1/* Copyright (C) 1998-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <math.h>
19#include <math_private.h>
20#include <float.h>
21#include <libm-alias-finite.h>
22
23long double
24__ieee754_exp10l (long double arg)
25{
26 if (isfinite (arg) && arg < LDBL_MIN_10_EXP - LDBL_DIG - 10)
27 return LDBL_MIN * LDBL_MIN;
28 else
29 /* This is a very stupid and inprecise implementation. It'll get
30 replaced sometime (soon?). */
31 return __ieee754_expl (M_LN10l * arg);
32}
33libm_alias_finite (__ieee754_exp10, __exp10)
34

source code of glibc/math/e_exp10l.c