| 1 | /* Store current floating-point environment and clear exceptions. |
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| 2 | Copyright (C) 1997-2024 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 | #include <fpu_control.h> |
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| 21 | |
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| 22 | int |
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| 23 | __feholdexcept (fenv_t *envp) |
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| 24 | { |
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| 25 | fenv_union_t old, new; |
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| 26 | |
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| 27 | /* Save the currently set exceptions. */ |
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| 28 | old.fenv = *envp = fegetenv_register (); |
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| 29 | |
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| 30 | /* Clear everything except for the rounding modes and non-IEEE arithmetic |
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| 31 | flag. */ |
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| 32 | new.l = old.l & 0xffffffff00000007LL; |
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| 33 | |
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| 34 | if (new.l == old.l) |
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| 35 | return 0; |
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| 36 | |
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| 37 | __TEST_AND_ENTER_NON_STOP (old.l, 0ULL); |
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| 38 | |
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| 39 | /* Put the new state in effect. */ |
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| 40 | fesetenv_register (new.fenv); |
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| 41 | |
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| 42 | return 0; |
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| 43 | } |
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| 44 | libm_hidden_def (__feholdexcept) |
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| 45 | weak_alias (__feholdexcept, feholdexcept) |
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| 46 | libm_hidden_weak (feholdexcept) |
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| 47 | |
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