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69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
/* Raise given exceptions.
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Copyright (C) 1997-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <fenv_libc.h>
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#undef feraiseexcept
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int
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__feraiseexcept (int excepts)
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{
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fenv_union_t u;
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/* Raise exceptions represented by EXCEPTS. It is the responsibility of
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the OS to ensure that if multiple exceptions occur they are fed back
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to this process in the proper way; this can happen in hardware,
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anyway (in particular, inexact with overflow or underflow). */
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/* Get the current state. */
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u.fenv = fegetenv_register ();
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/* Add the exceptions */
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u.l = (u.l
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| (excepts & FPSCR_STICKY_BITS)
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/* Turn FE_INVALID into FE_INVALID_SOFTWARE. */
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| (excepts >> ((31 - FPSCR_VX) - (31 - FPSCR_VXSOFT))
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& FE_INVALID_SOFTWARE));
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/* Store the new status word (along with the rest of the environment),
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triggering any appropriate exceptions. */
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fesetenv_register (u.fenv);
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if ((excepts & FE_INVALID))
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{
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/* For some reason, some PowerPC chips (the 601, in particular)
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don't have FE_INVALID_SOFTWARE implemented. Detect this
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case and raise FE_INVALID_SNAN instead. */
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u.fenv = fegetenv_register ();
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if ((u.l & FE_INVALID) == 0)
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set_fpscr_bit (FPSCR_VXSNAN);
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}
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/* Success. */
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return 0;
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}
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#include <shlib-compat.h>
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#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
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strong_alias (__feraiseexcept, __old_feraiseexcept)
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compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
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#endif
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libm_hidden_def (__feraiseexcept)
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libm_hidden_ver (__feraiseexcept, feraiseexcept)
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versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);
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