2 Copyright (C) 2012-2018 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 <http://www.gnu.org/licenses/>. */
19 #include "quadmath-imp.h"
24 if (__glibc_likely (__builtin_isless (x
, (__float128
) FLT128_MAX_EXP
)))
26 if (__builtin_expect (__builtin_isgreaterequal (x
, (__float128
) (FLT128_MIN_EXP
- FLT128_MANT_DIG
30 __float128 fractx
= x
- intx
;
32 if (fabsq (fractx
) < FLT128_EPSILON
/ 4)
33 result
= scalbnq (1 + fractx
, intx
);
35 result
= scalbnq (expq (M_LN2q
* fractx
), intx
);
36 math_check_force_underflow_nonneg (result
);
41 /* Underflow or exact zero. */
45 return FLT128_MIN
* FLT128_MIN
;
49 /* Infinity, NaN or overflow. */
50 return FLT128_MAX
* x
;