newlib/libc/machine/arm/sys/fenv.h

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2004-2005 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  * $FreeBSD$
  29  */
  30
  31 #ifndef _SYS_FENV_H_
  32 #define _SYS_FENV_H_ 1
  33
  34 #include <sys/_types.h>
  35 #include <sys/cdefs.h>
  36
  37 #ifdef __cplusplus
  38 extern "C" {
  39 #endif
  40
  41 typedef int fenv_t;
  42 typedef int fexcept_t;
  43
  44 /* Exception flags */
  45 #define FE_INVALID      0x0001
  46 #define FE_DIVBYZERO    0x0002
  47 #define FE_OVERFLOW     0x0004
  48 #define FE_UNDERFLOW    0x0008
  49 #define FE_INEXACT      0x0010
  50 #ifndef __SOFTFP__
  51 #define FE_DENORMAL     0x0080
  52 #define FE_ALL_EXCEPT   (FE_DIVBYZERO | FE_INEXACT | \
  53                          FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW | FE_DENORMAL)
  54 #else
  55 #define FE_ALL_EXCEPT   (FE_DIVBYZERO | FE_INEXACT | \
  56                          FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
  57 #endif
  58
  59 /* Rounding modes */
  60 #define FE_TONEAREST            0x00000000
  61 #define FE_UPWARD               0x00400000
  62 #define FE_DOWNWARD             0x00800000
  63 #define FE_TOWARDZERO           0x00c00000
  64
  65 /* Default floating-point environment */
  66 extern const fenv_t     *_fe_dfl_env;
  67 #define FE_DFL_ENV      (_fe_dfl_env)
  68
  69 int feclearexcept(int);
  70 int fegetexceptflag(fexcept_t *, int);
  71 int fesetexceptflag(const fexcept_t *, int);
  72 int feraiseexcept(int);
  73 int fetestexcept(int);
  74 int fegetround(void);
  75 int fesetround(int);
  76 int fegetenv(fenv_t *);
  77 int feholdexcept(fenv_t *);
  78 int fesetenv(const fenv_t *);
  79 int feupdateenv(const fenv_t *);
  80 #if __BSD_VISIBLE
  81 int feenableexcept(int);
  82 int fedisableexcept(int);
  83 int fegetexcept(void);
  84 #endif /* __BSD_VISIBLE */
  85
  86 #ifdef __cplusplus
  87 }
  88 #endif
  89
  90 #endif  /* _SYS_FENV_H_ */