1 /* Test of isnand() substitute.
2 Copyright (C) 2007-2012 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"
41 ASSERT (!isnan (3.141f));
42 ASSERT (!isnan (3.141e30f));
43 ASSERT (!isnan (3.141e-30f));
44 ASSERT (!isnan (-2.718f));
45 ASSERT (!isnan (-2.718e30f));
46 ASSERT (!isnan (-2.718e-30f));
47 ASSERT (!isnan (0.0f));
48 ASSERT (!isnan (minus_zerof));
49 /* Infinite values. */
50 ASSERT (!isnan (Infinityf ()));
51 ASSERT (!isnan (- Infinityf ()));
53 ASSERT (isnan (NaNf ()));
54 #if defined FLT_EXPBIT0_WORD && defined FLT_EXPBIT0_BIT
58 ((sizeof (float) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
59 typedef union { float value; unsigned int word[NWORDSF]; } memory_float;
62 # if FLT_EXPBIT0_BIT > 0
63 m.word[FLT_EXPBIT0_WORD] ^= (unsigned int) 1 << (FLT_EXPBIT0_BIT - 1);
65 m.word[FLT_EXPBIT0_WORD + (FLT_EXPBIT0_WORD < NWORDSF / 2 ? 1 : - 1)]
66 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
68 if (FLT_EXPBIT0_WORD < NWORDSF / 2)
69 m.word[FLT_EXPBIT0_WORD + 1] |= (unsigned int) 1 << FLT_EXPBIT0_BIT;
71 m.word[0] |= (unsigned int) 1;
72 ASSERT (isnan (m.value));
81 ASSERT (!isnan (3.141));
82 ASSERT (!isnan (3.141e30));
83 ASSERT (!isnan (3.141e-30));
84 ASSERT (!isnan (-2.718));
85 ASSERT (!isnan (-2.718e30));
86 ASSERT (!isnan (-2.718e-30));
87 ASSERT (!isnan (0.0));
88 ASSERT (!isnan (minus_zerod));
89 /* Infinite values. */
90 ASSERT (!isnan (Infinityd ()));
91 ASSERT (!isnan (- Infinityd ()));
93 ASSERT (isnan (NaNd ()));
94 #if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT
98 ((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
99 typedef union { double value; unsigned int word[NWORDSD]; } memory_double;
102 # if DBL_EXPBIT0_BIT > 0
103 m.word[DBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (DBL_EXPBIT0_BIT - 1);
105 m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDSD / 2 ? 1 : - 1)]
106 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
108 m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDSD / 2 ? 1 : - 1)]
109 |= (unsigned int) 1 << DBL_EXPBIT0_BIT;
110 ASSERT (isnan (m.value));
116 test_long_double (void)
119 ((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
120 typedef union { unsigned int word[NWORDSL]; long double value; }
124 ASSERT (!isnan (3.141L));
125 ASSERT (!isnan (3.141e30L));
126 ASSERT (!isnan (3.141e-30L));
127 ASSERT (!isnan (-2.718L));
128 ASSERT (!isnan (-2.718e30L));
129 ASSERT (!isnan (-2.718e-30L));
130 ASSERT (!isnan (0.0L));
131 ASSERT (!isnan (minus_zerol));
132 /* Infinite values. */
133 ASSERT (!isnan (Infinityl ()));
134 ASSERT (!isnan (- Infinityl ()));
136 ASSERT (isnan (NaNl ()));
138 #if defined LDBL_EXPBIT0_WORD && defined LDBL_EXPBIT0_BIT
139 /* A bit pattern that is different from a Quiet NaN. With a bit of luck,
140 it's a Signalling NaN. */
142 memory_long_double m;
144 # if LDBL_EXPBIT0_BIT > 0
145 m.word[LDBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (LDBL_EXPBIT0_BIT - 1);
147 m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDSL / 2 ? 1 : - 1)]
148 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
150 m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDSL / 2 ? 1 : - 1)]
151 |= (unsigned int) 1 << LDBL_EXPBIT0_BIT;
152 ASSERT (isnan (m.value));
156 #if ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_)) && !HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
157 /* Representation of an 80-bit 'long double' as an initializer for a sequence
158 of 'unsigned int' words. */
159 # ifdef WORDS_BIGENDIAN
160 # define LDBL80_WORDS(exponent,manthi,mantlo) \
161 { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
162 ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16), \
163 (unsigned int) (mantlo) << 16 \
166 # define LDBL80_WORDS(exponent,manthi,mantlo) \
167 { mantlo, manthi, exponent }
170 static memory_long_double x =
171 { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
172 ASSERT (isnan (x.value));
175 /* Signalling NaN. */
176 static memory_long_double x =
177 { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
178 ASSERT (isnan (x.value));
180 /* The isnan function should recognize Pseudo-NaNs, Pseudo-Infinities,
181 Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in
182 Intel IA-64 Architecture Software Developer's Manual, Volume 1:
183 Application Architecture.
184 Table 5-2 "Floating-Point Register Encodings"
185 Figure 5-6 "Memory to Floating-Point Register Data Translation"
188 static memory_long_double x =
189 { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
190 ASSERT (isnan (x.value));
192 { /* Pseudo-Infinity. */
193 static memory_long_double x =
194 { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
195 ASSERT (isnan (x.value));
198 static memory_long_double x =
199 { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
200 ASSERT (isnan (x.value));
202 { /* Unnormalized number. */
203 static memory_long_double x =
204 { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
205 ASSERT (isnan (x.value));
207 { /* Pseudo-Denormal. */
208 static memory_long_double x =
209 { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
210 ASSERT (isnan (x.value));