2 Copyright (C) 2011-2012 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
25 fmodl (long double x, long double y)
33 fmodl (long double x, long double y)
39 long double q = - truncl (x / y);
40 long double r = fmal (q, y, x); /* = x + q * y, computed in one step */
41 /* Correct possible rounding errors in the quotient x / y. */
46 /* Expect 0 <= r < y. */
48 q += 1, r = fmal (q, y, x);
50 q -= 1, r = fmal (q, y, x);
54 /* Expect - y < r <= 0. */
56 q -= 1, r = fmal (q, y, x);
58 q += 1, r = fmal (q, y, x);
65 /* Expect 0 <= r < - y. */
67 q -= 1, r = fmal (q, y, x);
69 q += 1, r = fmal (q, y, x);
73 /* Expect y < r <= 0. */
75 q += 1, r = fmal (q, y, x);
77 q -= 1, r = fmal (q, y, x);