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38 lines
1.2 KiB
C
38 lines
1.2 KiB
C
/* Fix for conversion of float NAN to double. RISC-V version..
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Copyright (C) 2022-2024 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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#ifndef FIX_FLOAT_DOUBLE_CONVERT_NAN_H
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#define FIX_FLOAT_DOUBLE_CONVERT_NAN_H
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#include <math.h>
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/* RISC-V rvd instructions do not preserve the signbit of NAN
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when converting from float to double. */
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static inline double
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keep_sign_conversion (float flt)
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{
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if (__glibc_unlikely (isnan (flt)))
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{
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float x = copysignf (1.f, flt);
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return copysign ((double) flt, (double) x);
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}
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return flt;
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}
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#endif
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