diff options
Diffstat (limited to 'math/w_exp10.c')
| -rw-r--r-- | math/w_exp10.c | 58 |
1 files changed, 27 insertions, 31 deletions
diff --git a/math/w_exp10.c b/math/w_exp10.c index 1512cc0a34..830b08df1e 100644 --- a/math/w_exp10.c +++ b/math/w_exp10.c @@ -1,17 +1,22 @@ -/* @(#)w_exp10.c - * Conversion to exp10 by Ulrich Drepper <drepper@cygnus.com>. - */ +/* Copyright (C) 2011 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@gmail.com>, 2011. + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ -/* - * ==================================================== - * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. - * - * Developed at SunPro, a Sun Microsystems, Inc. business. - * Permission to use, copy, modify, and distribute this - * software is freely granted, provided that this notice - * is preserved. - * ==================================================== - */ /* * wrapper exp10(x) @@ -20,25 +25,16 @@ #include <math.h> #include <math_private.h> -#ifdef __STDC__ - double __exp10(double x) /* wrapper exp10 */ -#else - double __exp10(x) /* wrapper exp10 */ - double x; -#endif +double +__exp10 (double x) { -#ifdef _IEEE_LIBM - return __ieee754_exp10(x); -#else - double z; - z = __ieee754_exp10(x); - if(_LIB_VERSION == _IEEE_) return z; - if(!__finite(z) && __finite(x)) { - /* exp10 overflow (46) if x > 0, underflow (47) if x < 0. */ - return __kernel_standard(x,x,46+!!__signbit(x)); - } - return z; -#endif + double z = __ieee754_exp10 (x); + if (__builtin_expect (!__finite (z), 0) + && __finite (x) && _LIB_VERSION != _IEEE_) + /* exp10 overflow (46) if x > 0, underflow (47) if x < 0. */ + return __kernel_standard (x, x, 46 + !!__signbit (x)); + + return z; } weak_alias (__exp10, exp10) strong_alias (__exp10, __pow10) |