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5ce24e77ed
Add hidden aliases for fegetenv, feupdateenv, and ftestexcept. This avoids libc needing to go through the PLT for these functions. Signed-off-by: Carlos O'Donell <carlos@codesourcery.com>
42 lines
1.5 KiB
C
42 lines
1.5 KiB
C
/* Install given floating-point environment and raise exceptions.
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Copyright (C) 2000, 2011 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by David Huggins-Daines <dhd@debian.org>, 2000
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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <fenv.h>
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#include <string.h>
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int
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feupdateenv (const fenv_t *envp)
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{
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union { unsigned long long l; unsigned int sw[2]; } s;
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fenv_t temp;
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/* Get the current exception status */
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__asm__ ("fstd %%fr0,0(%1) \n\t"
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"fldd 0(%1),%%fr0 \n\t"
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: "=m" (s.l) : "r" (&s.l));
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memcpy(&temp, envp, sizeof(fenv_t));
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/* Currently raised exceptions not cleared */
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temp.__status_word |= s.sw[0] & (FE_ALL_EXCEPT << 27);
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/* Install new environment. */
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fesetenv (&temp);
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/* Success. */
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return 0;
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}
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libm_hidden_def (feupdateenv)
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