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38 lines
1.4 KiB
C
38 lines
1.4 KiB
C
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/* Install given floating-point environment and raise exceptions.
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Copyright (C) 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <fenv_libc.h>
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void
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feupdateenv (const fenv_t *envp)
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{
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fenv_union_t old, new;
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/* Save the currently set exceptions. */
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new.fenv = *envp;
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old.fenv = fegetenv_register ();
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/* Copy the set exceptions from `old' to `new'. */
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new.l[1] = new.l[1] & 0xE00000FF | old.l[1] & 0x1FFFFF00;
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/* Atomically enable and raise (if appropriate) exceptions set in `new'. */
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fesetenv_register (new.fenv);
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}
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