1 /* Test of isinf() substitute.
2 Copyright (C) 2007-2011 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by Ben Pfaff, 2008, using Bruno Haible's code as a
24 /* isinf must be a macro. */
26 # error missing declaration
36 long double zerol = 0.0L;
42 ASSERT (!isinf (0.0f));
43 /* Subnormal values. */
44 ASSERT (!isinf (FLT_MIN / 2));
45 ASSERT (!isinf (-FLT_MIN / 2));
47 ASSERT (!isinf (3.141f));
48 ASSERT (!isinf (3.141e30f));
49 ASSERT (!isinf (3.141e-30f));
50 ASSERT (!isinf (-2.718f));
51 ASSERT (!isinf (-2.718e30f));
52 ASSERT (!isinf (-2.718e-30f));
53 ASSERT (!isinf (FLT_MAX));
54 ASSERT (!isinf (-FLT_MAX));
55 /* Infinite values. */
56 ASSERT (isinf (1.0f / 0.0f));
57 ASSERT (isinf (-1.0f / 0.0f));
59 ASSERT (!isinf (zerof / zerof));
60 #if defined FLT_EXPBIT0_WORD && defined FLT_EXPBIT0_BIT
64 ((sizeof (float) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
65 typedef union { float value; unsigned int word[NWORDS]; } memory_float;
67 m.value = zerof / zerof;
68 # if FLT_EXPBIT0_BIT > 0
69 m.word[FLT_EXPBIT0_WORD] ^= (unsigned int) 1 << (FLT_EXPBIT0_BIT - 1);
71 m.word[FLT_EXPBIT0_WORD + (FLT_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
72 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
74 if (FLT_EXPBIT0_WORD < NWORDS / 2)
75 m.word[FLT_EXPBIT0_WORD + 1] |= (unsigned int) 1 << FLT_EXPBIT0_BIT;
77 m.word[0] |= (unsigned int) 1;
78 ASSERT (!isinf (m.value));
88 ASSERT (!isinf (0.0));
89 /* Subnormal values. */
90 ASSERT (!isinf (DBL_MIN / 2));
91 ASSERT (!isinf (-DBL_MIN / 2));
93 ASSERT (!isinf (3.141));
94 ASSERT (!isinf (3.141e30));
95 ASSERT (!isinf (3.141e-30));
96 ASSERT (!isinf (-2.718));
97 ASSERT (!isinf (-2.718e30));
98 ASSERT (!isinf (-2.718e-30));
99 ASSERT (!isinf (DBL_MAX));
100 ASSERT (!isinf (-DBL_MAX));
101 /* Infinite values. */
102 ASSERT (isinf (1.0 / 0.0));
103 ASSERT (isinf (-1.0 / 0.0));
105 ASSERT (!isinf (zerod / zerod));
106 #if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT
107 /* Signalling NaN. */
110 ((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
111 typedef union { double value; unsigned int word[NWORDS]; } memory_double;
113 m.value = zerod / zerod;
114 # if DBL_EXPBIT0_BIT > 0
115 m.word[DBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (DBL_EXPBIT0_BIT - 1);
117 m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
118 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
120 m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
121 |= (unsigned int) 1 << DBL_EXPBIT0_BIT;
122 ASSERT (!isinf (m.value));
132 ((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
133 typedef union { unsigned int word[NWORDS]; long double value; }
137 ASSERT (!isinf (0.0L));
138 /* Subnormal values. */
139 ASSERT (!isinf (LDBL_MIN / 2));
140 ASSERT (!isinf (-LDBL_MIN / 2));
142 ASSERT (!isinf (3.141L));
143 ASSERT (!isinf (3.141e30L));
144 ASSERT (!isinf (3.141e-30L));
145 ASSERT (!isinf (-2.718L));
146 ASSERT (!isinf (-2.718e30L));
147 ASSERT (!isinf (-2.718e-30L));
148 ASSERT (!isinf (LDBL_MAX));
149 ASSERT (!isinf (-LDBL_MAX));
150 /* Infinite values. */
151 ASSERT (isinf (1.0L / 0.0L));
152 ASSERT (isinf (-1.0L / 0.0L));
154 ASSERT (!isinf (zerol / zerol));
156 #if defined LDBL_EXPBIT0_WORD && defined LDBL_EXPBIT0_BIT
157 /* A bit pattern that is different from a Quiet NaN. With a bit of luck,
158 it's a Signalling NaN. */
160 memory_long_double m;
161 m.value = zerol / zerol;
162 # if LDBL_EXPBIT0_BIT > 0
163 m.word[LDBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (LDBL_EXPBIT0_BIT - 1);
165 m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
166 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
168 m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
169 |= (unsigned int) 1 << LDBL_EXPBIT0_BIT;
170 ASSERT (!isinf (m.value));
174 #if ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
175 /* Representation of an 80-bit 'long double' as an initializer for a sequence
176 of 'unsigned int' words. */
177 # ifdef WORDS_BIGENDIAN
178 # define LDBL80_WORDS(exponent,manthi,mantlo) \
179 { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
180 ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16), \
181 (unsigned int) (mantlo) << 16 \
184 # define LDBL80_WORDS(exponent,manthi,mantlo) \
185 { mantlo, manthi, exponent }
188 static memory_long_double x =
189 { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
190 ASSERT (!isinf (x.value));
193 /* Signalling NaN. */
194 static memory_long_double x =
195 { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
196 ASSERT (!isinf (x.value));
198 /* The isnanl function should recognize Pseudo-NaNs, Pseudo-Infinities,
199 Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in
200 Intel IA-64 Architecture Software Developer's Manual, Volume 1:
201 Application Architecture.
202 Table 5-2 "Floating-Point Register Encodings"
203 Figure 5-6 "Memory to Floating-Point Register Data Translation"
206 static memory_long_double x =
207 { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
208 ASSERT (!isinf (x.value));
210 { /* Pseudo-Infinity. */
211 static memory_long_double x =
212 { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
213 ASSERT (!isinf (x.value));
216 static memory_long_double x =
217 { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
218 ASSERT (!isinf (x.value));
220 { /* Unnormalized number. */
221 static memory_long_double x =
222 { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
223 ASSERT (!isinf (x.value));
225 { /* Pseudo-Denormal. */
226 static memory_long_double x =
227 { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
228 ASSERT (!isinf (x.value));