1 /* $NetBSD: fenv.c,v 1.3 2017/03/23 18:27:29 chs Exp $ */
2
3 /*-
4 * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: releng/10.1/lib/msun/ia64/fenv.c 226415 2011-10-16 05:37:56Z das $
29 */
30
31 #include <sys/cdefs.h>
32 __RCSID("$NetBSD: fenv.c,v 1.3 2017/03/23 18:27:29 chs Exp $");
33
34 #include "namespace.h"
35
36 #define __fenv_static
37 #include <fenv.h>
38
39 #ifdef __weak_alias
40 __weak_alias(feclearexcept,_feclearexcept)
41 __weak_alias(fedisableexcept,_fedisableexcept)
42 __weak_alias(feenableexcept,_feenableexcept)
43 __weak_alias(fegetenv,_fegetenv)
44 __weak_alias(fegetexcept,_fegetexcept)
45 __weak_alias(fegetexceptflag,_fegetexceptflag)
46 __weak_alias(fegetround,_fegetround)
47 __weak_alias(feholdexcept,_feholdexcept)
48 __weak_alias(feraiseexcept,_feraiseexcept)
49 __weak_alias(fesetenv,_fesetenv)
50 __weak_alias(fesetexceptflag,_fesetexceptflag)
51 __weak_alias(fesetround,_fesetround)
52 __weak_alias(fetestexcept,_fetestexcept)
53 __weak_alias(feupdateenv,_feupdateenv)
54 #endif
55
56 #if defined(__GNUC_GNU_INLINE__) && !defined(__lint__)
57 #error "This file must be compiled with C99 'inline' semantics"
58 #endif
59
60 const fenv_t __fe_dfl_env = 0x0009804c8a70033fULL;
61
62 extern inline int feclearexcept(int __excepts);
63 extern inline int fegetexceptflag(fexcept_t *__flagp, int __excepts);
64 extern inline int fesetexceptflag(const fexcept_t *__flagp, int __excepts);
65 extern inline int feraiseexcept(int __excepts);
66 extern inline int fetestexcept(int __excepts);
67 extern inline int fegetround(void);
68 extern inline int fesetround(int __round);
69 extern inline int fegetenv(fenv_t *__envp);
70 extern inline int feholdexcept(fenv_t *__envp);
71 extern inline int fesetenv(const fenv_t *__envp);
72 extern inline int feenableexcept(int __excepts);
73 extern inline int fedisableexcept(int __excepts);
74 extern inline int fegetexcept(void);
75
76 /*
77 * It doesn't pay to inline feupdateenv() because it includes one of
78 * the rare uses of feraiseexcept() where the argument is not a
79 * constant. Thus, no dead code elimination can occur, resulting in
80 * significant bloat.
81 */
82 int
feupdateenv(const fenv_t * envp)83 feupdateenv(const fenv_t *envp)
84 {
85 fenv_t fpsr;
86
87 __stfpsr(&fpsr);
88 __ldfpsr(*envp);
89 feraiseexcept((fpsr >> _FPUSW_SHIFT) & FE_ALL_EXCEPT);
90 return (0);
91 }
92