| Dan Albert | 287553d | 2017-02-16 10:47:51 -0800 | [diff] [blame] | 1 | /*- |
| 2 | * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG> |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * |
| 14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 24 | * SUCH DAMAGE. |
| 25 | * |
| 26 | * $FreeBSD: src/lib/msun/i387/fenv.h,v 1.4 2005/03/17 22:21:46 das Exp $ |
| 27 | */ |
| 28 | |
| 29 | #ifndef _FENV_H_ |
| 30 | #define _FENV_H_ |
| 31 | |
| 32 | #include <sys/types.h> |
| 33 | |
| 34 | __BEGIN_DECLS |
| 35 | |
| 36 | /* |
| 37 | * To preserve binary compatibility with FreeBSD 5.3, we pack the |
| 38 | * mxcsr into some reserved fields, rather than changing sizeof(fenv_t). |
| 39 | */ |
| 40 | typedef struct { |
| 41 | __uint16_t __control; |
| 42 | __uint16_t __mxcsr_hi; |
| 43 | __uint16_t __status; |
| 44 | __uint16_t __mxcsr_lo; |
| 45 | __uint32_t __tag; |
| 46 | char __other[16]; |
| 47 | } fenv_t; |
| 48 | |
| 49 | typedef __uint16_t fexcept_t; |
| 50 | |
| 51 | /* Exception flags */ |
| 52 | #define FE_INVALID 0x01 |
| 53 | #define FE_DENORMAL 0x02 |
| 54 | #define FE_DIVBYZERO 0x04 |
| 55 | #define FE_OVERFLOW 0x08 |
| 56 | #define FE_UNDERFLOW 0x10 |
| 57 | #define FE_INEXACT 0x20 |
| 58 | #define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_DENORMAL | FE_INEXACT | \ |
| 59 | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW) |
| 60 | |
| 61 | /* Rounding modes */ |
| 62 | #define FE_TONEAREST 0x0000 |
| 63 | #define FE_DOWNWARD 0x0400 |
| 64 | #define FE_UPWARD 0x0800 |
| 65 | #define FE_TOWARDZERO 0x0c00 |
| 66 | #define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \ |
| 67 | FE_UPWARD | FE_TOWARDZERO) |
| 68 | |
| 69 | /* Default floating-point environment */ |
| 70 | extern const fenv_t __fe_dfl_env; |
| 71 | #define FE_DFL_ENV (&__fe_dfl_env) |
| 72 | |
| 73 | /* C99 floating-point exception functions */ |
| 74 | int feclearexcept(int excepts); |
| 75 | int fegetexceptflag(fexcept_t *flagp, int excepts); |
| 76 | int fesetexceptflag(const fexcept_t *flagp, int excepts); |
| 77 | /* feraiseexcept does not set the inexact flag on overflow/underflow */ |
| 78 | int feraiseexcept(int excepts); |
| 79 | int fetestexcept(int excepts); |
| 80 | |
| 81 | /* C99 rounding control functions */ |
| 82 | int fegetround(void); |
| 83 | int fesetround(int round); |
| 84 | |
| 85 | /* C99 floating-point environment functions */ |
| 86 | int fegetenv(fenv_t *__envp); |
| 87 | int feholdexcept(fenv_t *__envp); |
| 88 | int fesetenv(const fenv_t *envp); |
| 89 | int feupdateenv(const fenv_t *__envp); |
| 90 | |
| 91 | #if __BSD_VISIBLE |
| 92 | /* Additional support functions to set/query floating point traps */ |
| 93 | int feenableexcept(int __mask); |
| 94 | int fedisableexcept(int __mask); |
| 95 | int fegetexcept(void); |
| 96 | |
| 97 | #endif /* __BSD_VISIBLE */ |
| 98 | |
| 99 | __END_DECLS |
| 100 | |
| 101 | #endif /* !_FENV_H_ */ |