Cleanup in elf.c with .bss section clean; adm command mounts cdrom instead of floppy...
[ZeXOS.git] / libm / sqrt.c
blob64eea7bb12ba1121c95aae46e1ec34d9b7cef44d
1 /*
2 * ZeX/OS
3 * Copyright (C) 2009 Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 double sqrt (double arg)
22 /*double x, temp;
23 int exp;
24 int i;
26 if (arg <= 0.)
27 return (0.);
29 x = frexp (arg, &exp);
31 while (x < 0.5) {
32 x *= 2;
33 exp --;
36 if (exp & 1) {
37 x *= 2;
38 exp--;
41 temp = 0.5 * (1.0 + x);
43 while (exp > 60) {
44 temp *= (1L << 30);
45 exp -= 60;
48 while (exp < -60) {
49 temp /= (1L << 30);
50 exp += 60;
53 if (exp >= 0)
54 temp *= 1L << (exp/2);
55 else
56 temp /= 1L << (-exp/2);
58 for (i = 0; i <= 4; i ++)
59 temp = 0.5 * (temp + arg / temp);*/
61 return __builtin_sqrt(arg);