| 1 | /* Install given floating-point control modes. Alpha version. |
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| 2 | Copyright (C) 2016-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <fenv_libc.h> |
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| 20 | |
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| 21 | int |
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| 22 | fesetmode (const femode_t *modep) |
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| 23 | { |
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| 24 | unsigned long int fpcr; |
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| 25 | unsigned long int swcr; |
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| 26 | femode_t mode; |
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| 27 | |
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| 28 | /* As in fesetenv. */ |
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| 29 | if ((long int) modep >= 0) |
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| 30 | mode = *modep; |
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| 31 | else |
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| 32 | mode = (unsigned long int) modep; |
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| 33 | |
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| 34 | __asm__ __volatile__ ("excb; mf_fpcr %0" : "=f" (fpcr)); |
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| 35 | fpcr = (fpcr & ~FPCR_ROUND_MASK) | (mode & FPCR_ROUND_MASK); |
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| 36 | __asm__ __volatile__ ("mt_fpcr %0" : : "f" (fpcr)); |
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| 37 | |
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| 38 | swcr = __ieee_get_fp_control (); |
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| 39 | swcr = ((mode & SWCR_ALL_MASK & ~SWCR_STATUS_MASK) |
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| 40 | | (swcr & SWCR_STATUS_MASK)); |
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| 41 | __ieee_set_fp_control (swcr); |
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| 42 | |
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| 43 | return 0; |
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| 44 | } |
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| 45 | |
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