1 /* Test of isnand() substitute.
2 Copyright (C) 2007-2008 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 <blp@cs.stanford.edu>, from code by Bruno
18 Haible <bruno@clisp.org>. */
31 #define ASSERT(expr) \
36 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
47 ASSERT (!isnan (3.141f));
48 ASSERT (!isnan (3.141e30f));
49 ASSERT (!isnan (3.141e-30f));
50 ASSERT (!isnan (-2.718f));
51 ASSERT (!isnan (-2.718e30f));
52 ASSERT (!isnan (-2.718e-30f));
53 ASSERT (!isnan (0.0f));
54 ASSERT (!isnan (-0.0f));
55 /* Infinite values. */
56 ASSERT (!isnan (1.0f / 0.0f));
57 ASSERT (!isnan (-1.0f / 0.0f));
59 ASSERT (isnan (NaNf ()));
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[NWORDSF]; } memory_float;
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 < NWORDSF / 2 ? 1 : - 1)]
72 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
74 if (FLT_EXPBIT0_WORD < NWORDSF / 2)
75 m.word[FLT_EXPBIT0_WORD + 1] |= (unsigned int) 1 << FLT_EXPBIT0_BIT;
77 m.word[0] |= (unsigned int) 1;
78 ASSERT (isnan (m.value));
87 ASSERT (!isnan (3.141));
88 ASSERT (!isnan (3.141e30));
89 ASSERT (!isnan (3.141e-30));
90 ASSERT (!isnan (-2.718));
91 ASSERT (!isnan (-2.718e30));
92 ASSERT (!isnan (-2.718e-30));
93 ASSERT (!isnan (0.0));
94 ASSERT (!isnan (-0.0));
95 /* Infinite values. */
96 ASSERT (!isnan (1.0 / 0.0));
97 ASSERT (!isnan (-1.0 / 0.0));
99 ASSERT (isnan (NaNd ()));
100 #if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT
101 /* Signalling NaN. */
104 ((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
105 typedef union { double value; unsigned int word[NWORDSD]; } memory_double;
108 # if DBL_EXPBIT0_BIT > 0
109 m.word[DBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (DBL_EXPBIT0_BIT - 1);
111 m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDSD / 2 ? 1 : - 1)]
112 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
114 m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDSD / 2 ? 1 : - 1)]
115 |= (unsigned int) 1 << DBL_EXPBIT0_BIT;
116 ASSERT (isnan (m.value));
122 test_long_double (void)
125 ((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
126 typedef union { unsigned int word[NWORDSL]; long double value; }
130 ASSERT (!isnan (3.141L));
131 ASSERT (!isnan (3.141e30L));
132 ASSERT (!isnan (3.141e-30L));
133 ASSERT (!isnan (-2.718L));
134 ASSERT (!isnan (-2.718e30L));
135 ASSERT (!isnan (-2.718e-30L));
136 ASSERT (!isnan (0.0L));
137 ASSERT (!isnan (-0.0L));
138 /* Infinite values. */
139 ASSERT (!isnan (1.0L / 0.0L));
140 ASSERT (!isnan (-1.0L / 0.0L));
142 ASSERT (isnan (0.0L / 0.0L));
144 #if defined LDBL_EXPBIT0_WORD && defined LDBL_EXPBIT0_BIT
145 /* A bit pattern that is different from a Quiet NaN. With a bit of luck,
146 it's a Signalling NaN. */
148 memory_long_double m;
149 m.value = 0.0L / 0.0L;
150 # if LDBL_EXPBIT0_BIT > 0
151 m.word[LDBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (LDBL_EXPBIT0_BIT - 1);
153 m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDSL / 2 ? 1 : - 1)]
154 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
156 m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDSL / 2 ? 1 : - 1)]
157 |= (unsigned int) 1 << LDBL_EXPBIT0_BIT;
158 ASSERT (isnan (m.value));
162 #if ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
163 /* Representation of an 80-bit 'long double' as an initializer for a sequence
164 of 'unsigned int' words. */
165 # ifdef WORDS_BIGENDIAN
166 # define LDBL80_WORDS(exponent,manthi,mantlo) \
167 { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
168 ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16), \
169 (unsigned int) (mantlo) << 16 \
172 # define LDBL80_WORDS(exponent,manthi,mantlo) \
173 { mantlo, manthi, exponent }
176 static memory_long_double x =
177 { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
178 ASSERT (isnan (x.value));
181 /* Signalling NaN. */
182 static memory_long_double x =
183 { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
184 ASSERT (isnan (x.value));
186 /* The isnan function should recognize Pseudo-NaNs, Pseudo-Infinities,
187 Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in
188 Intel IA-64 Architecture Software Developer's Manual, Volume 1:
189 Application Architecture.
190 Table 5-2 "Floating-Point Register Encodings"
191 Figure 5-6 "Memory to Floating-Point Register Data Translation"
194 static memory_long_double x =
195 { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
196 ASSERT (isnan (x.value));
198 { /* Pseudo-Infinity. */
199 static memory_long_double x =
200 { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
201 ASSERT (isnan (x.value));
204 static memory_long_double x =
205 { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
206 ASSERT (isnan (x.value));
208 { /* Unnormalized number. */
209 static memory_long_double x =
210 { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
211 ASSERT (isnan (x.value));
213 { /* Pseudo-Denormal. */
214 static memory_long_double x =
215 { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
216 ASSERT (isnan (x.value));