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| 1 | /* Floating point environment. C-SKY version. |
|---|---|
| 2 | Copyright (C) 2018-2024 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library. If not, see |
| 17 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #ifndef _FENV_H |
| 20 | # error "Never use <bits/fenv.h> directly; include <fenv.h> instead." |
| 21 | #endif |
| 22 | |
| 23 | #ifdef __csky_hard_float__ |
| 24 | /* Define bits representing the exception. We use the bit positions |
| 25 | of the appropriate bits in the FPU control word. */ |
| 26 | enum |
| 27 | { |
| 28 | FE_INVALID = |
| 29 | #define FE_INVALID 0x01 |
| 30 | FE_INVALID, |
| 31 | FE_DIVBYZERO = |
| 32 | #define FE_DIVBYZERO 0x02 |
| 33 | FE_DIVBYZERO, |
| 34 | FE_OVERFLOW = |
| 35 | #define FE_OVERFLOW 0x04 |
| 36 | FE_OVERFLOW, |
| 37 | FE_UNDERFLOW = |
| 38 | #define FE_UNDERFLOW 0x08 |
| 39 | FE_UNDERFLOW, |
| 40 | FE_INEXACT = |
| 41 | #define FE_INEXACT 0x10 |
| 42 | FE_INEXACT, |
| 43 | __FE_DENORMAL = 0x20 |
| 44 | }; |
| 45 | |
| 46 | #define FE_ALL_EXCEPT \ |
| 47 | (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID) |
| 48 | |
| 49 | /* The C-SKY FPU supports all of the four defined rounding modes. We |
| 50 | use again the bit positions in the FPU control word as the values |
| 51 | for the appropriate macros. */ |
| 52 | enum |
| 53 | { |
| 54 | FE_TONEAREST = |
| 55 | #define FE_TONEAREST (0x0 << 24) |
| 56 | FE_TONEAREST, |
| 57 | FE_TOWARDZERO = |
| 58 | #define FE_TOWARDZERO (0x1 << 24) |
| 59 | FE_TOWARDZERO, |
| 60 | FE_UPWARD = |
| 61 | #define FE_UPWARD (0x2 << 24) |
| 62 | FE_UPWARD, |
| 63 | FE_DOWNWARD = |
| 64 | #define FE_DOWNWARD (0x3 << 24) |
| 65 | FE_DOWNWARD, |
| 66 | __FE_ROUND_MASK = (0x3 << 24) |
| 67 | }; |
| 68 | |
| 69 | #else |
| 70 | |
| 71 | /* In the soft-float case, only rounding to nearest is supported, with |
| 72 | no exceptions. */ |
| 73 | |
| 74 | enum |
| 75 | { |
| 76 | __FE_UNDEFINED = -1, |
| 77 | |
| 78 | FE_TONEAREST = |
| 79 | # define FE_TONEAREST 0x0 |
| 80 | FE_TONEAREST |
| 81 | }; |
| 82 | |
| 83 | # define FE_ALL_EXCEPT 0 |
| 84 | |
| 85 | #endif |
| 86 | |
| 87 | /* Type representing exception flags. */ |
| 88 | typedef unsigned int fexcept_t; |
| 89 | |
| 90 | /* Type representing floating-point environment. */ |
| 91 | typedef struct |
| 92 | { |
| 93 | unsigned int __fpcr; |
| 94 | unsigned int __fpsr; |
| 95 | } fenv_t; |
| 96 | |
| 97 | /* If the default argument is used we use this value. */ |
| 98 | #define FE_DFL_ENV ((const fenv_t *) -1) |
| 99 | |
| 100 | #if defined __USE_GNU && defined __csky_hard_float__ |
| 101 | /* Floating-point environment where none of the exceptions are masked. */ |
| 102 | # define FE_NOMASK_ENV ((const fenv_t *) -2) |
| 103 | #endif |
| 104 | |
| 105 | #if __GLIBC_USE (IEC_60559_BFP_EXT_C2X) |
| 106 | /* Type representing floating-point control modes. */ |
| 107 | typedef unsigned int femode_t; |
| 108 | |
| 109 | /* Default floating-point control modes. */ |
| 110 | # define FE_DFL_MODE ((const femode_t *) -1L) |
| 111 | #endif |
| 112 |
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