1 /* Test of isnand() 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 <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 IRIX cc can't put -0.0L into .data, but can compute at runtime.
54 Note that the expression -LDBL_MIN * LDBL_MIN does not work on other
55 platforms, such as when cross-compiling to PowerPC on MacOS X 10.5. */
56 #if defined __hpux || defined __sgi
58 compute_minus_zerol (void)
60 return -LDBL_MIN * LDBL_MIN;
62 # define minus_zerol compute_minus_zerol ()
64 long double minus_zerol = -0.0L;
71 ASSERT (!isnan (3.141f));
72 ASSERT (!isnan (3.141e30f));
73 ASSERT (!isnan (3.141e-30f));
74 ASSERT (!isnan (-2.718f));
75 ASSERT (!isnan (-2.718e30f));
76 ASSERT (!isnan (-2.718e-30f));
77 ASSERT (!isnan (0.0f));
78 ASSERT (!isnan (-zerof));
79 /* Infinite values. */
80 ASSERT (!isnan (1.0f / 0.0f));
81 ASSERT (!isnan (-1.0f / 0.0f));
83 ASSERT (isnan (NaNf ()));
84 #if defined FLT_EXPBIT0_WORD && defined FLT_EXPBIT0_BIT
88 ((sizeof (float) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
89 typedef union { float value; unsigned int word[NWORDSF]; } memory_float;
92 # if FLT_EXPBIT0_BIT > 0
93 m.word[FLT_EXPBIT0_WORD] ^= (unsigned int) 1 << (FLT_EXPBIT0_BIT - 1);
95 m.word[FLT_EXPBIT0_WORD + (FLT_EXPBIT0_WORD < NWORDSF / 2 ? 1 : - 1)]
96 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
98 if (FLT_EXPBIT0_WORD < NWORDSF / 2)
99 m.word[FLT_EXPBIT0_WORD + 1] |= (unsigned int) 1 << FLT_EXPBIT0_BIT;
101 m.word[0] |= (unsigned int) 1;
102 ASSERT (isnan (m.value));
111 ASSERT (!isnan (3.141));
112 ASSERT (!isnan (3.141e30));
113 ASSERT (!isnan (3.141e-30));
114 ASSERT (!isnan (-2.718));
115 ASSERT (!isnan (-2.718e30));
116 ASSERT (!isnan (-2.718e-30));
117 ASSERT (!isnan (0.0));
118 ASSERT (!isnan (-zerod));
119 /* Infinite values. */
120 ASSERT (!isnan (1.0 / 0.0));
121 ASSERT (!isnan (-1.0 / 0.0));
123 ASSERT (isnan (NaNd ()));
124 #if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT
125 /* Signalling NaN. */
128 ((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
129 typedef union { double value; unsigned int word[NWORDSD]; } memory_double;
132 # if DBL_EXPBIT0_BIT > 0
133 m.word[DBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (DBL_EXPBIT0_BIT - 1);
135 m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDSD / 2 ? 1 : - 1)]
136 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
138 m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDSD / 2 ? 1 : - 1)]
139 |= (unsigned int) 1 << DBL_EXPBIT0_BIT;
140 ASSERT (isnan (m.value));
146 test_long_double (void)
149 ((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
150 typedef union { unsigned int word[NWORDSL]; long double value; }
154 ASSERT (!isnan (3.141L));
155 ASSERT (!isnan (3.141e30L));
156 ASSERT (!isnan (3.141e-30L));
157 ASSERT (!isnan (-2.718L));
158 ASSERT (!isnan (-2.718e30L));
159 ASSERT (!isnan (-2.718e-30L));
160 ASSERT (!isnan (0.0L));
161 ASSERT (!isnan (minus_zerol));
162 /* Infinite values. */
163 ASSERT (!isnan (1.0L / 0.0L));
164 ASSERT (!isnan (-1.0L / 0.0L));
166 ASSERT (isnan (NaNl ()));
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;
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 < NWORDSL / 2 ? 1 : - 1)]
178 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
180 m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDSL / 2 ? 1 : - 1)]
181 |= (unsigned int) 1 << LDBL_EXPBIT0_BIT;
182 ASSERT (isnan (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 (isnan (x.value));
205 /* Signalling NaN. */
206 static memory_long_double x =
207 { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
208 ASSERT (isnan (x.value));
210 /* The isnan 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 (isnan (x.value));
222 { /* Pseudo-Infinity. */
223 static memory_long_double x =
224 { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
225 ASSERT (isnan (x.value));
228 static memory_long_double x =
229 { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
230 ASSERT (isnan (x.value));
232 { /* Unnormalized number. */
233 static memory_long_double x =
234 { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
235 ASSERT (isnan (x.value));
237 { /* Pseudo-Denormal. */
238 static memory_long_double x =
239 { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
240 ASSERT (isnan (x.value));