| /* 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 double log10_high = 0x2.4d7637p0; |
| static const double log10_low = 0x7.6aaa2b05ba95cp-28; |
| |
| double |
| __ieee754_exp10 (double arg) |
| { |
| int32_t lx; |
| double arg_high, arg_low; |
| double exp_high, exp_low; |
| |
| if (!__finite (arg)) |
| return __ieee754_exp (arg); |
| if (arg < DBL_MIN_10_EXP - DBL_DIG - 10) |
| return DBL_MIN * DBL_MIN; |
| else if (arg > DBL_MAX_10_EXP + 1) |
| return DBL_MAX * DBL_MAX; |
| |
| GET_LOW_WORD (lx, arg); |
| lx &= 0xf8000000; |
| arg_high = arg; |
| SET_LOW_WORD (arg_high, lx); |
| arg_low = arg - arg_high; |
| exp_high = arg_high * log10_high; |
| exp_low = arg_high * log10_low + arg_low * M_LN10; |
| return __ieee754_exp (exp_high) * __ieee754_exp (exp_low); |
| } |
| strong_alias (__ieee754_exp10, __exp10_finite) |
