source: mainline/uspace/lib/c/test/ieee_double.c@ dd7df1c

ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since dd7df1c was 88e7dc5, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 6 years ago

Add pcut tests

Adds tests for cap, gsort, ieee_double, double_to_str,
getopt, uuid, and imath.
  • Property mode set to 100644
File size: 9.1 KB
RevLine 
[88e7dc5]1/*
2 * Copyright (c) 2019 Matthieu Riolo
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <pcut/pcut.h>
30#include <ieee_double.h>
31
32union {
33 uint64_t integer;
34 double floating;
35} ieee_double_bits;
36
37const int EXP_BIAS = 1023;
38const int EXP_BIAS_UNDERFLOWED = 1075;
39const int SIGN_SHIFT = 52;
40const uint64_t HIDDEN_BIT = 1ULL << SIGN_SHIFT;
41
42PCUT_INIT;
43
44PCUT_TEST_SUITE(ieee_double);
45
46PCUT_TEST(extract_ieee_sizeof_double)
47{
48 PCUT_ASSERT_INT_EQUALS(8, sizeof(double));
49}
50
51PCUT_TEST(extract_ieee_double_pos_infinity)
52{
53 ieee_double_bits.integer = 0x7FF0000000000000ULL;
54 ieee_double_t d = extract_ieee_double(ieee_double_bits.floating);
55
56 PCUT_ASSERT_TRUE(d.is_special);
57 PCUT_ASSERT_FALSE(d.is_nan);
58 PCUT_ASSERT_TRUE(d.is_infinity);
59 PCUT_ASSERT_FALSE(d.is_negative);
60 PCUT_ASSERT_TRUE(d.is_denormal);
61 PCUT_ASSERT_FALSE(d.is_accuracy_step);
62
63 PCUT_ASSERT_INT_EQUALS(0, d.pos_val.significand);
64 PCUT_ASSERT_INT_EQUALS(0, d.pos_val.exponent);
65}
66
67PCUT_TEST(extract_ieee_double_neg_infinity)
68{
69 ieee_double_bits.integer = 0xFFF0000000000000ULL;
70 ieee_double_t d = extract_ieee_double(ieee_double_bits.floating);
71
72 PCUT_ASSERT_TRUE(d.is_special);
73 PCUT_ASSERT_FALSE(d.is_nan);
74 PCUT_ASSERT_TRUE(d.is_infinity);
75 PCUT_ASSERT_TRUE(d.is_negative);
76 PCUT_ASSERT_TRUE(d.is_denormal);
77 PCUT_ASSERT_FALSE(d.is_accuracy_step);
78
79 PCUT_ASSERT_INT_EQUALS(0, d.pos_val.significand);
80 PCUT_ASSERT_INT_EQUALS(0, d.pos_val.exponent);
81}
82
83PCUT_TEST(extract_ieee_double_nan)
84{
85 ieee_double_bits.integer = 0xFFFFFFFFFFFFFFFFULL;
86 ieee_double_t d = extract_ieee_double(ieee_double_bits.floating);
87
88 PCUT_ASSERT_TRUE(d.is_special);
89 PCUT_ASSERT_TRUE(d.is_nan);
90 PCUT_ASSERT_FALSE(d.is_infinity);
91 PCUT_ASSERT_TRUE(d.is_negative);
92 PCUT_ASSERT_TRUE(d.is_denormal);
93 PCUT_ASSERT_FALSE(d.is_accuracy_step);
94
95 PCUT_ASSERT_INT_EQUALS(0, d.pos_val.significand);
96 PCUT_ASSERT_INT_EQUALS(0, d.pos_val.exponent);
97}
98
99PCUT_TEST(extract_ieee_double_pos_zero)
100{
101 ieee_double_bits.integer = 0x0000000000000000ULL;
102 ieee_double_t d = extract_ieee_double(ieee_double_bits.floating);
103
104 PCUT_ASSERT_FALSE(d.is_special);
105 PCUT_ASSERT_FALSE(d.is_nan);
106 PCUT_ASSERT_FALSE(d.is_infinity);
107 PCUT_ASSERT_FALSE(d.is_negative);
108 PCUT_ASSERT_TRUE(d.is_denormal);
109 PCUT_ASSERT_FALSE(d.is_accuracy_step);
110
111 PCUT_ASSERT_INT_EQUALS(0, d.pos_val.significand);
112}
113
114PCUT_TEST(extract_ieee_double_neg_zero)
115{
116 ieee_double_bits.integer = 0x8000000000000000ULL;
117 ieee_double_t d = extract_ieee_double(ieee_double_bits.floating);
118
119 PCUT_ASSERT_FALSE(d.is_special);
120 PCUT_ASSERT_FALSE(d.is_nan);
121 PCUT_ASSERT_FALSE(d.is_infinity);
122
123 PCUT_ASSERT_TRUE(d.is_negative);
124 PCUT_ASSERT_TRUE(d.is_denormal);
125 PCUT_ASSERT_FALSE(d.is_accuracy_step);
126
127 PCUT_ASSERT_INT_EQUALS(0, d.pos_val.significand);
128}
129
130PCUT_TEST(extract_ieee_double_normal_pos_one)
131{
132 ieee_double_bits.integer = 0x3FF0000000000000ULL;
133 ieee_double_t d = extract_ieee_double(ieee_double_bits.floating);
134
135 PCUT_ASSERT_FALSE(d.is_special);
136 PCUT_ASSERT_FALSE(d.is_nan);
137 PCUT_ASSERT_FALSE(d.is_infinity);
138 PCUT_ASSERT_FALSE(d.is_negative);
139 PCUT_ASSERT_FALSE(d.is_denormal);
140 PCUT_ASSERT_TRUE(d.is_accuracy_step);
141
142 PCUT_ASSERT_INT_EQUALS(HIDDEN_BIT, d.pos_val.significand);
143 PCUT_ASSERT_INT_EQUALS(EXP_BIAS - EXP_BIAS_UNDERFLOWED, d.pos_val.exponent);
144}
145
146PCUT_TEST(extract_ieee_double_normal_neg_one)
147{
148 ieee_double_bits.integer = 0xBFF0000000000000ULL;
149 ieee_double_t d = extract_ieee_double(ieee_double_bits.floating);
150
151 PCUT_ASSERT_FALSE(d.is_special);
152 PCUT_ASSERT_FALSE(d.is_nan);
153 PCUT_ASSERT_FALSE(d.is_infinity);
154 PCUT_ASSERT_TRUE(d.is_negative);
155 PCUT_ASSERT_FALSE(d.is_denormal);
156 PCUT_ASSERT_TRUE(d.is_accuracy_step);
157
158 PCUT_ASSERT_INT_EQUALS(HIDDEN_BIT, d.pos_val.significand);
159 PCUT_ASSERT_INT_EQUALS(EXP_BIAS - EXP_BIAS_UNDERFLOWED, d.pos_val.exponent);
160}
161
162PCUT_TEST(extract_ieee_double_denormal_pos_smallest)
163{
164 ieee_double_bits.integer = 0x0000000000000001ULL;
165 ieee_double_t d = extract_ieee_double(ieee_double_bits.floating);
166
167 PCUT_ASSERT_FALSE(d.is_special);
168 PCUT_ASSERT_FALSE(d.is_nan);
169 PCUT_ASSERT_FALSE(d.is_infinity);
170 PCUT_ASSERT_FALSE(d.is_negative);
171 PCUT_ASSERT_TRUE(d.is_denormal);
172 PCUT_ASSERT_FALSE(d.is_accuracy_step);
173
174 PCUT_ASSERT_INT_EQUALS(1, d.pos_val.significand);
175 PCUT_ASSERT_INT_EQUALS(1 - EXP_BIAS_UNDERFLOWED, d.pos_val.exponent);
176}
177
178PCUT_TEST(extract_ieee_double_denormal_neg_smallest)
179{
180 ieee_double_bits.integer = 0x8000000000000001ULL;
181 ieee_double_t d = extract_ieee_double(ieee_double_bits.floating);
182
183 PCUT_ASSERT_FALSE(d.is_special);
184 PCUT_ASSERT_FALSE(d.is_nan);
185 PCUT_ASSERT_FALSE(d.is_infinity);
186 PCUT_ASSERT_TRUE(d.is_negative);
187 PCUT_ASSERT_TRUE(d.is_denormal);
188 PCUT_ASSERT_FALSE(d.is_accuracy_step);
189
190 PCUT_ASSERT_INT_EQUALS(1, d.pos_val.significand);
191 PCUT_ASSERT_INT_EQUALS(1 - EXP_BIAS_UNDERFLOWED, d.pos_val.exponent);
192}
193
194PCUT_TEST(extract_ieee_double_denormal_pos_largest)
195{
196 ieee_double_bits.integer = 0x000FFFFFFFFFFFFFULL;
197 ieee_double_t d = extract_ieee_double(ieee_double_bits.floating);
198
199 PCUT_ASSERT_FALSE(d.is_special);
200 PCUT_ASSERT_FALSE(d.is_nan);
201 PCUT_ASSERT_FALSE(d.is_infinity);
202 PCUT_ASSERT_FALSE(d.is_negative);
203 PCUT_ASSERT_TRUE(d.is_denormal);
204 PCUT_ASSERT_FALSE(d.is_accuracy_step);
205
206 PCUT_ASSERT_INT_EQUALS(0xFFFFFFFFFFFFFULL, d.pos_val.significand);
207 PCUT_ASSERT_INT_EQUALS(1 - EXP_BIAS_UNDERFLOWED, d.pos_val.exponent);
208}
209
210PCUT_TEST(extract_ieee_double_denormal_neg_largest)
211{
212 ieee_double_bits.integer = 0x800FFFFFFFFFFFFFULL;
213 ieee_double_t d = extract_ieee_double(ieee_double_bits.floating);
214
215 PCUT_ASSERT_FALSE(d.is_special);
216 PCUT_ASSERT_FALSE(d.is_nan);
217 PCUT_ASSERT_FALSE(d.is_infinity);
218 PCUT_ASSERT_TRUE(d.is_negative);
219 PCUT_ASSERT_TRUE(d.is_denormal);
220 PCUT_ASSERT_FALSE(d.is_accuracy_step);
221 PCUT_ASSERT_INT_EQUALS(0xFFFFFFFFFFFFFULL, d.pos_val.significand);
222 PCUT_ASSERT_INT_EQUALS(1 - EXP_BIAS_UNDERFLOWED, d.pos_val.exponent);
223}
224
225PCUT_TEST(extract_ieee_double_normal_pos_smallest)
226{
227 ieee_double_bits.integer = 0x0010000000000000ULL;
228 ieee_double_t d = extract_ieee_double(ieee_double_bits.floating);
229
230 PCUT_ASSERT_FALSE(d.is_special);
231 PCUT_ASSERT_FALSE(d.is_nan);
232 PCUT_ASSERT_FALSE(d.is_infinity);
233 PCUT_ASSERT_FALSE(d.is_negative);
234 PCUT_ASSERT_FALSE(d.is_denormal);
235 PCUT_ASSERT_FALSE(d.is_accuracy_step);
236
237 PCUT_ASSERT_INT_EQUALS(HIDDEN_BIT, d.pos_val.significand);
238 PCUT_ASSERT_INT_EQUALS(1 - EXP_BIAS_UNDERFLOWED, d.pos_val.exponent);
239}
240
241PCUT_TEST(extract_ieee_double_normal_neg_smallest)
242{
243 ieee_double_bits.integer = 0x8010000000000000ULL;
244 ieee_double_t d = extract_ieee_double(ieee_double_bits.floating);
245
246 PCUT_ASSERT_FALSE(d.is_special);
247 PCUT_ASSERT_FALSE(d.is_nan);
248 PCUT_ASSERT_FALSE(d.is_infinity);
249 PCUT_ASSERT_TRUE(d.is_negative);
250 PCUT_ASSERT_FALSE(d.is_denormal);
251 PCUT_ASSERT_FALSE(d.is_accuracy_step);
252
253 PCUT_ASSERT_INT_EQUALS(HIDDEN_BIT, d.pos_val.significand);
254 PCUT_ASSERT_INT_EQUALS(1 - EXP_BIAS_UNDERFLOWED, d.pos_val.exponent);
255}
256
257PCUT_TEST(extract_ieee_double_normal_pos_largest)
258{
259 ieee_double_bits.integer = 0x7FEFFFFFFFFFFFFFULL;
260 ieee_double_t d = extract_ieee_double(ieee_double_bits.floating);
261
262 PCUT_ASSERT_FALSE(d.is_special);
263 PCUT_ASSERT_FALSE(d.is_nan);
264 PCUT_ASSERT_FALSE(d.is_infinity);
265 PCUT_ASSERT_FALSE(d.is_negative);
266 PCUT_ASSERT_FALSE(d.is_denormal);
267 PCUT_ASSERT_FALSE(d.is_accuracy_step);
268
269 PCUT_ASSERT_INT_EQUALS(0xFFFFFFFFFFFFFULL + HIDDEN_BIT, d.pos_val.significand);
270 PCUT_ASSERT_INT_EQUALS(0x7FEULL - EXP_BIAS_UNDERFLOWED, d.pos_val.exponent);
271}
272
273PCUT_TEST(extract_ieee_double_normal_neg_largest)
274{
275 ieee_double_bits.integer = 0xFFEFFFFFFFFFFFFFULL;
276 ieee_double_t d = extract_ieee_double(ieee_double_bits.floating);
277
278 PCUT_ASSERT_FALSE(d.is_special);
279 PCUT_ASSERT_FALSE(d.is_nan);
280 PCUT_ASSERT_FALSE(d.is_infinity);
281 PCUT_ASSERT_TRUE(d.is_negative);
282 PCUT_ASSERT_FALSE(d.is_denormal);
283 PCUT_ASSERT_FALSE(d.is_accuracy_step);
284
285 PCUT_ASSERT_INT_EQUALS(0xFFFFFFFFFFFFFULL + HIDDEN_BIT, d.pos_val.significand);
286 PCUT_ASSERT_INT_EQUALS(0x7FEULL - EXP_BIAS_UNDERFLOWED, d.pos_val.exponent);
287}
288
289PCUT_EXPORT(ieee_double);
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