " + expected + "\t(" + toHexString(expected) + ")\n" +
	"\tgot " + result + "\t(" + toHexString(result) + ").");
	return 1;
	}
	else
	return 0;
	}

	public static int test_skip_0(String testName, float input,
	float result, float expected)
	{
	// floor_int does not distinguish +0f and -0f
	// but it is not critical for Marlin
	if (Float.compare(expected, result) != 0 && (expected != 0f))
	{
	System.err.println("Failure for " + testName + ":\n" +
	"\tFor input " + input + "\t(" + toHexString(input) + ")\n" +
	"\texpected " + expected + "\t(" + toHexString(expected) + ")\n" +
	"\tgot " + result + "\t(" + toHexString(result) + ").");
	return 1;
	}
	else
	return 0;
	}

	private static int testCeilCase(float input, float expected) {
	int failures = 0;
	// float result:
	failures += test("FloatMath.ceil_f", input, FloatMath.ceil_f(input), expected);
	// int result:
	failures += test("FloatMath.ceil_int", input, FloatMath.ceil_int(input), (int)expected);
	failures += test("FloatMath.ceil_f (int)", input, (int)FloatMath.ceil_f(input), (int)expected);
	return failures;
	}

	private static int testFloorCase(float input, float expected) {
	int failures = 0;
	// float result:
	failures += test ("FloatMath.floor_f", input, FloatMath.floor_f(input), expected);
	// ignore difference between +0f and -0f:
	failures += test_skip_0("FloatMath.floor_int", input, FloatMath.floor_int(input), (int)expected);
	failures += test_skip_0("FloatMath.floor_f (int)", input, (int)FloatMath.floor_f(input), (int)expected);
	return failures;
	}

	private static int nearIntegerTests() {
	int failures = 0;

	float [] fixedPoints = {
	-0.0f,
	0.0f,
	-1.0f,
	1.0f,
	-0x1.0p52f,
	0x1.0p52f,
	-Float.MAX_VALUE,
	Float.MAX_VALUE,
	Float.NEGATIVE_INFINITY,
	Float.POSITIVE_INFINITY,
	Float.NaN,
	};

	for(float fixedPoint : fixedPoints) {
	failures += testCeilCase(fixedPoint, fixedPoint);
	failures += testFloorCase(fixedPoint, fixedPoint);
	}

	for(int i = Float.MIN_EXPONENT; i <= Float.MAX_EXPONENT; i++) {
	float powerOfTwo = Math.scalb(1.0f, i);
	float neighborDown = Math.nextDown(powerOfTwo);
	float neighborUp = Math.nextUp(powerOfTwo);

	if (i < 0) {
	failures += testCeilCase( powerOfTwo, 1.0f);
	failures += testCeilCase(-powerOfTwo, -0.0f);

	failures += testFloorCase( powerOfTwo, 0.0f);
	failures += testFloorCase(-powerOfTwo, -1.0f);

	failures += testCeilCase( neighborDown, 1.0f);
	failures += testCeilCase(-neighborDown, -0.0f);

	failures += testFloorCase( neighborUp, 0.0f);
	failures += testFloorCase(-neighborUp, -1.0f);
	} else {
	failures += testCeilCase(powerOfTwo, powerOfTwo);
	failures += testFloorCase(powerOfTwo, powerOfTwo);

	if (neighborDown==Math.rint(neighborDown)) {
	failures += testCeilCase( neighborDown, neighborDown);
	failures += testCeilCase(-neighborDown, -neighborDown);

	failures += testFloorCase( neighborDown, neighborDown);
	failures += testFloorCase(-neighborDown,-neighborDown);
	} else {
	failures += testCeilCase( neighborDown, powerOfTwo);
	failures += testFloorCase(-neighborDown, -powerOfTwo);
	}

	if (neighborUp==Math.rint(neighborUp)) {
	failures += testCeilCase(neighborUp, neighborUp);
	failures += testCeilCase(-neighborUp, -neighborUp);

	failures += testFloorCase(neighborUp, neighborUp);
	failures += testFloorCase(-neighborUp, -neighborUp);
	} else {
	failures += testFloorCase(neighborUp, powerOfTwo);
	failures += testCeilCase(-neighborUp, -powerOfTwo);
	}
	}
	}

	for(int i = -(0x10000); i <= 0x10000; i++) {
	float f = (float) i;
	float neighborDown = Math.nextDown(f);
	float neighborUp = Math.nextUp(f);

	failures += testCeilCase( f, f);
	failures += testCeilCase(-f, -f);

	failures += testFloorCase( f, f);
	failures += testFloorCase(-f, -f);

	if (Math.abs(f) > 1.0) {
	failures += testCeilCase( neighborDown, f);
	failures += testCeilCase(-neighborDown, -f+1);

	failures += testFloorCase( neighborUp, f);
	failures += testFloorCase(-neighborUp, -f-1);
	}
	}

	return failures;
	}

	public static int roundingTests() {
	int failures = 0;
	float [][] testCases = {
	{ Float.MIN_VALUE, 1.0f},
	{-Float.MIN_VALUE, -0.0f},
	{ Math.nextDown(Float.MIN_NORMAL), 1.0f},
	{-Math.nextDown(Float.MIN_NORMAL), -0.0f},
	{ Float.MIN_NORMAL, 1.0f},
	{-Float.MIN_NORMAL, -0.0f},

	{ 0.1f, 1.0f},
	{-0.1f, -0.0f},

	{ 0.5f, 1.0f},
	{-0.5f, -0.0f},

	{ 1.5f, 2.0f},
	{-1.5f, -1.0f},

	{ 2.5f, 3.0f},
	{-2.5f, -2.0f},

	{ 12.3456789f, 13.0f},
	{-12.3456789f, -12.0f},

	{ Math.nextDown(1.0f), 1.0f},
	{ Math.nextDown(-1.0f), -1.0f},

	{ Math.nextUp(1.0f), 2.0f},
	{ Math.nextUp(-1.0f), -0.0f},

	{ 0x1.0p22f, 0x1.0p22f},
	{-0x1.0p22f, -0x1.0p22f},

	{ Math.nextDown(0x1.0p22f), 0x1.0p22f},
	{-Math.nextUp(0x1.0p22f), -0x1.0p22f},

	{ Math.nextUp(0x1.0p22f), 0x1.0p22f+1f},
	{-Math.nextDown(0x1.0p22f), -0x1.0p22f+1f},

	{ Math.nextDown(0x1.0p23f), 0x1.0p23f},
	{-Math.nextUp(0x1.0p23f), -0x1.0p23f-1f},

	{ Math.nextUp(0x1.0p23f), 0x1.0p23f+1f},
	{-Math.nextDown(0x1.0p23f), -0x1.0p23f+1f},
	};

	for(float[] testCase : testCases) {
	failures += testCeilCase(testCase[0], testCase[1]);
	failures += testFloorCase(-testCase[0], -testCase[1]);
	}
	return failures;
	}

	public static void main(String... args) {
	int failures = 0;

	System.out.println("nearIntegerTests");
	failures += nearIntegerTests();

	System.out.println("roundingTests");
	failures += roundingTests();

	if (failures > 0) {
	System.err.println("Testing {FloatMath}.ceil/floor incurred "
	+ failures + " failures.");
	throw new RuntimeException();
	}
	}
	}