| /*- |
| * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG> |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * $FreeBSD: src/lib/msun/i387/fenv.h,v 1.4 2005/03/17 22:21:46 das Exp $ |
| */ |
| |
| #ifndef _FENV_H_ |
| #define _FENV_H_ |
| |
| #include <sys/cdefs.h> |
| #include <sys/_types.h> |
| |
| __BEGIN_DECLS |
| |
| /* |
| * To preserve binary compatibility with FreeBSD 5.3, we pack the |
| * mxcsr into some reserved fields, rather than changing sizeof(fenv_t). |
| */ |
| typedef struct { |
| __uint16_t __control; |
| __uint16_t __mxcsr_hi; |
| __uint16_t __status; |
| __uint16_t __mxcsr_lo; |
| __uint32_t __tag; |
| char __other[16]; |
| } fenv_t; |
| |
| typedef __uint16_t fexcept_t; |
| |
| /* Exception flags */ |
| #define FE_INVALID 0x01 |
| #define FE_DENORMAL 0x02 |
| #define FE_DIVBYZERO 0x04 |
| #define FE_OVERFLOW 0x08 |
| #define FE_UNDERFLOW 0x10 |
| #define FE_INEXACT 0x20 |
| #define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_DENORMAL | FE_INEXACT | \ |
| FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW) |
| |
| /* Rounding modes */ |
| #define FE_TONEAREST 0x0000 |
| #define FE_DOWNWARD 0x0400 |
| #define FE_UPWARD 0x0800 |
| #define FE_TOWARDZERO 0x0c00 |
| #define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \ |
| FE_UPWARD | FE_TOWARDZERO) |
| |
| /* Default floating-point environment */ |
| extern const fenv_t __fe_dfl_env; |
| #define FE_DFL_ENV (&__fe_dfl_env) |
| |
| /* C99 floating-point exception functions */ |
| int feclearexcept(int excepts); |
| int fegetexceptflag(fexcept_t *flagp, int excepts); |
| int fesetexceptflag(const fexcept_t *flagp, int excepts); |
| /* feraiseexcept does not set the inexact flag on overflow/underflow */ |
| int feraiseexcept(int excepts); |
| int fetestexcept(int excepts); |
| |
| /* C99 rounding control functions */ |
| int fegetround(void); |
| int fesetround(int round); |
| |
| /* C99 floating-point environment functions */ |
| int fegetenv(fenv_t *__envp); |
| int feholdexcept(fenv_t *__envp); |
| int fesetenv(const fenv_t *envp); |
| int feupdateenv(const fenv_t *__envp); |
| |
| #if __BSD_VISIBLE |
| /* Additional support functions to set/query floating point traps */ |
| int feenableexcept(int __mask); |
| int fedisableexcept(int __mask); |
| int fegetexcept(void); |
| |
| #endif /* __BSD_VISIBLE */ |
| |
| __END_DECLS |
| |
| #endif /* !_FENV_H_ */ |
