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2aa62f2b | 1 | /* $NetBSD: isinff_ieee754.c,v 1.1 2004/03/04 23:42:39 kleink Exp $ */\r |
2 | \r | |
3 | /*\r | |
4 | * Copyright (c) 1992, 1993\r | |
5 | * The Regents of the University of California. All rights reserved.\r | |
6 | *\r | |
7 | * This software was developed by the Computer Systems Engineering group\r | |
8 | * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and\r | |
9 | * contributed to Berkeley.\r | |
10 | *\r | |
11 | * Redistribution and use in source and binary forms, with or without\r | |
12 | * modification, are permitted provided that the following conditions\r | |
13 | * are met:\r | |
14 | * 1. Redistributions of source code must retain the above copyright\r | |
15 | * notice, this list of conditions and the following disclaimer.\r | |
16 | * 2. Redistributions in binary form must reproduce the above copyright\r | |
17 | * notice, this list of conditions and the following disclaimer in the\r | |
18 | * documentation and/or other materials provided with the distribution.\r | |
19 | * 3. Neither the name of the University nor the names of its contributors\r | |
20 | * may be used to endorse or promote products derived from this software\r | |
21 | * without specific prior written permission.\r | |
22 | *\r | |
23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r | |
24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r | |
25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r | |
26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r | |
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r | |
28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r | |
29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r | |
30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r | |
31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r | |
32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r | |
33 | * SUCH DAMAGE.\r | |
34 | *\r | |
35 | * from: Header: isinf.c,v 1.1 91/07/08 19:03:34 torek Exp\r | |
36 | */\r | |
37 | #include <LibConfig.h>\r | |
38 | #include <sys/EfiCdefs.h>\r | |
39 | #if defined(LIBC_SCCS) && !defined(lint)\r | |
40 | #if 0\r | |
41 | static char sccsid[] = "@(#)isinf.c 8.1 (Berkeley) 6/4/93";\r | |
42 | #else\r | |
43 | __RCSID("$NetBSD: isinff_ieee754.c,v 1.1 2004/03/04 23:42:39 kleink Exp $");\r | |
44 | #endif\r | |
45 | #endif /* LIBC_SCCS and not lint */\r | |
46 | \r | |
47 | #include <machine/ieee.h>\r | |
48 | #include <math.h>\r | |
49 | \r | |
50 | /*\r | |
51 | * 7.12.3.3 isinf - test for infinity\r | |
52 | * IEEE 754 single-precision version\r | |
53 | */\r | |
54 | int\r | |
55 | __isinff(float x)\r | |
56 | {\r | |
57 | union ieee_single_u u;\r | |
58 | \r | |
59 | u.sngu_f = x;\r | |
60 | \r | |
61 | return (u.sngu_sng.sng_exp == SNG_EXP_INFNAN &&\r | |
62 | u.sngu_sng.sng_frac == 0);\r | |
63 | }\r |