Revert not defining NO_HIDDEN on hurd
[glibc.git] / sysdeps / ieee754 / ldbl-128ibm / e_exp10l.c
blobe1f0cbbc9fa75a36791b69d6e25a7a5be018fb7d
1 /* Copyright (C) 2012-2015 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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 <http://www.gnu.org/licenses/>. */
18 #include <math.h>
19 #include <math_private.h>
20 #include <float.h>
22 static const long double log10_high = 0x2.4d763776aaap+0L;
23 static const long double log10_low = 0x2.b05ba95b58ae0b4c28a38a3fb4p-48L;
25 long double
26 __ieee754_exp10l (long double arg)
28 union ibm_extended_long_double u;
29 long double arg_high, arg_low;
30 long double exp_high, exp_low;
32 if (!isfinite (arg))
33 return __ieee754_expl (arg);
34 if (arg < LDBL_MIN_10_EXP - LDBL_DIG - 10)
35 return LDBL_MIN * LDBL_MIN;
36 else if (arg > LDBL_MAX_10_EXP + 1)
37 return LDBL_MAX * LDBL_MAX;
38 else if (fabsl (arg) < 0x1p-109L)
39 return 1.0L;
41 u.ld = arg;
42 arg_high = u.d[0].d;
43 arg_low = u.d[1].d;
44 exp_high = arg_high * log10_high;
45 exp_low = arg_high * log10_low + arg_low * M_LN10l;
46 return __ieee754_expl (exp_high) * __ieee754_expl (exp_low);
48 strong_alias (__ieee754_exp10l, __exp10l_finite)