1 /* Test of isnanl() 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 Bruno Haible <bruno@clisp.org>, 2007. */
22 #include "minus-zero.h"
30 ((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
31 typedef union { unsigned int word[NWORDS]; long double value; }
35 ASSERT (!isnanl (3.141L));
36 ASSERT (!isnanl (3.141e30L));
37 ASSERT (!isnanl (3.141e-30L));
38 ASSERT (!isnanl (-2.718L));
39 ASSERT (!isnanl (-2.718e30L));
40 ASSERT (!isnanl (-2.718e-30L));
41 ASSERT (!isnanl (0.0L));
42 ASSERT (!isnanl (minus_zerol));
43 /* Infinite values. */
44 ASSERT (!isnanl (1.0L / 0.0L));
45 ASSERT (!isnanl (-1.0L / 0.0L));
47 ASSERT (isnanl (NaNl ()));
49 #if defined LDBL_EXPBIT0_WORD && defined LDBL_EXPBIT0_BIT
50 /* A bit pattern that is different from a Quiet NaN. With a bit of luck,
51 it's a Signalling NaN. */
55 # if LDBL_EXPBIT0_BIT > 0
56 m.word[LDBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (LDBL_EXPBIT0_BIT - 1);
58 m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
59 ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
61 m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
62 |= (unsigned int) 1 << LDBL_EXPBIT0_BIT;
63 ASSERT (isnanl (m.value));
67 #if ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
68 /* Representation of an 80-bit 'long double' as an initializer for a sequence
69 of 'unsigned int' words. */
70 # ifdef WORDS_BIGENDIAN
71 # define LDBL80_WORDS(exponent,manthi,mantlo) \
72 { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
73 ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16), \
74 (unsigned int) (mantlo) << 16 \
77 # define LDBL80_WORDS(exponent,manthi,mantlo) \
78 { mantlo, manthi, exponent }
81 static memory_long_double x =
82 { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
83 ASSERT (isnanl (x.value));
87 static memory_long_double x =
88 { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
89 ASSERT (isnanl (x.value));
91 /* The isnanl function should recognize Pseudo-NaNs, Pseudo-Infinities,
92 Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in
93 Intel IA-64 Architecture Software Developer's Manual, Volume 1:
94 Application Architecture.
95 Table 5-2 "Floating-Point Register Encodings"
96 Figure 5-6 "Memory to Floating-Point Register Data Translation"
99 static memory_long_double x =
100 { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
101 ASSERT (isnanl (x.value));
103 { /* Pseudo-Infinity. */
104 static memory_long_double x =
105 { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
106 ASSERT (isnanl (x.value));
109 static memory_long_double x =
110 { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
111 ASSERT (isnanl (x.value));
113 { /* Unnormalized number. */
114 static memory_long_double x =
115 { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
116 ASSERT (isnanl (x.value));
118 { /* Pseudo-Denormal. */
119 static memory_long_double x =
120 { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
121 ASSERT (isnanl (x.value));