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__); \
43 /* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0f.
44 So we use -zero instead. */
47 /* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
48 So we use -zero instead. */
51 /* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
52 So we use minus_zerol instead.
53 Note that the expression -LDBL_MIN * LDBL_MIN does not work on other
54 platforms, such as when cross-compiling to PowerPC on MacOS X 10.5. */
55 #if defined __hpux || defined __sgi
56 long double minus_zerol = -LDBL_MIN * LDBL_MIN;
58 long double minus_zerol = -0.0L;
65 ASSERT (!isnan (3.141f));
66 ASSERT (!isnan (3.141e30f));
67 ASSERT (!isnan (3.141e-30f));
68 ASSERT (!isnan (-2.718f));
69 ASSERT (!isnan (-2.718e30f));
70 ASSERT (!isnan (-2.718e-30f));
71 ASSERT (!isnan (0.0f));
72 ASSERT (!isnan (-zerof));
73 /* Infinite values. */
74 ASSERT (!isnan (1.0f / 0.0f));
75 ASSERT (!isnan (-1.0f / 0.0f));
77 ASSERT (isnan (NaNf ()));
78 #if defined FLT_EXPBIT0_WORD && defined FLT_EXPBIT0_BIT
82 ((sizeof (float) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
83 typedef union { float value; unsigned int word[NWORDSF]; } memory_float;
86 # if FLT_EXPBIT0_BIT > 0
87 m.word[FLT_EXPBIT0_WORD] ^= (unsigned int) 1 << (FLT_EXPBIT0_BIT - 1);
89 m.word[FLT_EXPBIT0_WORD + (FLT_EXPBIT0_WORD < NWORDSF / 2 ? 1 : - 1)]
90 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
92 if (FLT_EXPBIT0_WORD < NWORDSF / 2)
93 m.word[FLT_EXPBIT0_WORD + 1] |= (unsigned int) 1 << FLT_EXPBIT0_BIT;
95 m.word[0] |= (unsigned int) 1;
96 ASSERT (isnan (m.value));
105 ASSERT (!isnan (3.141));
106 ASSERT (!isnan (3.141e30));
107 ASSERT (!isnan (3.141e-30));
108 ASSERT (!isnan (-2.718));
109 ASSERT (!isnan (-2.718e30));
110 ASSERT (!isnan (-2.718e-30));
111 ASSERT (!isnan (0.0));
112 ASSERT (!isnan (-zerod));
113 /* Infinite values. */
114 ASSERT (!isnan (1.0 / 0.0));
115 ASSERT (!isnan (-1.0 / 0.0));
117 ASSERT (isnan (NaNd ()));
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[NWORDSD]; } memory_double;
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 < NWORDSD / 2 ? 1 : - 1)]
130 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
132 m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDSD / 2 ? 1 : - 1)]
133 |= (unsigned int) 1 << DBL_EXPBIT0_BIT;
134 ASSERT (isnan (m.value));
140 test_long_double (void)
143 ((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
144 typedef union { unsigned int word[NWORDSL]; long double value; }
148 ASSERT (!isnan (3.141L));
149 ASSERT (!isnan (3.141e30L));
150 ASSERT (!isnan (3.141e-30L));
151 ASSERT (!isnan (-2.718L));
152 ASSERT (!isnan (-2.718e30L));
153 ASSERT (!isnan (-2.718e-30L));
154 ASSERT (!isnan (0.0L));
155 ASSERT (!isnan (minus_zerol));
156 /* Infinite values. */
157 ASSERT (!isnan (1.0L / 0.0L));
158 ASSERT (!isnan (-1.0L / 0.0L));
160 ASSERT (isnan (0.0L / 0.0L));
162 #if defined LDBL_EXPBIT0_WORD && defined LDBL_EXPBIT0_BIT
163 /* A bit pattern that is different from a Quiet NaN. With a bit of luck,
164 it's a Signalling NaN. */
166 memory_long_double m;
167 m.value = 0.0L / 0.0L;
168 # if LDBL_EXPBIT0_BIT > 0
169 m.word[LDBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (LDBL_EXPBIT0_BIT - 1);
171 m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDSL / 2 ? 1 : - 1)]
172 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
174 m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDSL / 2 ? 1 : - 1)]
175 |= (unsigned int) 1 << LDBL_EXPBIT0_BIT;
176 ASSERT (isnan (m.value));
180 #if ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
181 /* Representation of an 80-bit 'long double' as an initializer for a sequence
182 of 'unsigned int' words. */
183 # ifdef WORDS_BIGENDIAN
184 # define LDBL80_WORDS(exponent,manthi,mantlo) \
185 { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
186 ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16), \
187 (unsigned int) (mantlo) << 16 \
190 # define LDBL80_WORDS(exponent,manthi,mantlo) \
191 { mantlo, manthi, exponent }
194 static memory_long_double x =
195 { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
196 ASSERT (isnan (x.value));
199 /* Signalling NaN. */
200 static memory_long_double x =
201 { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
202 ASSERT (isnan (x.value));
204 /* The isnan function should recognize Pseudo-NaNs, Pseudo-Infinities,
205 Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in
206 Intel IA-64 Architecture Software Developer's Manual, Volume 1:
207 Application Architecture.
208 Table 5-2 "Floating-Point Register Encodings"
209 Figure 5-6 "Memory to Floating-Point Register Data Translation"
212 static memory_long_double x =
213 { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
214 ASSERT (isnan (x.value));
216 { /* Pseudo-Infinity. */
217 static memory_long_double x =
218 { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
219 ASSERT (isnan (x.value));
222 static memory_long_double x =
223 { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
224 ASSERT (isnan (x.value));
226 { /* Unnormalized number. */
227 static memory_long_double x =
228 { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
229 ASSERT (isnan (x.value));
231 { /* Pseudo-Denormal. */
232 static memory_long_double x =
233 { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
234 ASSERT (isnan (x.value));