2 Copyright (C) 1997-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
19 #include "libm-test-driver.c"
21 static const struct test_f_f_data round_test_data[] =
23 TEST_f_f (round, 0, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
24 TEST_f_f (round, minus_zero, minus_zero, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
25 TEST_f_f (round, plus_infty, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
26 TEST_f_f (round, minus_infty, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
27 TEST_f_f (round, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
28 TEST_f_f (round, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
29 TEST_f_f (round, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
30 TEST_f_f (round, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
32 TEST_f_f (round, min_subnorm_value, 0.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
33 TEST_f_f (round, min_value, 0.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
34 TEST_f_f (round, 1, 1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
35 TEST_f_f (round, 2, 2, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
36 TEST_f_f (round, 0x1p23, 0x1p23, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
37 TEST_f_f (round, 0x1p24, 0x1p24, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
38 TEST_f_f (round, 0x1p25, 0x1p25, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
39 TEST_f_f (round, 0x1p52, 0x1p52, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
40 TEST_f_f (round, 0x1p53, 0x1p53, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
41 TEST_f_f (round, 0x1p54, 0x1p54, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
42 TEST_f_f (round, 0x1p63, 0x1p63, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
43 TEST_f_f (round, 0x1p64, 0x1p64, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
44 TEST_f_f (round, 0x1p65, 0x1p65, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
45 TEST_f_f (round, 0x1p105, 0x1p105, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
46 TEST_f_f (round, 0x1p106, 0x1p106, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
47 TEST_f_f (round, 0x1p107, 0x1p107, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
48 TEST_f_f (round, 0x1p112, 0x1p112, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
49 TEST_f_f (round, 0x1p113, 0x1p113, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
50 TEST_f_f (round, 0x1p114, 0x1p114, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
51 TEST_f_f (round, max_value, max_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
52 TEST_f_f (round, -min_subnorm_value, minus_zero, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
53 TEST_f_f (round, -min_value, minus_zero, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
54 TEST_f_f (round, -1, -1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
55 TEST_f_f (round, -2, -2, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
56 TEST_f_f (round, -0x1p23, -0x1p23, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
57 TEST_f_f (round, -0x1p24, -0x1p24, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
58 TEST_f_f (round, -0x1p25, -0x1p25, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
59 TEST_f_f (round, -0x1p52, -0x1p52, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
60 TEST_f_f (round, -0x1p53, -0x1p53, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
61 TEST_f_f (round, -0x1p54, -0x1p54, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
62 TEST_f_f (round, -0x1p63, -0x1p63, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
63 TEST_f_f (round, -0x1p64, -0x1p64, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
64 TEST_f_f (round, -0x1p65, -0x1p65, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
65 TEST_f_f (round, -0x1p105, -0x1p105, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
66 TEST_f_f (round, -0x1p106, -0x1p106, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
67 TEST_f_f (round, -0x1p107, -0x1p107, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
68 TEST_f_f (round, -0x1p112, -0x1p112, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
69 TEST_f_f (round, -0x1p113, -0x1p113, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
70 TEST_f_f (round, -0x1p114, -0x1p114, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
71 TEST_f_f (round, -max_value, -max_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
73 TEST_f_f (round, 0.2L, 0.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
74 TEST_f_f (round, -0.2L, minus_zero, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
75 TEST_f_f (round, 0.5, 1.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
76 TEST_f_f (round, -0.5, -1.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
77 TEST_f_f (round, 0.8L, 1.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
78 TEST_f_f (round, -0.8L, -1.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
79 TEST_f_f (round, 1.5, 2.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
80 TEST_f_f (round, -1.5, -2.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
81 TEST_f_f (round, 0.1, 0.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
82 TEST_f_f (round, 0.25, 0.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
83 TEST_f_f (round, 0.625, 1.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
84 TEST_f_f (round, -0.1, -0.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
85 TEST_f_f (round, -0.25, -0.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
86 TEST_f_f (round, -0.625, -1.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
87 TEST_f_f (round, 2097152.5, 2097153, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
88 TEST_f_f (round, -2097152.5, -2097153, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
90 #if !TEST_COND_binary32
91 TEST_f_f (round, 0xffffffffffff.0p0L, 0xffffffffffff.0p0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
92 TEST_f_f (round, 0xffffffffffff.4p0L, 0xffffffffffff.0p0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
93 TEST_f_f (round, 0xffffffffffff.8p0L, 0x1000000000000.0p0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
94 TEST_f_f (round, 0xffffffffffff.cp0L, 0x1000000000000.0p0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
95 TEST_f_f (round, -0xffffffffffff.0p0L, -0xffffffffffff.0p0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
96 TEST_f_f (round, -0xffffffffffff.4p0L, -0xffffffffffff.0p0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
97 TEST_f_f (round, -0xffffffffffff.8p0L, -0x1000000000000.0p0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
98 TEST_f_f (round, -0xffffffffffff.cp0L, -0x1000000000000.0p0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
102 /* The result can only be represented in long double. */
103 TEST_f_f (round, 4503599627370495.5L, 4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
104 TEST_f_f (round, 4503599627370496.25L, 4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
105 TEST_f_f (round, 4503599627370496.5L, 4503599627370497.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
106 TEST_f_f (round, 4503599627370496.75L, 4503599627370497.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
107 TEST_f_f (round, 4503599627370497.5L, 4503599627370498.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
109 TEST_f_f (round, 4503599627370494.5000000000001L, 4503599627370495.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
110 TEST_f_f (round, 4503599627370495.5000000000001L, 4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
111 TEST_f_f (round, 4503599627370496.5000000000001L, 4503599627370497.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
114 TEST_f_f (round, -4503599627370495.5L, -4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
115 TEST_f_f (round, -4503599627370496.25L, -4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
116 TEST_f_f (round, -4503599627370496.5L, -4503599627370497.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
117 TEST_f_f (round, -4503599627370496.75L, -4503599627370497.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
118 TEST_f_f (round, -4503599627370497.5L, -4503599627370498.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
120 TEST_f_f (round, -4503599627370494.5000000000001L, -4503599627370495.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
121 TEST_f_f (round, -4503599627370495.5000000000001L, -4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
122 TEST_f_f (round, -4503599627370496.5000000000001L, -4503599627370497.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
125 TEST_f_f (round, 9007199254740991.5L, 9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
126 TEST_f_f (round, 9007199254740992.25L, 9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
127 TEST_f_f (round, 9007199254740992.5L, 9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
128 TEST_f_f (round, 9007199254740992.75L, 9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
129 TEST_f_f (round, 9007199254740993.5L, 9007199254740994.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
131 TEST_f_f (round, -9007199254740991.5L, -9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
132 TEST_f_f (round, -9007199254740992.25L, -9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
133 TEST_f_f (round, -9007199254740992.5L, -9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
134 TEST_f_f (round, -9007199254740992.75L, -9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
135 TEST_f_f (round, -9007199254740993.5L, -9007199254740994.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
138 TEST_f_f (round, 9007199254740991.0000000000001L, 9007199254740991.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
139 TEST_f_f (round, 9007199254740992.0000000000001L, 9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
140 TEST_f_f (round, 9007199254740993.0000000000001L, 9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
141 TEST_f_f (round, 9007199254740991.5000000000001L, 9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
142 TEST_f_f (round, 9007199254740992.5000000000001L, 9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
143 TEST_f_f (round, 9007199254740993.5000000000001L, 9007199254740994.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
145 TEST_f_f (round, -9007199254740991.0000000000001L, -9007199254740991.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
146 TEST_f_f (round, -9007199254740992.0000000000001L, -9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
147 TEST_f_f (round, -9007199254740993.0000000000001L, -9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
148 TEST_f_f (round, -9007199254740991.5000000000001L, -9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
149 TEST_f_f (round, -9007199254740992.5000000000001L, -9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
150 TEST_f_f (round, -9007199254740993.5000000000001L, -9007199254740994.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
153 TEST_f_f (round, 72057594037927935.5L, 72057594037927936.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
154 TEST_f_f (round, 72057594037927936.25L, 72057594037927936.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
155 TEST_f_f (round, 72057594037927936.5L, 72057594037927937.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
156 TEST_f_f (round, 72057594037927936.75L, 72057594037927937.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
157 TEST_f_f (round, 72057594037927937.5L, 72057594037927938.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
159 TEST_f_f (round, -72057594037927935.5L, -72057594037927936.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
160 TEST_f_f (round, -72057594037927936.25L, -72057594037927936.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
161 TEST_f_f (round, -72057594037927936.5L, -72057594037927937.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
162 TEST_f_f (round, -72057594037927936.75L, -72057594037927937.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
163 TEST_f_f (round, -72057594037927937.5L, -72057594037927938.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
165 /* Check cases where first double is a exact integer higher than 2^52 and
166 the precision is determined by second long double for IBM long double. */
167 TEST_f_f (round, 34503599627370498.515625L, 34503599627370499.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
168 TEST_f_f (round, -34503599627370498.515625L, -34503599627370499.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
170 TEST_f_f (round, 1192568192774434123539907640624.484375L, 1192568192774434123539907640624.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
171 TEST_f_f (round, -1192568192774434123539907640624.484375L, -1192568192774434123539907640624.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
174 TEST_f_f (round, 10141204801825835211973625643007.5L, 10141204801825835211973625643008.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
175 TEST_f_f (round, 10141204801825835211973625643008.25L, 10141204801825835211973625643008.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
176 TEST_f_f (round, 10141204801825835211973625643008.5L, 10141204801825835211973625643009.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
177 TEST_f_f (round, 10141204801825835211973625643008.75L, 10141204801825835211973625643009.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
178 TEST_f_f (round, 10141204801825835211973625643009.5L, 10141204801825835211973625643010.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
185 ALL_RM_TEST (round, 1, round_test_data, RUN_TEST_LOOP_f_f, END);