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fenv.h revision 1.17 
      1 /*	$NetBSD: fenv.h,v 1.17 2015/12/24 04:16:00 christos Exp $	*/
      2 /*
      3  * Copyright (c) 2010 The NetBSD Foundation, Inc.
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     16  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     17  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     18  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     19  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     20  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     21  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     22  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     23  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     24  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     25  * POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 #ifndef _FENV_H_
     28 #define _FENV_H_
     29 
     30 #include <sys/featuretest.h>
     31 
     32 #if !defined(__aarch64__) && !defined(__arm__) && !defined(__i386__) \
     33     && !defined(__hppa__) && !defined(__powerpc__) && !defined(__mips__) \
     34     && !defined(__or1k__) && !defined(__riscv__) && !defined(__sparc__) \
     35     && !defined(__x86_64__)
     36 # ifndef __TEST_FENV
     37 #  error	"fenv.h is currently not supported for this architecture"
     38 # endif
     39 #else
     40 # define __HAVE_FENV
     41 # include <machine/fenv.h>
     42 #endif
     43 
     44 __BEGIN_DECLS
     45 
     46 /* Function prototypes */
     47 int	feclearexcept(int);
     48 int	fegetexceptflag(fexcept_t *, int);
     49 int	feraiseexcept(int);
     50 int	fesetexceptflag(const fexcept_t *, int);
     51 int	fetestexcept(int);
     52 int	fegetround(void);
     53 int	fesetround(int);
     54 int	fegetenv(fenv_t *);
     55 int	feholdexcept(fenv_t *);
     56 int	fesetenv(const fenv_t *);
     57 int	feupdateenv(const fenv_t *);
     58 
     59 #if defined(_NETBSD_SOURCE) || defined(_GNU_SOURCE)
     60 
     61 int	feenableexcept(int mask);
     62 int	fedisableexcept(int mask);
     63 int	fegetexcept(void);
     64 
     65 #endif /* _NETBSD_SOURCE || _GNU_SOURCE */
     66 
     67 __END_DECLS
     68 
     69 #endif /* ! _FENV_H_ */
     70