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| 1 | /* Determine floating-point rounding mode within libc. ARM version. |
|---|---|
| 2 | Copyright (C) 2012-2022 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 _ARM_GET_ROUNDING_MODE_H |
| 20 | #define _ARM_GET_ROUNDING_MODE_H 1 |
| 21 | |
| 22 | #include <arm-features.h> |
| 23 | #include <fenv.h> |
| 24 | #include <fpu_control.h> |
| 25 | |
| 26 | /* Return the floating-point rounding mode. */ |
| 27 | |
| 28 | static inline int |
| 29 | get_rounding_mode (void) |
| 30 | { |
| 31 | fpu_control_t fpscr; |
| 32 | |
| 33 | /* FE_TONEAREST is the only supported rounding mode |
| 34 | if a VFP unit isn't present. */ |
| 35 | if (!ARM_HAVE_VFP) |
| 36 | return FE_TONEAREST; |
| 37 | |
| 38 | _FPU_GETCW (fpscr); |
| 39 | return fpscr & _FPU_MASK_RM; |
| 40 | } |
| 41 | |
| 42 | #endif /* get-rounding-mode.h */ |
| 43 |
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