| 1 | /* Raise given 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 | |
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| 21 | int |
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| 22 | __feraiseexcept (int excepts) |
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| 23 | { |
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| 24 | fenv_union_t u; |
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| 25 | |
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| 26 | /* Raise exceptions represented by EXCEPTS. It is the responsibility of |
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| 27 | the OS to ensure that if multiple exceptions occur they are fed back |
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| 28 | to this process in the proper way; this can happen in hardware, |
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| 29 | anyway (in particular, inexact with overflow or underflow). */ |
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| 30 | |
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| 31 | /* Get the current state. */ |
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| 32 | u.fenv = fegetenv_register (); |
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| 33 | |
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| 34 | /* Add the exceptions */ |
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| 35 | u.l = (u.l |
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| 36 | | (excepts & FPSCR_STICKY_BITS) |
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| 37 | /* Turn FE_INVALID into FE_INVALID_SOFTWARE. */ |
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| 38 | | (excepts >> ((31 - FPSCR_VX) - (31 - FPSCR_VXSOFT)) |
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| 39 | & FE_INVALID_SOFTWARE)); |
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| 40 | |
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| 41 | /* Store the new status word (along with the rest of the environment), |
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| 42 | triggering any appropriate exceptions. */ |
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| 43 | fesetenv_register (u.fenv); |
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| 44 | |
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| 45 | if ((excepts & FE_INVALID)) |
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| 46 | { |
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| 47 | /* For some reason, some PowerPC chips (the 601, in particular) |
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| 48 | don't have FE_INVALID_SOFTWARE implemented. Detect this |
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| 49 | case and raise FE_INVALID_SNAN instead. */ |
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| 50 | u.fenv = fegetenv_register (); |
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| 51 | if ((u.l & FE_INVALID) == 0) |
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| 52 | set_fpscr_bit (FPSCR_VXSNAN); |
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| 53 | } |
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| 54 | |
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| 55 | /* Success. */ |
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| 56 | return 0; |
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| 57 | } |
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| 58 | |
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| 59 | #include <shlib-compat.h> |
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| 60 | #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2) |
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| 61 | strong_alias (__feraiseexcept, __old_feraiseexcept) |
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| 62 | compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1); |
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| 63 | #endif |
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| 64 | |
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| 65 | libm_hidden_def (__feraiseexcept) |
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| 66 | libm_hidden_ver (__feraiseexcept, feraiseexcept) |
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| 67 | versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2); |
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| 68 | |
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