| xf.li | bfc6e71 | 2025-02-07 01:54:34 -0800 | [diff] [blame^] | 1 | /* Copyright (C) 1999-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 2.1 of the License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #ifndef _FENV_H |
| 19 | # error "Never use <bits/fenv.h> directly; include <fenv.h> instead." |
| 20 | #endif |
| 21 | |
| 22 | |
| 23 | /* Define bits representing the exception. We use the bit positions |
| 24 | of the appropriate bits in the FPU control word. */ |
| 25 | enum |
| 26 | { |
| 27 | FE_INEXACT = |
| 28 | #define FE_INEXACT 0x04 |
| 29 | FE_INEXACT, |
| 30 | FE_UNDERFLOW = |
| 31 | #define FE_UNDERFLOW 0x08 |
| 32 | FE_UNDERFLOW, |
| 33 | FE_OVERFLOW = |
| 34 | #define FE_OVERFLOW 0x10 |
| 35 | FE_OVERFLOW, |
| 36 | FE_DIVBYZERO = |
| 37 | #define FE_DIVBYZERO 0x20 |
| 38 | FE_DIVBYZERO, |
| 39 | FE_INVALID = |
| 40 | #define FE_INVALID 0x40 |
| 41 | FE_INVALID, |
| 42 | }; |
| 43 | |
| 44 | #define FE_ALL_EXCEPT \ |
| 45 | (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID) |
| 46 | |
| 47 | /* The SH FPU supports two of the four defined rounding modes: round to nearest |
| 48 | and round to zero. We use again the bit positions in the FPU control word |
| 49 | as the values for the appropriate macros. */ |
| 50 | enum |
| 51 | { |
| 52 | __FE_UNDEFINED = -1, |
| 53 | |
| 54 | FE_TONEAREST = |
| 55 | #define FE_TONEAREST 0x0 |
| 56 | FE_TONEAREST, |
| 57 | FE_TOWARDZERO = |
| 58 | #define FE_TOWARDZERO 0x1 |
| 59 | FE_TOWARDZERO, |
| 60 | }; |
| 61 | |
| 62 | |
| 63 | /* Type representing exception flags. */ |
| 64 | typedef unsigned short int fexcept_t; |
| 65 | |
| 66 | |
| 67 | /* Type representing floating-point environment. This function corresponds |
| 68 | to the layout of the block written by the `fstenv'. */ |
| 69 | typedef struct |
| 70 | { |
| 71 | unsigned int __fpscr; |
| 72 | } |
| 73 | fenv_t; |
| 74 | |
| 75 | /* If the default argument is used we use this value. */ |
| 76 | #define FE_DFL_ENV ((const fenv_t *) -1) |