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46 lines
1.7 KiB
C
46 lines
1.7 KiB
C
/* Store current floating-point environment and clear exceptions.
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Copyright (C) 1997-2013 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
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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.h>
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int
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feholdexcept (fenv_t *envp)
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{
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fexcept_t fpcr, fpsr;
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/* Store the environment. */
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#ifdef __mcoldfire__
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__asm__ ("fmove%.l %/fpcr,%0" : "=dm" (envp->__control_register));
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__asm__ ("fmove%.l %/fpsr,%0" : "=dm" (envp->__status_register));
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__asm__ ("fmove%.l %/fpiar,%0" : "=dm" (envp->__instruction_address));
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#else
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__asm__ ("fmovem%.l %/fpcr/%/fpsr/%/fpiar,%0" : "=m" (*envp));
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#endif
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/* Now clear all exceptions. */
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fpsr = envp->__status_register & ~FE_ALL_EXCEPT;
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__asm__ __volatile__ ("fmove%.l %0,%/fpsr" : : "dm" (fpsr));
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/* And set all exceptions to non-stop. */
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fpcr = envp->__control_register & ~(FE_ALL_EXCEPT << 6);
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__asm__ __volatile__ ("fmove%.l %0,%!" : : "dm" (fpcr));
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return 0;
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}
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libm_hidden_def (feholdexcept);
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