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fenv.h revision 1.26 
      1 /*	$NetBSD: fenv.h,v 1.26 2017/04/09 15:29:07 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(__vax__)
     33 # ifndef __TEST_FENV
     34 #  error	"fenv.h is currently not supported for this architecture"
     35 # endif
     36 typedef int fexcept_t;
     37 typedef int fenv_t;
     38 #else
     39 # define __HAVE_FENV
     40 # include <machine/fenv.h>
     41 #endif
     42 
     43 #if \
     44 	(defined(__arm__) && defined(__SOFTFP__)) || \
     45 	(defined(__m68k__) && !defined(__HAVE_68881__)) || \
     46 	defined(__mips_soft_float) || \
     47 	(defined(__powerpc__) && defined(_SOFT_FLOAT)) || \
     48 	(defined(__sh__) && !defined(__SH_FPU_ANY__)) || \
     49 	0
     50 
     51 /*
     52  * Common definitions for softfloat.
     53  */
     54 
     55 #ifndef __HAVE_FENV_SOFTFLOAT_DEFS
     56 
     57 typedef int fexcept_t;
     58 
     59 typedef struct {
     60 	int	__flags;
     61 	int	__mask;
     62 	int	__round;
     63 } fenv_t;
     64 
     65 #define __FENV_GET_FLAGS(__envp)	(__envp)->__flags
     66 #define __FENV_GET_MASK(__envp)		(__envp)->__mask
     67 #define __FENV_GET_ROUND(__envp)	(__envp)->__round
     68 #define __FENV_SET_FLAGS(__envp, __val) \
     69 	(__envp)->__flags = (__val)
     70 #define __FENV_SET_MASK(__envp, __val) \
     71 	(__envp)->__mask = (__val)
     72 #define __FENV_SET_ROUND(__envp, __val) \
     73 	(__envp)->__round = (__val)
     74 
     75 #endif /* __FENV_GET_FLAGS */
     76 
     77 #endif /* softfloat */
     78 
     79 __BEGIN_DECLS
     80 
     81 /* Function prototypes */
     82 int	feclearexcept(int);
     83 int	fegetexceptflag(fexcept_t *, int);
     84 int	feraiseexcept(int);
     85 int	fesetexceptflag(const fexcept_t *, int);
     86 int	fetestexcept(int);
     87 int	fegetround(void);
     88 int	fesetround(int);
     89 int	fegetenv(fenv_t *);
     90 int	feholdexcept(fenv_t *);
     91 int	fesetenv(const fenv_t *);
     92 int	feupdateenv(const fenv_t *);
     93 
     94 #if defined(_NETBSD_SOURCE) || defined(_GNU_SOURCE)
     95 
     96 int	feenableexcept(int);
     97 int	fedisableexcept(int);
     98 int	fegetexcept(void);
     99 
    100 #endif /* _NETBSD_SOURCE || _GNU_SOURCE */
    101 
    102 __END_DECLS
    103 
    104 #endif /* ! _FENV_H_ */
    105