--- old/test/nashorn/src/jdk/nashorn/internal/runtime/doubleconv/test/IeeeDoubleTest.java 2020-04-15 19:25:03.000000000 +0530 +++ /dev/null 2020-04-15 19:25:03.000000000 +0530 @@ -1,333 +0,0 @@ -/* - * Copyright (c) 2015, 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. Oracle designates this - * particular file as subject to the "Classpath" exception as provided - * by Oracle in the LICENSE file that accompanied this code. - * - * 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. - */ - -// This file is available under and governed by the GNU General Public -// License version 2 only, as published by the Free Software Foundation. -// However, the following notice accompanied the original version of this -// file: -// -// Copyright 2006-2008 the V8 project authors. All rights reserved. - -package jdk.nashorn.internal.runtime.doubleconv.test; - -import org.testng.annotations.Test; - -import java.lang.reflect.Constructor; -import java.lang.reflect.Method; - -import static org.testng.Assert.assertEquals; -import static org.testng.Assert.assertTrue; - -/** - * IeeeDouble tests - * - * @test - * @modules jdk.scripting.nashorn/jdk.nashorn.internal.runtime.doubleconv:open - * @run testng jdk.nashorn.internal.runtime.doubleconv.test.IeeeDoubleTest - */ -@SuppressWarnings({"unchecked", "javadoc"}) -public class IeeeDoubleTest { - - static final Method asDiyFp; - static final Method asNormalizedDiyFp; - static final Method doubleToLong; - static final Method longToDouble; - static final Method isDenormal; - static final Method isSpecial; - static final Method isInfinite; - static final Method isNaN; - static final Method value; - static final Method sign; - static final Method nextDouble; - static final Method previousDouble; - static final Method normalizedBoundaries; - static final Method Infinity; - static final Method NaN; - static final Method f; - static final Method e; - static final Constructor DiyFpCtor; - - static { - try { - final Class IeeeDouble = Class.forName("jdk.nashorn.internal.runtime.doubleconv.IeeeDouble"); - final Class DiyFp = Class.forName("jdk.nashorn.internal.runtime.doubleconv.DiyFp"); - asDiyFp = method(IeeeDouble, "asDiyFp", long.class); - asNormalizedDiyFp = method(IeeeDouble, "asNormalizedDiyFp", long.class); - doubleToLong = method(IeeeDouble, "doubleToLong", double.class); - longToDouble = method(IeeeDouble, "longToDouble", long.class); - isDenormal = method(IeeeDouble, "isDenormal", long.class); - isSpecial = method(IeeeDouble, "isSpecial", long.class); - isInfinite = method(IeeeDouble, "isInfinite", long.class); - isNaN = method(IeeeDouble, "isNaN", long.class); - value = method(IeeeDouble, "value", long.class); - sign = method(IeeeDouble, "sign", long.class); - nextDouble = method(IeeeDouble, "nextDouble", long.class); - previousDouble = method(IeeeDouble, "previousDouble", long.class); - Infinity = method(IeeeDouble, "Infinity"); - NaN = method(IeeeDouble, "NaN"); - normalizedBoundaries = method(IeeeDouble, "normalizedBoundaries", long.class, DiyFp, DiyFp); - DiyFpCtor = DiyFp.getDeclaredConstructor(); - DiyFpCtor.setAccessible(true); - f = method(DiyFp, "f"); - e = method(DiyFp, "e"); - } catch (final Exception e) { - throw new RuntimeException(e); - } - } - - private static Method method(final Class clazz, final String name, final Class... params) throws NoSuchMethodException { - final Method m = clazz.getDeclaredMethod(name, params); - m.setAccessible(true); - return m; - } - - @Test - public void testUint64Conversions() throws Exception { - // Start by checking the byte-order. - final long ordered = 0x0123456789ABCDEFL; - assertEquals(3512700564088504e-318, value.invoke(null, ordered)); - - final long min_double64 = 0x0000000000000001L; - assertEquals(5e-324, value.invoke(null, min_double64)); - - final long max_double64 = 0x7fefffffffffffffL; - assertEquals(1.7976931348623157e308, value.invoke(null, max_double64)); - } - - - @Test - public void testDoubleAsDiyFp() throws Exception { - final long ordered = 0x0123456789ABCDEFL; - Object diy_fp = asDiyFp.invoke(null, ordered); - assertEquals(0x12 - 0x3FF - 52, e.invoke(diy_fp)); - // The 52 mantissa bits, plus the implicit 1 in bit 52 as a UINT64. - assertTrue(0x0013456789ABCDEFL == (long) f.invoke(diy_fp)); - - final long min_double64 = 0x0000000000000001L; - diy_fp = asDiyFp.invoke(null, min_double64); - assertEquals(-0x3FF - 52 + 1, e.invoke(diy_fp)); - // This is a denormal; so no hidden bit. - assertTrue(1L == (long) f.invoke(diy_fp)); - - final long max_double64 = 0x7fefffffffffffffL; - diy_fp = asDiyFp.invoke(null, max_double64); - assertEquals(0x7FE - 0x3FF - 52, e.invoke(diy_fp)); - assertTrue(0x001fffffffffffffL == (long) f.invoke(diy_fp)); - } - - - @Test - public void testAsNormalizedDiyFp() throws Exception { - final long ordered = 0x0123456789ABCDEFL; - Object diy_fp = asNormalizedDiyFp.invoke(null, ordered); - assertEquals(0x12 - 0x3FF - 52 - 11, (int) e.invoke(diy_fp)); - assertTrue((0x0013456789ABCDEFL << 11) == (long) f.invoke(diy_fp)); - - final long min_double64 = 0x0000000000000001L; - diy_fp = asNormalizedDiyFp.invoke(null, min_double64); - assertEquals(-0x3FF - 52 + 1 - 63, e.invoke(diy_fp)); - // This is a denormal; so no hidden bit. - assertTrue(0x8000000000000000L == (long) f.invoke(diy_fp)); - - final long max_double64 = 0x7fefffffffffffffL; - diy_fp = asNormalizedDiyFp.invoke(null, max_double64); - assertEquals(0x7FE - 0x3FF - 52 - 11, e.invoke(diy_fp)); - assertTrue((0x001fffffffffffffL << 11) == (long) f.invoke(diy_fp)); - } - - - @Test - public void testIsDenormal() throws Exception { - final long min_double64 = 0x0000000000000001L; - assertTrue((boolean) isDenormal.invoke(null, min_double64)); - long bits = 0x000FFFFFFFFFFFFFL; - assertTrue((boolean) isDenormal.invoke(null, bits)); - bits = 0x0010000000000000L; - assertTrue(!(boolean) isDenormal.invoke(null, bits)); - } - - @Test - public void testIsSpecial() throws Exception { - assertTrue((boolean) isSpecial.invoke(null, doubleToLong.invoke(null, Infinity.invoke(null)))); - assertTrue((boolean) isSpecial.invoke(null, doubleToLong.invoke(null, -(double) Infinity.invoke(null)))); - assertTrue((boolean) isSpecial.invoke(null, doubleToLong.invoke(null, NaN.invoke(null)))); - final long bits = 0xFFF1234500000000L; - assertTrue((boolean) isSpecial.invoke(null, bits)); - // Denormals are not special: - assertTrue(!(boolean) isSpecial.invoke(null, doubleToLong.invoke(null, 5e-324))); - assertTrue(!(boolean) isSpecial.invoke(null, doubleToLong.invoke(null, -5e-324))); - // And some random numbers: - assertTrue(!(boolean) isSpecial.invoke(null, doubleToLong.invoke(null, 0.0))); - assertTrue(!(boolean) isSpecial.invoke(null, doubleToLong.invoke(null, -0.0))); - assertTrue(!(boolean) isSpecial.invoke(null, doubleToLong.invoke(null, 1.0))); - assertTrue(!(boolean) isSpecial.invoke(null, doubleToLong.invoke(null, -1.0))); - assertTrue(!(boolean) isSpecial.invoke(null, doubleToLong.invoke(null, 1000000.0))); - assertTrue(!(boolean) isSpecial.invoke(null, doubleToLong.invoke(null, -1000000.0))); - assertTrue(!(boolean) isSpecial.invoke(null, doubleToLong.invoke(null, 1e23))); - assertTrue(!(boolean) isSpecial.invoke(null, doubleToLong.invoke(null, -1e23))); - assertTrue(!(boolean) isSpecial.invoke(null, doubleToLong.invoke(null, 1.7976931348623157e308))); - assertTrue(!(boolean) isSpecial.invoke(null, doubleToLong.invoke(null, -1.7976931348623157e308))); - } - - @Test - public void testIsInfinite() throws Exception { - assertTrue((boolean) isInfinite.invoke(null, doubleToLong.invoke(null, Infinity.invoke(null)))); - assertTrue((boolean) isInfinite.invoke(null, doubleToLong.invoke(null, -(double) Infinity.invoke(null)))); - assertTrue(!(boolean) isInfinite.invoke(null, doubleToLong.invoke(null, NaN.invoke(null)))); - assertTrue(!(boolean) isInfinite.invoke(null, doubleToLong.invoke(null, 0.0))); - assertTrue(!(boolean) isInfinite.invoke(null, doubleToLong.invoke(null, -0.0))); - assertTrue(!(boolean) isInfinite.invoke(null, doubleToLong.invoke(null, 1.0))); - assertTrue(!(boolean) isInfinite.invoke(null, doubleToLong.invoke(null, -1.0))); - final long min_double64 = 0x0000000000000001L; - assertTrue(!(boolean) isInfinite.invoke(null, min_double64)); - } - - @Test - public void testIsNan() throws Exception { - assertTrue((boolean) isNaN.invoke(null, doubleToLong.invoke(null, NaN.invoke(null)))); - final long other_nan = 0xFFFFFFFF00000001L; - assertTrue((boolean) isNaN.invoke(null, other_nan)); - assertTrue(!(boolean) isNaN.invoke(null, doubleToLong.invoke(null, Infinity.invoke(null)))); - assertTrue(!(boolean) isNaN.invoke(null, doubleToLong.invoke(null, -(double) Infinity.invoke(null)))); - assertTrue(!(boolean) isNaN.invoke(null, doubleToLong.invoke(null, 0.0))); - assertTrue(!(boolean) isNaN.invoke(null, doubleToLong.invoke(null, -0.0))); - assertTrue(!(boolean) isNaN.invoke(null, doubleToLong.invoke(null, 1.0))); - assertTrue(!(boolean) isNaN.invoke(null, doubleToLong.invoke(null, -1.0))); - final long min_double64 = 0x0000000000000001L; - assertTrue(!(boolean) isNaN.invoke(null, min_double64)); - } - - @Test - public void testSign() throws Exception { - assertEquals(1, (int) sign.invoke(null, doubleToLong.invoke(null, 1.0))); - assertEquals(1, (int) sign.invoke(null, doubleToLong.invoke(null, Infinity.invoke(null)))); - assertEquals(-1, (int) sign.invoke(null, doubleToLong.invoke(null, -(double) Infinity.invoke(null)))); - assertEquals(1, (int) sign.invoke(null, doubleToLong.invoke(null, 0.0))); - assertEquals(-1, (int) sign.invoke(null, doubleToLong.invoke(null, -0.0))); - final long min_double64 = 0x0000000000000001L; - assertEquals(1, (int) sign.invoke(null, min_double64)); - } - - @Test - public void testNormalizedBoundaries() throws Exception { - final Object boundary_plus = DiyFpCtor.newInstance(); - final Object boundary_minus = DiyFpCtor.newInstance(); - Object diy_fp = asNormalizedDiyFp.invoke(null, doubleToLong.invoke(null, 1.5)); - normalizedBoundaries.invoke(null, doubleToLong.invoke(null, 1.5), boundary_minus, boundary_plus); - assertEquals(e.invoke(diy_fp), e.invoke(boundary_minus)); - assertEquals(e.invoke(diy_fp), e.invoke(boundary_plus)); - // 1.5 does not have a significand of the form 2^p (for some p). - // Therefore its boundaries are at the same distance. - assertTrue((long) f.invoke(diy_fp) - (long) f.invoke(boundary_minus) == (long) f.invoke(boundary_plus) - (long) f.invoke(diy_fp)); - assertTrue((1 << 10) == (long) f.invoke(diy_fp) - (long) f.invoke(boundary_minus)); - - diy_fp =asNormalizedDiyFp.invoke(null, doubleToLong.invoke(null, 1.0)); - normalizedBoundaries.invoke(null, doubleToLong.invoke(null, 1.0), boundary_minus, boundary_plus); - assertEquals(e.invoke(diy_fp), e.invoke(boundary_minus)); - assertEquals(e.invoke(diy_fp), e.invoke(boundary_plus)); - // 1.0 does have a significand of the form 2^p (for some p). - // Therefore its lower boundary is twice as close as the upper boundary. - assertTrue((long) f.invoke(boundary_plus) - (long) f.invoke(diy_fp) > (long) f.invoke(diy_fp) - (long) f.invoke(boundary_minus)); - assertTrue((1L << 9) == (long) f.invoke(diy_fp) - (long) f.invoke(boundary_minus)); - assertTrue((1L << 10) == (long) f.invoke(boundary_plus) - (long) f.invoke(diy_fp)); - - final long min_double64 = 0x0000000000000001L; - diy_fp = asNormalizedDiyFp.invoke(null, min_double64); - normalizedBoundaries.invoke(null, min_double64, boundary_minus, boundary_plus); - assertEquals(e.invoke(diy_fp), e.invoke(boundary_minus)); - assertEquals(e.invoke(diy_fp), e.invoke(boundary_plus)); - // min-value does not have a significand of the form 2^p (for some p). - // Therefore its boundaries are at the same distance. - assertTrue((long) f.invoke(diy_fp) - (long) f.invoke(boundary_minus) == (long) f.invoke(boundary_plus) - (long) f.invoke(diy_fp)); - // Denormals have their boundaries much closer. - assertTrue(1L << 62 == (long) f.invoke(diy_fp) - (long) f.invoke(boundary_minus)); - - final long smallest_normal64 = 0x0010000000000000L; - diy_fp = asNormalizedDiyFp.invoke(null, smallest_normal64); - normalizedBoundaries.invoke(null, smallest_normal64, boundary_minus, boundary_plus); - assertEquals(e.invoke(diy_fp), e.invoke(boundary_minus)); - assertEquals(e.invoke(diy_fp), e.invoke(boundary_plus)); - // Even though the significand is of the form 2^p (for some p), its boundaries - // are at the same distance. (This is the only exception). - assertTrue((long) f.invoke(diy_fp) - (long) f.invoke(boundary_minus) == (long) f.invoke(boundary_plus) - (long) f.invoke(diy_fp)); - assertTrue(1L << 10 == (long) f.invoke(diy_fp) - (long) f.invoke(boundary_minus)); - - final long largest_denormal64 = 0x000FFFFFFFFFFFFFL; - diy_fp = asNormalizedDiyFp.invoke(null, largest_denormal64); - normalizedBoundaries.invoke(null, largest_denormal64, boundary_minus, boundary_plus); - assertEquals(e.invoke(diy_fp), e.invoke(boundary_minus)); - assertEquals(e.invoke(diy_fp), e.invoke(boundary_plus)); - assertTrue((long) f.invoke(diy_fp) - (long) f.invoke(boundary_minus) == (long) f.invoke(boundary_plus) - (long) f.invoke(diy_fp)); - assertTrue(1L << 11 == (long) f.invoke(diy_fp) - (long) f.invoke(boundary_minus)); - - final long max_double64 = 0x7fefffffffffffffL; - diy_fp = asNormalizedDiyFp.invoke(null, max_double64); - normalizedBoundaries.invoke(null, max_double64, boundary_minus, boundary_plus); - assertEquals(e.invoke(diy_fp), e.invoke(boundary_minus)); - assertEquals(e.invoke(diy_fp), e.invoke(boundary_plus)); - // max-value does not have a significand of the form 2^p (for some p). - // Therefore its boundaries are at the same distance. - assertTrue((long) f.invoke(diy_fp) - (long) f.invoke(boundary_minus) == (long) f.invoke(boundary_plus) - (long) f.invoke(diy_fp)); - assertTrue(1L << 10 == (long) f.invoke(diy_fp) - (long) f.invoke(boundary_minus)); - } - - @Test - public void testNextDouble() throws Exception { - assertEquals(4e-324, (double) nextDouble.invoke(null, doubleToLong.invoke(null, 0.0))); - assertEquals(0.0, (double) nextDouble.invoke(null, doubleToLong.invoke(null, -0.0))); - assertEquals(-0.0, (double) nextDouble.invoke(null, doubleToLong.invoke(null, -4e-324))); - assertTrue((int) sign.invoke(null, doubleToLong.invoke(null, nextDouble.invoke(null, doubleToLong.invoke(null, -0.0)))) > 0); - assertTrue((int) sign.invoke(null, doubleToLong.invoke(null, nextDouble.invoke(null, doubleToLong.invoke(null, -4e-324)))) < 0); - final long d0 = (long) doubleToLong.invoke(null, -4e-324); - final long d1 = (long) doubleToLong.invoke(null, nextDouble.invoke(null, d0)); - final long d2 = (long) doubleToLong.invoke(null, nextDouble.invoke(null, d1)); - assertEquals(-0.0, value.invoke(null, d1)); - assertTrue((int) sign.invoke(null, d1) < 0); - assertEquals(0.0, value.invoke(null, d2)); - assertTrue((int) sign.invoke(null, d2) > 0); - assertEquals(4e-324, (double) nextDouble.invoke(null, d2)); - assertEquals(-1.7976931348623157e308, (double) nextDouble.invoke(null, doubleToLong.invoke(null, -(double) Infinity.invoke(null)))); - assertEquals(Infinity.invoke(null), (double) nextDouble.invoke(null, 0x7fefffffffffffffL)); - } - - @Test - public void testPreviousDouble() throws Exception { - assertEquals(0.0, (double) previousDouble.invoke(null, doubleToLong.invoke(null, 4e-324))); - assertEquals(-0.0, (double) previousDouble.invoke(null, doubleToLong.invoke(null, 0.0))); - assertTrue((int) sign.invoke(null, doubleToLong.invoke(null, previousDouble.invoke(null, doubleToLong.invoke(null, 0.0)))) < 0); - assertEquals(-4e-324, previousDouble.invoke(null, doubleToLong.invoke(null, -0.0))); - final long d0 = (long) doubleToLong.invoke(null, 4e-324); - final long d1 = (long) doubleToLong.invoke(null, previousDouble.invoke(null, d0)); - final long d2 = (long) doubleToLong.invoke(null, previousDouble.invoke(null, d1)); - assertEquals(0.0, value.invoke(null, d1)); - assertTrue((int) sign.invoke(null, d1) > 0); - assertEquals(-0.0, value.invoke(null, d2)); - assertTrue((int) sign.invoke(null, d2) < 0); - assertEquals(-4e-324, (double) previousDouble.invoke(null, d2)); - assertEquals(1.7976931348623157e308, (double) previousDouble.invoke(null, doubleToLong.invoke(null, Infinity.invoke(null)))); - assertEquals(-(double) Infinity.invoke(null), (double) previousDouble.invoke(null, 0xffefffffffffffffL)); - } - -}