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41 lines
1.3 KiB
C
41 lines
1.3 KiB
C
/* Set current rounding direction.
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Copyright (C) 1997-2018 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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__fesetround (int round)
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{
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fexcept_t fpcr;
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if (round & ~FE_UPWARD)
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/* ROUND is no valid rounding mode. */
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return 1;
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__asm__ ("fmove%.l %!,%0" : "=dm" (fpcr));
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fpcr &= ~FE_UPWARD;
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fpcr |= round;
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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 (__fesetround)
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weak_alias (__fesetround, fesetround)
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libm_hidden_weak (fesetround)
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