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39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
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/* Copyright (C) 2017-2022 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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__fpclassifyf (float x)
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{
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int cls;
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asm volatile ("fclass.s \t%0, %1" : "=f" (cls) : "f" (x));
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if (__glibc_likely (!!(cls & _FCLASS_NORM)))
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return FP_NORMAL;
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if (__glibc_likely (!!(cls & _FCLASS_ZERO)))
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return FP_ZERO;
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if (__glibc_likely (!!(cls & _FCLASS_SUBNORM)))
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return FP_SUBNORMAL;
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if (__glibc_likely (!!(cls & _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 (__fpclassifyf)
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