1 /* Fix for conversion of float NAN to double. RISC-V version..
2 Copyright (C) 2022-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library. If not, see
17 <https://www.gnu.org/licenses/>. */
19 #ifndef FIX_FLOAT_DOUBLE_CONVERT_NAN_H
20 #define FIX_FLOAT_DOUBLE_CONVERT_NAN_H
24 /* RISC-V rvd instructions do not preserve the signbit of NAN
25 when converting from float to double. */
27 keep_sign_conversion (float flt
)
29 if (__glibc_unlikely (isnan (flt
)))
31 float x
= copysignf (1.f
, flt
);
32 return copysign ((double) flt
, (double) x
);