X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=lib%2Fldexpl.c;h=b8e225b9f1e70aece50d62275fc9487126535931;hb=f5d7314bdeb3d2022ed572f48feba6546baf5f5b;hp=bb16be66b63c355efdf129463bc48d0acf9a869b;hpb=9a18258bbd90815fea0eeabea8e363de469464b4;p=gnulib.git diff --git a/lib/ldexpl.c b/lib/ldexpl.c index bb16be66b..b8e225b9f 100644 --- a/lib/ldexpl.c +++ b/lib/ldexpl.c @@ -1,23 +1,22 @@ /* Emulation for ldexpl. Contributed by Paolo Bonzini - Copyright 2002, 2003, 2007 Free Software Foundation, Inc. + Copyright 2002, 2003, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. This file is part of gnulib. - This program is free software; you can redistribute it and/or modify + This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. This program 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 General Public License for more details. - You should have received a copy of the GNU General Public License along - with this program; if not, write to the Free Software Foundation, - Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ #include @@ -26,10 +25,9 @@ #include #include "fpucw.h" -#include "isnanl.h" long double -ldexpl(long double x, int exp) +ldexpl (long double x, int exp) { long double factor; int bit; @@ -41,25 +39,25 @@ ldexpl(long double x, int exp) if (!(isnanl (x) || x + x == x)) { if (exp < 0) - { - exp = -exp; - factor = 0.5L; - } + { + exp = -exp; + factor = 0.5L; + } else - factor = 2.0L; + factor = 2.0L; if (exp > 0) - for (bit = 1;;) - { - /* Invariant: Here bit = 2^i, factor = 2^-2^i or = 2^2^i, - and bit <= exp. */ - if (exp & bit) - x *= factor; - bit <<= 1; - if (bit > exp) - break; - factor = factor * factor; - } + for (bit = 1;;) + { + /* Invariant: Here bit = 2^i, factor = 2^-2^i or = 2^2^i, + and bit <= exp. */ + if (exp & bit) + x *= factor; + bit <<= 1; + if (bit > exp) + break; + factor = factor * factor; + } } END_LONG_DOUBLE_ROUNDING (); @@ -74,6 +72,6 @@ main (void) long double x; int y; for (y = 0; y < 29; y++) - printf ("%5d %.16Lg %.16Lg\n", y, ldexpl(0.8L, y), ldexpl(0.8L, -y) * ldexpl(0.8L, y)); + printf ("%5d %.16Lg %.16Lg\n", y, ldexpl (0.8L, y), ldexpl (0.8L, -y) * ldexpl (0.8L, y)); } #endif