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37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
/* fpclassify(). RISC-V version.
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Copyright (C) 2017-2020 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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<https://www.gnu.org/licenses/>. */
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#include <math.h>
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#include <fenv_private.h>
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int
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__fpclassify (double x)
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{
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int cls = _FCLASS (x);
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if (__builtin_expect (cls & _FCLASS_NORM, _FCLASS_NORM))
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return FP_NORMAL;
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if (__builtin_expect (cls & _FCLASS_ZERO, _FCLASS_ZERO))
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return FP_ZERO;
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if (__builtin_expect (cls & _FCLASS_SUBNORM, _FCLASS_SUBNORM))
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return FP_SUBNORMAL;
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if (__builtin_expect (cls & _FCLASS_INF, _FCLASS_INF))
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return FP_INFINITE;
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return FP_NAN;
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}
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libm_hidden_def (__fpclassify)
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