1 /*
2  * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License version 2 only, as
7  * published by the Free Software Foundation.
8  *
9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 
24 /*
25  * @test
26  * @bug 4347132 8136799
27  * @key randomness
28  * @library /test/lib
29  * @build jdk.test.lib.RandomFactory
30  * @build Tests
31  * @build FdlibmTranslit
32  * @build CubeRootTests
33  * @run main CubeRootTests
34  * @summary Tests specifically for StrictMath.cbrt
35  * @author Joseph D. Darcy
36  */
37 
38 import jdk.test.lib.RandomFactory;
39 
40 /**
41  * The tests in ../Math/CubeRootTests.java test properties that should
42  * hold for any cube root implementation, including the FDLIBM-based
43  * one required for StrictMath.cbrt.  Therefore, the test cases in
44  * ../Math/CubeRootTests.java are run against both the Math and
45  * StrictMath versions of cube root.  The role of this test is to
46  * verify that the FDLIBM cbrt algorithm is being used by running
47  * golden file tests on values that may vary from one conforming cube
48  * root implementation to another.
49  */
50 
51 public class CubeRootTests {
CubeRootTests()52     private CubeRootTests(){}
53 
main(String [] argv)54     public static void main(String [] argv) {
55         int failures = 0;
56 
57         failures += testCubeRoot();
58         failures += testAgainstTranslit();
59 
60         if (failures > 0) {
61             System.err.println("Testing the cube root incurred "
62                                + failures + " failures.");
63             throw new RuntimeException();
64         }
65     }
66 
testCubeRootCase(double input, double expected)67     static int testCubeRootCase(double input, double expected) {
68         int failures=0;
69 
70         double minus_input = -input;
71         double minus_expected = -expected;
72 
73         failures+=Tests.test("StrictMath.cbrt(double)", input,
74                              StrictMath.cbrt(input), expected);
75         failures+=Tests.test("StrictMath.cbrt(double)", minus_input,
76                              StrictMath.cbrt(minus_input), minus_expected);
77         return failures;
78     }
79 
testCubeRoot()80     static int testCubeRoot() {
81         int failures = 0;
82         double [][] testCases = {
83             {0x1.ffffffffffffep-766,    0x1.fffffffffffffp-256},
84             {0x1.ffffffffffffep-763,    0x1.fffffffffffffp-255},
85             {0x1.ffffffffffffep-760,    0x1.fffffffffffffp-254},
86             {0x1.ffffffffffffep-757,    0x1.fffffffffffffp-253},
87             {0x1.ffffffffffffep-754,    0x1.fffffffffffffp-252},
88             {0x1.ffffffffffffep-751,    0x1.fffffffffffffp-251},
89             {0x1.ffffffffffffep-748,    0x1.fffffffffffffp-250},
90             {0x1.ffffffffffffep-745,    0x1.fffffffffffffp-249},
91             {0x1.ffffffffffffep-742,    0x1.fffffffffffffp-248},
92             {0x1.ffffffffffffep-739,    0x1.fffffffffffffp-247},
93             {0x1.ffffffffffffep-1006,   0x1.fffffffffffffp-336},
94             {0x1.ffffffffffffep-736,    0x1.fffffffffffffp-246},
95             {0x1.ffffffffffffep-733,    0x1.fffffffffffffp-245},
96             {0x1.ffffffffffffep-730,    0x1.fffffffffffffp-244},
97             {0x1.ffffffffffffep-727,    0x1.fffffffffffffp-243},
98             {0x1.ffffffffffffep-724,    0x1.fffffffffffffp-242},
99             {0x1.ffffffffffffep-721,    0x1.fffffffffffffp-241},
100             {0x1.ffffffffffffep-718,    0x1.fffffffffffffp-240},
101             {0x1.ffffffffffffep-715,    0x1.fffffffffffffp-239},
102             {0x1.ffffffffffffep-712,    0x1.fffffffffffffp-238},
103             {0x1.ffffffffffffep-709,    0x1.fffffffffffffp-237},
104             {0x1.ffffffffffffep-706,    0x1.fffffffffffffp-236},
105             {0x1.ffffffffffffep-703,    0x1.fffffffffffffp-235},
106             {0x1.ffffffffffffep-700,    0x1.fffffffffffffp-234},
107             {0x1.ffffffffffffep-697,    0x1.fffffffffffffp-233},
108             {0x1.ffffffffffffep-694,    0x1.fffffffffffffp-232},
109             {0x1.ffffffffffffep-691,    0x1.fffffffffffffp-231},
110             {0x1.ffffffffffffep-1003,   0x1.fffffffffffffp-335},
111             {0x1.ffffffffffffep-688,    0x1.fffffffffffffp-230},
112             {0x1.ffffffffffffep-685,    0x1.fffffffffffffp-229},
113             {0x1.ffffffffffffep-682,    0x1.fffffffffffffp-228},
114             {0x1.ffffffffffffep-679,    0x1.fffffffffffffp-227},
115             {0x1.ffffffffffffep-676,    0x1.fffffffffffffp-226},
116             {0x1.ffffffffffffep-673,    0x1.fffffffffffffp-225},
117             {0x1.ffffffffffffep-670,    0x1.fffffffffffffp-224},
118             {0x1.ffffffffffffep-667,    0x1.fffffffffffffp-223},
119             {0x1.ffffffffffffep-664,    0x1.fffffffffffffp-222},
120             {0x1.ffffffffffffep-661,    0x1.fffffffffffffp-221},
121             {0x1.ffffffffffffep-658,    0x1.fffffffffffffp-220},
122             {0x1.ffffffffffffep-655,    0x1.fffffffffffffp-219},
123             {0x1.ffffffffffffep-652,    0x1.fffffffffffffp-218},
124             {0x1.ffffffffffffep-649,    0x1.fffffffffffffp-217},
125             {0x1.ffffffffffffep-646,    0x1.fffffffffffffp-216},
126             {0x1.ffffffffffffep-643,    0x1.fffffffffffffp-215},
127             {0x1.ffffffffffffep-1000,   0x1.fffffffffffffp-334},
128             {0x1.ffffffffffffep-640,    0x1.fffffffffffffp-214},
129             {0x1.ffffffffffffep-637,    0x1.fffffffffffffp-213},
130             {0x1.ffffffffffffep-634,    0x1.fffffffffffffp-212},
131             {0x1.ffffffffffffep-631,    0x1.fffffffffffffp-211},
132             {0x1.ffffffffffffep-628,    0x1.fffffffffffffp-210},
133             {0x1.ffffffffffffep-625,    0x1.fffffffffffffp-209},
134             {0x1.ffffffffffffep-622,    0x1.fffffffffffffp-208},
135             {0x1.ffffffffffffep-619,    0x1.fffffffffffffp-207},
136             {0x1.ffffffffffffep-616,    0x1.fffffffffffffp-206},
137             {0x1.ffffffffffffep-613,    0x1.fffffffffffffp-205},
138             {0x1.ffffffffffffep-610,    0x1.fffffffffffffp-204},
139             {0x1.ffffffffffffep-607,    0x1.fffffffffffffp-203},
140             {0x1.ffffffffffffep-604,    0x1.fffffffffffffp-202},
141             {0x1.ffffffffffffep-601,    0x1.fffffffffffffp-201},
142             {0x1.ffffffffffffep-598,    0x1.fffffffffffffp-200},
143             {0x1.ffffffffffffep-595,    0x1.fffffffffffffp-199},
144             {0x1.ffffffffffffep-997,    0x1.fffffffffffffp-333},
145             {0x1.ffffffffffffep-592,    0x1.fffffffffffffp-198},
146             {0x1.ffffffffffffep-589,    0x1.fffffffffffffp-197},
147             {0x1.ffffffffffffep-586,    0x1.fffffffffffffp-196},
148             {0x1.ffffffffffffep-583,    0x1.fffffffffffffp-195},
149             {0x1.ffffffffffffep-580,    0x1.fffffffffffffp-194},
150             {0x1.ffffffffffffep-577,    0x1.fffffffffffffp-193},
151             {0x1.ffffffffffffep-574,    0x1.fffffffffffffp-192},
152             {0x1.ffffffffffffep-571,    0x1.fffffffffffffp-191},
153             {0x1.ffffffffffffep-568,    0x1.fffffffffffffp-190},
154             {0x1.ffffffffffffep-565,    0x1.fffffffffffffp-189},
155             {0x1.ffffffffffffep-562,    0x1.fffffffffffffp-188},
156             {0x1.ffffffffffffep-559,    0x1.fffffffffffffp-187},
157             {0x1.ffffffffffffep-556,    0x1.fffffffffffffp-186},
158             {0x1.ffffffffffffep-553,    0x1.fffffffffffffp-185},
159             {0x1.ffffffffffffep-550,    0x1.fffffffffffffp-184},
160             {0x1.ffffffffffffep-547,    0x1.fffffffffffffp-183},
161             {0x1.ffffffffffffep-994,    0x1.fffffffffffffp-332},
162             {0x1.ffffffffffffep-544,    0x1.fffffffffffffp-182},
163             {0x1.ffffffffffffep-541,    0x1.fffffffffffffp-181},
164             {0x1.ffffffffffffep-538,    0x1.fffffffffffffp-180},
165             {0x1.ffffffffffffep-535,    0x1.fffffffffffffp-179},
166             {0x1.ffffffffffffep-532,    0x1.fffffffffffffp-178},
167             {0x1.ffffffffffffep-529,    0x1.fffffffffffffp-177},
168             {0x0.00000000001fp-1022,    0x1.fa9c313858568p-356},
169             {0x1.ffffffffffffep-526,    0x1.fffffffffffffp-176},
170             {0x1.ffffffffffffep-523,    0x1.fffffffffffffp-175},
171             {0x1.ffffffffffffep-520,    0x1.fffffffffffffp-174},
172             {0x1.ffffffffffffep-517,    0x1.fffffffffffffp-173},
173             {0x0.00000000001fdp-1022,   0x1.feff7f94ea34dp-356},
174             {0x1.ffffffffffffep-514,    0x1.fffffffffffffp-172},
175             {0x0.00000001fffe7p-1022,   0x1.ffff7aaa87f1bp-352},
176             {0x0.00000001fffffp-1022,   0x1.fffffaaaaa9c7p-352},
177             {0x0.00001ffffff4p-1022,    0x1.ffffffcp-348},
178             {0x0.00001ffffffffp-1022,   0x1.ffffffffaaaabp-348},
179             {0x0.01ffffffffffcp-1022,   0x1.ffffffffffeabp-344},
180             {0x1.ffffffffffffep-511,    0x1.fffffffffffffp-171},
181             {0x1.ffffffffffffep-508,    0x1.fffffffffffffp-170},
182             {0x1.ffffffffffffep-505,    0x1.fffffffffffffp-169},
183             {0x1.ffffffffffffep-502,    0x1.fffffffffffffp-168},
184             {0x1.ffffffffffffep-499,    0x1.fffffffffffffp-167},
185             {0x1.ffffffffffffep-991,    0x1.fffffffffffffp-331},
186             {0x1.ffffffffffffep-496,    0x1.fffffffffffffp-166},
187             {0x1.ffffffffffffep-493,    0x1.fffffffffffffp-165},
188             {0x1.ffffffffffffep-490,    0x1.fffffffffffffp-164},
189             {0x1.ffffffffffffep-487,    0x1.fffffffffffffp-163},
190             {0x1.ffffffffffffep-484,    0x1.fffffffffffffp-162},
191             {0x1.ffffffffffffep-481,    0x1.fffffffffffffp-161},
192             {0x1.ffffffffffffep-478,    0x1.fffffffffffffp-160},
193             {0x1.ffffffffffffep-475,    0x1.fffffffffffffp-159},
194             {0x1.ffffffffffffep-472,    0x1.fffffffffffffp-158},
195             {0x1.ffffffffffffep-469,    0x1.fffffffffffffp-157},
196             {0x1.ffffffffffffep-466,    0x1.fffffffffffffp-156},
197             {0x1.ffffffffffffep-463,    0x1.fffffffffffffp-155},
198             {0x1.ffffffffffffep-460,    0x1.fffffffffffffp-154},
199             {0x1.ffffffffffffep-457,    0x1.fffffffffffffp-153},
200             {0x1.ffffffffffffep-454,    0x1.fffffffffffffp-152},
201             {0x1.ffffffffffffep-451,    0x1.fffffffffffffp-151},
202             {0x1.ffffffffffffep-988,    0x1.fffffffffffffp-330},
203             {0x1.ffffffffffffep-448,    0x1.fffffffffffffp-150},
204             {0x1.ffffffffffffep-445,    0x1.fffffffffffffp-149},
205             {0x1.ffffffffffffep-442,    0x1.fffffffffffffp-148},
206             {0x1.ffffffffffffep-439,    0x1.fffffffffffffp-147},
207             {0x1.ffffffffffffep-436,    0x1.fffffffffffffp-146},
208             {0x1.ffffffffffffep-433,    0x1.fffffffffffffp-145},
209             {0x1.ffffffffffffep-430,    0x1.fffffffffffffp-144},
210             {0x1.ffffffffffffep-427,    0x1.fffffffffffffp-143},
211             {0x1.ffffffffffffep-424,    0x1.fffffffffffffp-142},
212             {0x1.ffffffffffffep-421,    0x1.fffffffffffffp-141},
213             {0x1.ffffffffffffep-418,    0x1.fffffffffffffp-140},
214             {0x1.ffffffffffffep-415,    0x1.fffffffffffffp-139},
215             {0x1.ffffffffffffep-412,    0x1.fffffffffffffp-138},
216             {0x1.ffffffffffffep-409,    0x1.fffffffffffffp-137},
217             {0x1.ffffffffffffep-406,    0x1.fffffffffffffp-136},
218             {0x1.ffffffffffffep-403,    0x1.fffffffffffffp-135},
219             {0x1.ffffffffffffep-985,    0x1.fffffffffffffp-329},
220             {0x1.ffffffffffffep-400,    0x1.fffffffffffffp-134},
221             {0x1.ffffffffffffep-397,    0x1.fffffffffffffp-133},
222             {0x1.ffffffffffffep-394,    0x1.fffffffffffffp-132},
223             {0x1.ffffffffffffep-391,    0x1.fffffffffffffp-131},
224             {0x1.ffffffffffffep-388,    0x1.fffffffffffffp-130},
225             {0x1.ffffffffffffep-385,    0x1.fffffffffffffp-129},
226             {0x1.ffffffffffffep-382,    0x1.fffffffffffffp-128},
227             {0x1.ffffffffffffep-379,    0x1.fffffffffffffp-127},
228             {0x1.ffffffffffffep-376,    0x1.fffffffffffffp-126},
229             {0x1.ffffffffffffep-373,    0x1.fffffffffffffp-125},
230             {0x1.ffffffffffffep-370,    0x1.fffffffffffffp-124},
231             {0x1.ffffffffffffep-367,    0x1.fffffffffffffp-123},
232             {0x1.ffffffffffffep-364,    0x1.fffffffffffffp-122},
233             {0x1.ffffffffffffep-361,    0x1.fffffffffffffp-121},
234             {0x1.ffffffffffffep-358,    0x1.fffffffffffffp-120},
235             {0x1.ffffffffffffep-355,    0x1.fffffffffffffp-119},
236             {0x1.ffffffffffffep-982,    0x1.fffffffffffffp-328},
237             {0x1.ffffffffffffep-352,    0x1.fffffffffffffp-118},
238             {0x1.ffffffffffffep-349,    0x1.fffffffffffffp-117},
239             {0x1.ffffffffffffep-346,    0x1.fffffffffffffp-116},
240             {0x1.ffffffffffffep-343,    0x1.fffffffffffffp-115},
241             {0x1.ffffffffffffep-340,    0x1.fffffffffffffp-114},
242             {0x1.ffffffffffffep-337,    0x1.fffffffffffffp-113},
243             {0x1.ffffffffffffep-334,    0x1.fffffffffffffp-112},
244             {0x1.ffffffffffffep-331,    0x1.fffffffffffffp-111},
245             {0x1.ffffffffffffep-328,    0x1.fffffffffffffp-110},
246             {0x1.ffffffffffffep-325,    0x1.fffffffffffffp-109},
247             {0x1.ffffffffffffep-322,    0x1.fffffffffffffp-108},
248             {0x1.ffffffffffffep-319,    0x1.fffffffffffffp-107},
249             {0x1.ffffffffffffep-316,    0x1.fffffffffffffp-106},
250             {0x1.ffffffffffffep-313,    0x1.fffffffffffffp-105},
251             {0x1.ffffffffffffep-310,    0x1.fffffffffffffp-104},
252             {0x1.ffffffffffffep-307,    0x1.fffffffffffffp-103},
253             {0x1.ffffffffffffep-979,    0x1.fffffffffffffp-327},
254             {0x1.ffffffffffffep-304,    0x1.fffffffffffffp-102},
255             {0x1.ffffffffffffep-301,    0x1.fffffffffffffp-101},
256             {0x1.ffffffffffffep-298,    0x1.fffffffffffffp-100},
257             {0x1.ffffffffffffep-295,    0x1.fffffffffffffp-99},
258             {0x1.ffffffffffffep-292,    0x1.fffffffffffffp-98},
259             {0x1.ffffffffffffep-289,    0x1.fffffffffffffp-97},
260             {0x1.ffffffffffffep-286,    0x1.fffffffffffffp-96},
261             {0x1.ffffffffffffep-283,    0x1.fffffffffffffp-95},
262             {0x1.ffffffffffffep-280,    0x1.fffffffffffffp-94},
263             {0x1.ffffffffffffep-277,    0x1.fffffffffffffp-93},
264             {0x1.ffffffffffffep-274,    0x1.fffffffffffffp-92},
265             {0x1.ffffffffffffep-271,    0x1.fffffffffffffp-91},
266             {0x1.ffffffffffffep-268,    0x1.fffffffffffffp-90},
267             {0x1.ffffffffffffep-265,    0x1.fffffffffffffp-89},
268             {0x1.ffffffffffffep-262,    0x1.fffffffffffffp-88},
269             {0x1.ffffffffffffep-259,    0x1.fffffffffffffp-87},
270             {0x1.ffffffffffffep-1021,   0x1.fffffffffffffp-341},
271             {0x1.ffffffffffffep-976,    0x1.fffffffffffffp-326},
272             {0x1.ffffffffffffep-256,    0x1.fffffffffffffp-86},
273             {0x1.ffffffffffffep-253,    0x1.fffffffffffffp-85},
274             {0x1.ffffffffffffep-250,    0x1.fffffffffffffp-84},
275             {0x1.ffffffffffffep-247,    0x1.fffffffffffffp-83},
276             {0x1.ffffffffffffep-244,    0x1.fffffffffffffp-82},
277             {0x1.ffffffffffffep-241,    0x1.fffffffffffffp-81},
278             {0x1.ffffffffffffep-238,    0x1.fffffffffffffp-80},
279             {0x1.ffffffffffffep-235,    0x1.fffffffffffffp-79},
280             {0x1.ffffffffffffep-232,    0x1.fffffffffffffp-78},
281             {0x1.ffffffffffffep-229,    0x1.fffffffffffffp-77},
282             {0x1.ffffffffffffep-226,    0x1.fffffffffffffp-76},
283             {0x1.ffffffffffffep-223,    0x1.fffffffffffffp-75},
284             {0x1.ffffffffffffep-220,    0x1.fffffffffffffp-74},
285             {0x1.ffffffffffffep-217,    0x1.fffffffffffffp-73},
286             {0x1.ffffffffffffep-214,    0x1.fffffffffffffp-72},
287             {0x1.ffffffffffffep-211,    0x1.fffffffffffffp-71},
288             {0x1.ffffffffffffep-973,    0x1.fffffffffffffp-325},
289             {0x1.ffffffffffffep-208,    0x1.fffffffffffffp-70},
290             {0x1.ffffffffffffep-205,    0x1.fffffffffffffp-69},
291             {0x1.ffffffffffffep-202,    0x1.fffffffffffffp-68},
292             {0x1.ffffffffffffep-199,    0x1.fffffffffffffp-67},
293             {0x1.ffffffffffffep-196,    0x1.fffffffffffffp-66},
294             {0x1.ffffffffffffep-193,    0x1.fffffffffffffp-65},
295             {0x1.ffffffffffffep-190,    0x1.fffffffffffffp-64},
296             {0x1.ffffffffffffep-187,    0x1.fffffffffffffp-63},
297             {0x1.ffffffffffffep-184,    0x1.fffffffffffffp-62},
298             {0x1.ffffffffffffep-181,    0x1.fffffffffffffp-61},
299             {0x1.ffffffffffffep-178,    0x1.fffffffffffffp-60},
300             {0x1.ffffffffffffep-175,    0x1.fffffffffffffp-59},
301             {0x1.ffffffffffffep-172,    0x1.fffffffffffffp-58},
302             {0x1.ffffffffffffep-169,    0x1.fffffffffffffp-57},
303             {0x1.ffffffffffffep-166,    0x1.fffffffffffffp-56},
304             {0x1.ffffffffffffep-163,    0x1.fffffffffffffp-55},
305             {0x1.ffffffffffffep-970,    0x1.fffffffffffffp-324},
306             {0x1.ffffffffffffep-160,    0x1.fffffffffffffp-54},
307             {0x1.ffffffffffffep-157,    0x1.fffffffffffffp-53},
308             {0x1.ffffffffffffep-154,    0x1.fffffffffffffp-52},
309             {0x1.ffffffffffffep-151,    0x1.fffffffffffffp-51},
310             {0x1.ffffffffffffep-148,    0x1.fffffffffffffp-50},
311             {0x1.ffffffffffffep-145,    0x1.fffffffffffffp-49},
312             {0x1.ffffffffffffep-142,    0x1.fffffffffffffp-48},
313             {0x1.ffffffffffffep-139,    0x1.fffffffffffffp-47},
314             {0x1.ffffffffffffep-136,    0x1.fffffffffffffp-46},
315             {0x1.ffffffffffffep-133,    0x1.fffffffffffffp-45},
316             {0x1.ffffffffffffep-130,    0x1.fffffffffffffp-44},
317             {0x1.ffffffffffffep-127,    0x1.fffffffffffffp-43},
318             {0x1.ffffffffffffep-124,    0x1.fffffffffffffp-42},
319             {0x1.ffffffffffffep-121,    0x1.fffffffffffffp-41},
320             {0x1.ffffffffffffep-118,    0x1.fffffffffffffp-40},
321             {0x1.ffffffffffffep-115,    0x1.fffffffffffffp-39},
322             {0x1.ffffffffffffep-967,    0x1.fffffffffffffp-323},
323             {0x1.ffffffffffffep-112,    0x1.fffffffffffffp-38},
324             {0x1.ffffffffffffep-109,    0x1.fffffffffffffp-37},
325             {0x1.ffffffffffffep-106,    0x1.fffffffffffffp-36},
326             {0x1.ffffffffffffep-103,    0x1.fffffffffffffp-35},
327             {0x1.ffffffffffffep-100,    0x1.fffffffffffffp-34},
328             {0x1.ffffffffffffep-97,     0x1.fffffffffffffp-33},
329             {0x1.ffffffffffffep-94,     0x1.fffffffffffffp-32},
330             {0x1.ffffffffffffep-91,     0x1.fffffffffffffp-31},
331             {0x1.ffffffffffffep-88,     0x1.fffffffffffffp-30},
332             {0x1.ffffffffffffep-85,     0x1.fffffffffffffp-29},
333             {0x1.ffffffffffffep-82,     0x1.fffffffffffffp-28},
334             {0x1.ffffffffffffep-79,     0x1.fffffffffffffp-27},
335             {0x1.ffffffffffffep-76,     0x1.fffffffffffffp-26},
336             {0x1.ffffffffffffep-73,     0x1.fffffffffffffp-25},
337             {0x1.ffffffffffffep-70,     0x1.fffffffffffffp-24},
338             {0x1.ffffffffffffep-67,     0x1.fffffffffffffp-23},
339             {0x1.ffffffffffffep-964,    0x1.fffffffffffffp-322},
340             {0x1.ffffffffffffep-64,     0x1.fffffffffffffp-22},
341             {0x1.ffffffffffffep-61,     0x1.fffffffffffffp-21},
342             {0x1.ffffffffffffep-58,     0x1.fffffffffffffp-20},
343             {0x1.ffffffffffffep-55,     0x1.fffffffffffffp-19},
344             {0x1.ffffffffffffep-52,     0x1.fffffffffffffp-18},
345             {0x1.ffffffffffffep-49,     0x1.fffffffffffffp-17},
346             {0x1.ffffffffffffep-46,     0x1.fffffffffffffp-16},
347             {0x1.ffffffffffffep-43,     0x1.fffffffffffffp-15},
348             {0x1.ffffffffffffep-40,     0x1.fffffffffffffp-14},
349             {0x1.ffffffffffffep-37,     0x1.fffffffffffffp-13},
350             {0x1.ffffffffffffep-34,     0x1.fffffffffffffp-12},
351             {0x1.ffffffffffffep-31,     0x1.fffffffffffffp-11},
352             {0x1.ffffffffffffep-28,     0x1.fffffffffffffp-10},
353             {0x1.ffffffffffffep-25,     0x1.fffffffffffffp-9},
354             {0x1.ffffffffffffep-22,     0x1.fffffffffffffp-8},
355             {0x0.000000000003ep-1022,   0x1.fa9c313858568p-357},
356             {0x1.ffffffffffffep-19,     0x1.fffffffffffffp-7},
357             {0x1.ffffffffffffep-961,    0x1.fffffffffffffp-321},
358             {0x1.ffffffffffffep-16,     0x1.fffffffffffffp-6},
359             {0x1.ffffffffffffep-13,     0x1.fffffffffffffp-5},
360             {0x1.ffffffffffffep-10,     0x1.fffffffffffffp-4},
361             {0x1.ffffffffffffep-7,      0x1.fffffffffffffp-3},
362             {0x0.000000000003fp-1022,   0x1.fd51bf2069fe6p-357},
363             {0x1.ffffffffffffep-4,      0x1.fffffffffffffp-2},
364             {0x1.ffffffffffffep-1,      0x1.fffffffffffffp-1},
365             {0x0.000000003fffcp-1022,   0x1.ffff55551c71bp-353},
366             {0x0.000003fffffe8p-1022,   0x1.ffffffcp-349},
367             {0x0.000003ffffffcp-1022,   0x1.fffffff555555p-349},
368             {0x0.003fffffffff9p-1022,   0x1.fffffffffed55p-345},
369             {0x1.ffffffffffffep2,       0x1.fffffffffffffp0},
370             {0x1.bp4,                   0x1.8p1},
371             {0x1.ffffffffffffep5,       0x1.fffffffffffffp1},
372             {0x1.f3ffffffffff4p6,       0x1.3fffffffffffep2},
373             {0x1.f3ffffffffffcp6,       0x1.3ffffffffffffp2},
374             {0x1.bp7,                   0x1.8p2},
375             {0x1.56ffffffffffep8,       0x1.bffffffffffffp2},
376             {0x1.ffffffffffffep8,       0x1.fffffffffffffp2},
377             {0x1.6c8p9,                 0x1.2p3},
378             {0x1.f3ffffffffff4p9,       0x1.3fffffffffffep3},
379             {0x1.f3ffffffffffcp9,       0x1.3ffffffffffffp3},
380             {0x1.4cbfffffffffcp10,      0x1.5fffffffffffep3},
381             {0x1.4cbfffffffffep10,      0x1.5ffffffffffffp3},
382             {0x1.bp10,                  0x1.8p3},
383             {0x1.129ffffffffa4p11,      0x1.9ffffffffffd1p3},
384             {0x1.129fffffffffep11,      0x1.9ffffffffffffp3},
385             {0x1.56ffffffffffep11,      0x1.bffffffffffffp3},
386             {0x1.a5ep11,                0x1.ep3},
387             {0x1.ffffffffffffep11,      0x1.fffffffffffffp3},
388             {0x1.330fffffffc1ep12,      0x1.0fffffffffedbp4},
389             {0x1.331p12,                0x1.1p4},
390             {0x1.6c8p12,                0x1.2p4},
391             {0x1.acafffffffffap12,      0x1.2ffffffffffffp4},
392             {0x1.acafffffffffep12,      0x1.2ffffffffffffp4},
393             {0x1.ffffffffffffep-958,    0x1.fffffffffffffp-320},
394             {0x1.ffffffffffffep-955,    0x1.fffffffffffffp-319},
395             {0x1.ffffffffffffep-952,    0x1.fffffffffffffp-318},
396             {0x1.ffffffffffffep-949,    0x1.fffffffffffffp-317},
397             {0x1.ffffffffffffep-946,    0x1.fffffffffffffp-316},
398             {0x1.ffffffffffffep-943,    0x1.fffffffffffffp-315},
399             {0x1.ffffffffffffep-940,    0x1.fffffffffffffp-314},
400             {0x1.ffffffffffffep-937,    0x1.fffffffffffffp-313},
401             {0x1.ffffffffffffep-934,    0x1.fffffffffffffp-312},
402             {0x1.ffffffffffffep-931,    0x1.fffffffffffffp-311},
403             {0x1.ffffffffffffep-1018,   0x1.fffffffffffffp-340},
404             {0x1.ffffffffffffep-928,    0x1.fffffffffffffp-310},
405             {0x1.ffffffffffffep-925,    0x1.fffffffffffffp-309},
406             {0x1.ffffffffffffep-922,    0x1.fffffffffffffp-308},
407             {0x1.ffffffffffffep-919,    0x1.fffffffffffffp-307},
408             {0x1.ffffffffffffep-916,    0x1.fffffffffffffp-306},
409             {0x1.ffffffffffffep-913,    0x1.fffffffffffffp-305},
410             {0x1.ffffffffffffep-910,    0x1.fffffffffffffp-304},
411             {0x1.ffffffffffffep-907,    0x1.fffffffffffffp-303},
412             {0x1.ffffffffffffep-904,    0x1.fffffffffffffp-302},
413             {0x0.0000000000007p-1022,   0x1.e9b5dba58189ep-358},
414             {0x1.ffffffffffffep-901,    0x1.fffffffffffffp-301},
415             {0x1.ffffffffffffep-898,    0x1.fffffffffffffp-300},
416             {0x0.0000000007ffp-1022,    0x1.ffeaa9c70ca31p-354},
417             {0x0.0000000007ffep-1022,   0x1.fffd5551c7149p-354},
418             {0x0.0000007fffffdp-1022,   0x1.ffffffcp-350},
419             {0x0.0000007fffffep-1022,   0x1.ffffffd555555p-350},
420             {0x0.0007ffffffffap-1022,   0x1.fffffffff8p-346},
421             {0x0.7ffffffffffffp-1022,   0x1.fffffffffffffp-342},
422             {0x1.ffffffffffffep-895,    0x1.fffffffffffffp-299},
423             {0x1.ffffffffffffep-892,    0x1.fffffffffffffp-298},
424             {0x1.ffffffffffffep-889,    0x1.fffffffffffffp-297},
425             {0x1.ffffffffffffep-886,    0x1.fffffffffffffp-296},
426             {0x1.ffffffffffffep-883,    0x1.fffffffffffffp-295},
427             {0x1.ffffffffffffep-1015,   0x1.fffffffffffffp-339},
428             {0x1.ffffffffffffep-880,    0x1.fffffffffffffp-294},
429             {0x1.ffffffffffffep-877,    0x1.fffffffffffffp-293},
430             {0x1.ffffffffffffep-874,    0x1.fffffffffffffp-292},
431             {0x1.ffffffffffffep-871,    0x1.fffffffffffffp-291},
432             {0x1.ffffffffffffep-868,    0x1.fffffffffffffp-290},
433             {0x1.ffffffffffffep-865,    0x1.fffffffffffffp-289},
434             {0x1.ffffffffffffep-862,    0x1.fffffffffffffp-288},
435             {0x1.ffffffffffffep-859,    0x1.fffffffffffffp-287},
436             {0x1.ffffffffffffep-856,    0x1.fffffffffffffp-286},
437             {0x1.ffffffffffffep-853,    0x1.fffffffffffffp-285},
438             {0x1.ffffffffffffep-850,    0x1.fffffffffffffp-284},
439             {0x1.ffffffffffffep-847,    0x1.fffffffffffffp-283},
440             {0x1.ffffffffffffep-844,    0x1.fffffffffffffp-282},
441             {0x1.ffffffffffffep-841,    0x1.fffffffffffffp-281},
442             {0x1.ffffffffffffep-838,    0x1.fffffffffffffp-280},
443             {0x1.ffffffffffffep-835,    0x1.fffffffffffffp-279},
444             {0x1.ffffffffffffep-1012,   0x1.fffffffffffffp-338},
445             {0x1.ffffffffffffep-832,    0x1.fffffffffffffp-278},
446             {0x1.ffffffffffffep-829,    0x1.fffffffffffffp-277},
447             {0x1.ffffffffffffep-826,    0x1.fffffffffffffp-276},
448             {0x1.ffffffffffffep-823,    0x1.fffffffffffffp-275},
449             {0x1.ffffffffffffep-820,    0x1.fffffffffffffp-274},
450             {0x1.ffffffffffffep-817,    0x1.fffffffffffffp-273},
451             {0x1.ffffffffffffep-814,    0x1.fffffffffffffp-272},
452             {0x1.ffffffffffffep-811,    0x1.fffffffffffffp-271},
453             {0x1.ffffffffffffep-808,    0x1.fffffffffffffp-270},
454             {0x1.ffffffffffffep-805,    0x1.fffffffffffffp-269},
455             {0x1.ffffffffffffep-802,    0x1.fffffffffffffp-268},
456             {0x1.ffffffffffffep-799,    0x1.fffffffffffffp-267},
457             {0x1.ffffffffffffep-796,    0x1.fffffffffffffp-266},
458             {0x1.ffffffffffffep-793,    0x1.fffffffffffffp-265},
459             {0x1.ffffffffffffep-790,    0x1.fffffffffffffp-264},
460             {0x1.ffffffffffffep-787,    0x1.fffffffffffffp-263},
461             {0x1.ffffffffffffep-1009,   0x1.fffffffffffffp-337},
462             {0x1.ffffffffffffep-784,    0x1.fffffffffffffp-262},
463             {0x1.ffffffffffffep-781,    0x1.fffffffffffffp-261},
464             {0x1.ffffffffffffep-778,    0x1.fffffffffffffp-260},
465             {0x1.ffffffffffffep-775,    0x1.fffffffffffffp-259},
466             {0x1.ffffffffffffep-772,    0x1.fffffffffffffp-258},
467             {0x1.ffffffffffffep-769,    0x1.fffffffffffffp-257},
468             {0x0.0000000000ffep-1022,   0x1.ffeaa9c70ca31p-355},
469             {0x0.0000000000fffp-1022,   0x1.fff5551c6fcd6p-355},
470             {0x0.0000000ffff86p-1022,   0x1.ffffaeaa9dbf1p-351},
471             {0x0.0000000ffffffp-1022,   0x1.ffffff5555552p-351},
472             {0x0.0000ffffffap-1022,     0x1.ffffffcp-347},
473             {0x0.0000ffffffff8p-1022,   0x1.ffffffffaaaabp-347},
474             {0x0.0fffffffffffbp-1022,   0x1.fffffffffffcbp-343}
475         };
476 
477         for(double[] testCase: testCases)
478             failures+=testCubeRootCase(testCase[0], testCase[1]);
479 
480         return failures;
481     }
482 
483     // Initialize shared random number generator
484     private static java.util.Random random = RandomFactory.getRandom();
485 
486     /**
487      * Test StrictMath.cbrt against transliteration port of cbrt.
488      */
testAgainstTranslit()489     private static int testAgainstTranslit() {
490         int failures = 0;
491         double x;
492 
493         // Test just above subnormal threshold...
494         x = Double.MIN_NORMAL;
495         failures += testRange(x, Math.ulp(x), 1000);
496 
497         // ... and just below subnormal threshold ...
498         x =  Math.nextDown(Double.MIN_NORMAL);
499         failures += testRange(x, -Math.ulp(x), 1000);
500 
501         // ... and near zero.
502         failures += testRange(0.0, Double.MIN_VALUE, 1000);
503 
504         x = Tests.createRandomDouble(random);
505 
506         // Make the increment twice the ulp value in case the random
507         // value is near an exponent threshold. Don't worry about test
508         // elements overflowing to infinity if the starting value is
509         // near Double.MAX_VALUE.
510         failures += testRange(x, 2.0 * Math.ulp(x), 1000);
511 
512         return failures;
513     }
514 
testRange(double start, double increment, int count)515     private static int testRange(double start, double increment, int count) {
516         int failures = 0;
517         double x = start;
518         for (int i = 0; i < count; i++, x += increment) {
519             failures += testCubeRootCase(x, FdlibmTranslit.Cbrt.compute(x));
520         }
521         return failures;
522     }
523 }
524