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45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
/* Set current rounding direction.
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Copyright (C) 2004-2014 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.h>
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#include <fpu_control.h>
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#include <arm-features.h>
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int
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fesetround (int round)
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{
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fpu_control_t fpscr;
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/* FE_TONEAREST is the only supported rounding mode
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if a VFP unit isn't present. */
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if (!ARM_HAVE_VFP)
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return (round == FE_TONEAREST) ? 0 : 1;
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/* Fail if the rounding mode is not valid. */
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if (round & ~FE_TOWARDZERO)
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return 1;
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_FPU_GETCW (fpscr);
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fpscr = (fpscr & ~FE_TOWARDZERO) | round;
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_FPU_SETCW (fpscr);
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return 0;
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}
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libm_hidden_def (fesetround)
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