1 /* Copyright (c) 2011 Tensilica Inc. ALL RIGHTS RESERVED. 2 3 Redistribution and use in source and binary forms, with or without 4 modification, are permitted provided that the following conditions 5 are met: 6 7 1. Redistributions of source code must retain the above copyright 8 notice, this list of conditions and the following disclaimer. 9 10 2. Redistributions in binary form must reproduce the above 11 copyright notice, this list of conditions and the following 12 disclaimer in the documentation and/or other materials provided 13 with the distribution. 14 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 19 TENSILICA INCORPORATED BE LIABLE FOR ANY DIRECT, INDIRECT, 20 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 24 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 26 OF THE POSSIBILITY OF SUCH DAMAGE. */ 27 28 29 #ifndef _FENV_H 30 #define _FENV_H 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 typedef unsigned long fenv_t; 37 typedef unsigned long fexcept_t; 38 39 #define FE_DIVBYZERO 0x08 40 #define FE_INEXACT 0x01 41 #define FE_INVALID 0x10 42 #define FE_OVERFLOW 0x04 43 #define FE_UNDERFLOW 0x02 44 45 #define FE_ALL_EXCEPT \ 46 (FE_DIVBYZERO | \ 47 FE_INEXACT | \ 48 FE_INVALID | \ 49 FE_OVERFLOW | \ 50 FE_UNDERFLOW) 51 52 #define FE_DOWNWARD 0x3 53 #define FE_TONEAREST 0x0 54 #define FE_TOWARDZERO 0x1 55 #define FE_UPWARD 0x2 56 57 #define FE_DFL_ENV ((const fenv_t *) 0) 58 59 int feclearexcept(int); 60 int fegetexceptflag(fexcept_t *, int); 61 int feraiseexcept(int); 62 int fesetexceptflag(const fexcept_t *, int); 63 int fetestexcept(int); 64 int fegetround(void); 65 int fesetround(int); 66 int fegetenv(fenv_t *); 67 int feholdexcept(fenv_t *); 68 int fesetenv(const fenv_t *); 69 int feupdateenv(const fenv_t *); 70 71 /* glibc extensions */ 72 int feenableexcept(int excepts); 73 int fedisableexcept(int excepts); 74 int fegetexcept(void); 75 76 #define _FE_EXCEPTION_FLAGS_OFFSET 7 77 #define _FE_EXCEPTION_FLAG_MASK (FE_ALL_EXCEPT << _FE_EXCEPTION_FLAGS_OFFSET) 78 #define _FE_EXCEPTION_ENABLE_OFFSET 2 79 #define _FE_EXCEPTION_ENABLE_MASK (FE_ALL_EXCEPT << _FE_EXCEPTION_ENABLE_OFFSET) 80 #define _FE_ROUND_MODE_OFFSET 0 81 #define _FE_ROUND_MODE_MASK (0x3 << _FE_ROUND_MODE_OFFSET) 82 #define _FE_FLOATING_ENV_MASK (_FE_EXCEPTION_FLAG_MASK | _FE_EXCEPTION_ENABLE_MASK | _FE_ROUND_MODE_MASK) 83 84 #ifdef __cplusplus 85 } 86 #endif 87 88 #endif 89
