| /* Copyright (C) 2012-2014 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 |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <math.h> |
| #include <math_private.h> |
| #include <float.h> |
| |
| static const long double log10_high = 0x2.4d763776aaa2cp0L; |
| static const long double log10_low = -0xf.a456a4a751f4b3d75c75c04c18p-56L; |
| |
| long double |
| __ieee754_exp10l (long double arg) |
| { |
| union ibm_extended_long_double u; |
| long double arg_high, arg_low; |
| long double exp_high, exp_low; |
| |
| if (!__finitel (arg)) |
| return __ieee754_expl (arg); |
| if (arg < LDBL_MIN_10_EXP - LDBL_DIG - 10) |
| return LDBL_MIN * LDBL_MIN; |
| else if (arg > LDBL_MAX_10_EXP + 1) |
| return LDBL_MAX * LDBL_MAX; |
| |
| u.ld = arg; |
| arg_high = u.d[0].d; |
| arg_low = u.d[1].d; |
| exp_high = arg_high * log10_high; |
| exp_low = arg_high * log10_low + arg_low * M_LN10l; |
| return __ieee754_expl (exp_high) * __ieee754_expl (exp_low); |
| } |
| strong_alias (__ieee754_exp10l, __exp10l_finite) |
