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38 lines
1.2 KiB
C
38 lines
1.2 KiB
C
/* Return nonzero value if number is negative.
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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 <float128_private.h>
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#include <math.h>
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#include <math_private.h>
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/* Once GCC >= 6.0 is required for building glibc, this implementation can
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be removed and replaced with an inclusion of ldbl-128/s_signbitl.c. */
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int
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__signbitf128 (_Float128 x)
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{
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#if __GNUC_PREREQ (6, 0)
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return __builtin_signbit (x);
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#else
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int64_t e;
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GET_FLOAT128_MSW64 (e, x);
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return e < 0;
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#endif
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}
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hidden_def (__signbitf128)
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