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/* Fix for conversion of float NAN to double. RISC-V version..
Copyright (C) 2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#ifndef FIX_FLOAT_DOUBLE_CONVERT_NAN_H
#define FIX_FLOAT_DOUBLE_CONVERT_NAN_H
#include <math.h>
/* RISC-V rvd instructions do not preserve the signbit of NAN
when converting from float to double. */
static inline double
keep_sign_conversion (float flt)
{
if (__glibc_unlikely (isnan (flt)))
{
float x = copysignf (1.f, flt);
return copysign ((double) flt, (double) x);
}
return flt;
}
#endif
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