1 /* Test of isnand() 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 <blp@cs.stanford.edu>, from code by Bruno
18 Haible <bruno@clisp.org>. */
24 /* isnan must be a macro. */
26 # error missing declaration
32 #include "minus-zero.h"
40 ASSERT (!isnan (3.141f));
41 ASSERT (!isnan (3.141e30f));
42 ASSERT (!isnan (3.141e-30f));
43 ASSERT (!isnan (-2.718f));
44 ASSERT (!isnan (-2.718e30f));
45 ASSERT (!isnan (-2.718e-30f));
46 ASSERT (!isnan (0.0f));
47 ASSERT (!isnan (minus_zerof));
48 /* Infinite values. */
49 ASSERT (!isnan (1.0f / 0.0f));
50 ASSERT (!isnan (-1.0f / 0.0f));
52 ASSERT (isnan (NaNf ()));
53 #if defined FLT_EXPBIT0_WORD && defined FLT_EXPBIT0_BIT
57 ((sizeof (float) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
58 typedef union { float value; unsigned int word[NWORDSF]; } memory_float;
61 # if FLT_EXPBIT0_BIT > 0
62 m.word[FLT_EXPBIT0_WORD] ^= (unsigned int) 1 << (FLT_EXPBIT0_BIT - 1);
64 m.word[FLT_EXPBIT0_WORD + (FLT_EXPBIT0_WORD < NWORDSF / 2 ? 1 : - 1)]
65 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
67 if (FLT_EXPBIT0_WORD < NWORDSF / 2)
68 m.word[FLT_EXPBIT0_WORD + 1] |= (unsigned int) 1 << FLT_EXPBIT0_BIT;
70 m.word[0] |= (unsigned int) 1;
71 ASSERT (isnan (m.value));
80 ASSERT (!isnan (3.141));
81 ASSERT (!isnan (3.141e30));
82 ASSERT (!isnan (3.141e-30));
83 ASSERT (!isnan (-2.718));
84 ASSERT (!isnan (-2.718e30));
85 ASSERT (!isnan (-2.718e-30));
86 ASSERT (!isnan (0.0));
87 ASSERT (!isnan (minus_zerod));
88 /* Infinite values. */
89 ASSERT (!isnan (1.0 / 0.0));
90 ASSERT (!isnan (-1.0 / 0.0));
92 ASSERT (isnan (NaNd ()));
93 #if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT
97 ((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
98 typedef union { double value; unsigned int word[NWORDSD]; } memory_double;
101 # if DBL_EXPBIT0_BIT > 0
102 m.word[DBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (DBL_EXPBIT0_BIT - 1);
104 m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDSD / 2 ? 1 : - 1)]
105 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
107 m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDSD / 2 ? 1 : - 1)]
108 |= (unsigned int) 1 << DBL_EXPBIT0_BIT;
109 ASSERT (isnan (m.value));
115 test_long_double (void)
118 ((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
119 typedef union { unsigned int word[NWORDSL]; long double value; }
123 ASSERT (!isnan (3.141L));
124 ASSERT (!isnan (3.141e30L));
125 ASSERT (!isnan (3.141e-30L));
126 ASSERT (!isnan (-2.718L));
127 ASSERT (!isnan (-2.718e30L));
128 ASSERT (!isnan (-2.718e-30L));
129 ASSERT (!isnan (0.0L));
130 ASSERT (!isnan (minus_zerol));
131 /* Infinite values. */
132 ASSERT (!isnan (1.0L / 0.0L));
133 ASSERT (!isnan (-1.0L / 0.0L));
135 ASSERT (isnan (NaNl ()));
137 #if defined LDBL_EXPBIT0_WORD && defined LDBL_EXPBIT0_BIT
138 /* A bit pattern that is different from a Quiet NaN. With a bit of luck,
139 it's a Signalling NaN. */
141 memory_long_double m;
143 # if LDBL_EXPBIT0_BIT > 0
144 m.word[LDBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (LDBL_EXPBIT0_BIT - 1);
146 m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDSL / 2 ? 1 : - 1)]
147 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
149 m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDSL / 2 ? 1 : - 1)]
150 |= (unsigned int) 1 << LDBL_EXPBIT0_BIT;
151 ASSERT (isnan (m.value));
155 #if ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
156 /* Representation of an 80-bit 'long double' as an initializer for a sequence
157 of 'unsigned int' words. */
158 # ifdef WORDS_BIGENDIAN
159 # define LDBL80_WORDS(exponent,manthi,mantlo) \
160 { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
161 ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16), \
162 (unsigned int) (mantlo) << 16 \
165 # define LDBL80_WORDS(exponent,manthi,mantlo) \
166 { mantlo, manthi, exponent }
169 static memory_long_double x =
170 { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
171 ASSERT (isnan (x.value));
174 /* Signalling NaN. */
175 static memory_long_double x =
176 { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
177 ASSERT (isnan (x.value));
179 /* The isnan function should recognize Pseudo-NaNs, Pseudo-Infinities,
180 Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in
181 Intel IA-64 Architecture Software Developer's Manual, Volume 1:
182 Application Architecture.
183 Table 5-2 "Floating-Point Register Encodings"
184 Figure 5-6 "Memory to Floating-Point Register Data Translation"
187 static memory_long_double x =
188 { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
189 ASSERT (isnan (x.value));
191 { /* Pseudo-Infinity. */
192 static memory_long_double x =
193 { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
194 ASSERT (isnan (x.value));
197 static memory_long_double x =
198 { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
199 ASSERT (isnan (x.value));
201 { /* Unnormalized number. */
202 static memory_long_double x =
203 { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
204 ASSERT (isnan (x.value));
206 { /* Pseudo-Denormal. */
207 static memory_long_double x =
208 { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
209 ASSERT (isnan (x.value));