1 /* Test of isinf() substitute.
2 Copyright (C) 2007-2009 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
34 #define ASSERT(expr) \
39 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
48 long double zerol = 0.0L;
54 ASSERT (!isinf (0.0f));
55 /* Subnormal values. */
56 ASSERT (!isinf (FLT_MIN / 2));
57 ASSERT (!isinf (-FLT_MIN / 2));
59 ASSERT (!isinf (3.141f));
60 ASSERT (!isinf (3.141e30f));
61 ASSERT (!isinf (3.141e-30f));
62 ASSERT (!isinf (-2.718f));
63 ASSERT (!isinf (-2.718e30f));
64 ASSERT (!isinf (-2.718e-30f));
65 ASSERT (!isinf (FLT_MAX));
66 ASSERT (!isinf (-FLT_MAX));
67 /* Infinite values. */
68 ASSERT (isinf (1.0f / 0.0f));
69 ASSERT (isinf (-1.0f / 0.0f));
71 ASSERT (!isinf (zerof / zerof));
72 #if defined FLT_EXPBIT0_WORD && defined FLT_EXPBIT0_BIT
76 ((sizeof (float) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
77 typedef union { float value; unsigned int word[NWORDS]; } memory_float;
79 m.value = zerof / zerof;
80 # if FLT_EXPBIT0_BIT > 0
81 m.word[FLT_EXPBIT0_WORD] ^= (unsigned int) 1 << (FLT_EXPBIT0_BIT - 1);
83 m.word[FLT_EXPBIT0_WORD + (FLT_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
84 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
86 if (FLT_EXPBIT0_WORD < NWORDS / 2)
87 m.word[FLT_EXPBIT0_WORD + 1] |= (unsigned int) 1 << FLT_EXPBIT0_BIT;
89 m.word[0] |= (unsigned int) 1;
90 ASSERT (!isinf (m.value));
100 ASSERT (!isinf (0.0));
101 /* Subnormal values. */
102 ASSERT (!isinf (DBL_MIN / 2));
103 ASSERT (!isinf (-DBL_MIN / 2));
105 ASSERT (!isinf (3.141));
106 ASSERT (!isinf (3.141e30));
107 ASSERT (!isinf (3.141e-30));
108 ASSERT (!isinf (-2.718));
109 ASSERT (!isinf (-2.718e30));
110 ASSERT (!isinf (-2.718e-30));
111 ASSERT (!isinf (DBL_MAX));
112 ASSERT (!isinf (-DBL_MAX));
113 /* Infinite values. */
114 ASSERT (isinf (1.0 / 0.0));
115 ASSERT (isinf (-1.0 / 0.0));
117 ASSERT (!isinf (zerod / zerod));
118 #if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT
119 /* Signalling NaN. */
122 ((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
123 typedef union { double value; unsigned int word[NWORDS]; } memory_double;
125 m.value = zerod / zerod;
126 # if DBL_EXPBIT0_BIT > 0
127 m.word[DBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (DBL_EXPBIT0_BIT - 1);
129 m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
130 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
132 m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
133 |= (unsigned int) 1 << DBL_EXPBIT0_BIT;
134 ASSERT (!isinf (m.value));
144 ((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
145 typedef union { unsigned int word[NWORDS]; long double value; }
149 ASSERT (!isinf (0.0L));
150 /* Subnormal values. */
151 ASSERT (!isinf (LDBL_MIN / 2));
152 ASSERT (!isinf (-LDBL_MIN / 2));
154 ASSERT (!isinf (3.141L));
155 ASSERT (!isinf (3.141e30L));
156 ASSERT (!isinf (3.141e-30L));
157 ASSERT (!isinf (-2.718L));
158 ASSERT (!isinf (-2.718e30L));
159 ASSERT (!isinf (-2.718e-30L));
160 ASSERT (!isinf (LDBL_MAX));
161 ASSERT (!isinf (-LDBL_MAX));
162 /* Infinite values. */
163 ASSERT (isinf (1.0L / 0.0L));
164 ASSERT (isinf (-1.0L / 0.0L));
166 ASSERT (!isinf (zerol / zerol));
168 #if defined LDBL_EXPBIT0_WORD && defined LDBL_EXPBIT0_BIT
169 /* A bit pattern that is different from a Quiet NaN. With a bit of luck,
170 it's a Signalling NaN. */
172 memory_long_double m;
173 m.value = zerol / zerol;
174 # if LDBL_EXPBIT0_BIT > 0
175 m.word[LDBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (LDBL_EXPBIT0_BIT - 1);
177 m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
178 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
180 m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
181 |= (unsigned int) 1 << LDBL_EXPBIT0_BIT;
182 ASSERT (!isinf (m.value));
186 #if ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
187 /* Representation of an 80-bit 'long double' as an initializer for a sequence
188 of 'unsigned int' words. */
189 # ifdef WORDS_BIGENDIAN
190 # define LDBL80_WORDS(exponent,manthi,mantlo) \
191 { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
192 ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16), \
193 (unsigned int) (mantlo) << 16 \
196 # define LDBL80_WORDS(exponent,manthi,mantlo) \
197 { mantlo, manthi, exponent }
200 static memory_long_double x =
201 { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
202 ASSERT (!isinf (x.value));
205 /* Signalling NaN. */
206 static memory_long_double x =
207 { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
208 ASSERT (!isinf (x.value));
210 /* The isnanl function should recognize Pseudo-NaNs, Pseudo-Infinities,
211 Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in
212 Intel IA-64 Architecture Software Developer's Manual, Volume 1:
213 Application Architecture.
214 Table 5-2 "Floating-Point Register Encodings"
215 Figure 5-6 "Memory to Floating-Point Register Data Translation"
218 static memory_long_double x =
219 { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
220 ASSERT (!isinf (x.value));
222 { /* Pseudo-Infinity. */
223 static memory_long_double x =
224 { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
225 ASSERT (!isinf (x.value));
228 static memory_long_double x =
229 { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
230 ASSERT (!isinf (x.value));
232 { /* Unnormalized number. */
233 static memory_long_double x =
234 { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
235 ASSERT (!isinf (x.value));
237 { /* Pseudo-Denormal. */
238 static memory_long_double x =
239 { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
240 ASSERT (!isinf (x.value));