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b9b49b44 | 1 | /* Round float value to long long int. |
b168057a | 2 | Copyright (C) 1997-2015 Free Software Foundation, Inc. |
b9b49b44 UD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
b9b49b44 UD |
9 | |
10 | The GNU C Library 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 GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
b9b49b44 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
b9b49b44 UD |
18 | |
19 | #include <math.h> | |
20 | ||
da13146d AM |
21 | /* Round to the nearest integer, with values exactly on a 0.5 boundary |
22 | rounded away from zero, regardless of the current rounding mode. | |
23 | If (long long)x, when x is out of range of a long long, clips at | |
24 | LLONG_MAX or LLONG_MIN, then this implementation also clips. */ | |
b9b49b44 UD |
25 | |
26 | long long int | |
27 | __llroundf (float x) | |
28 | { | |
da13146d AM |
29 | long long xr = (long long) x; |
30 | float xrf = (float) xr; | |
31 | ||
b9b49b44 | 32 | if (x >= 0.0) |
da13146d AM |
33 | { |
34 | if (x - xrf >= 0.5) | |
35 | xr += (long long) ((unsigned long long) xr + 1) > 0; | |
36 | } | |
b9b49b44 | 37 | else |
da13146d AM |
38 | { |
39 | if (xrf - x >= 0.5) | |
40 | xr -= (long long) ((unsigned long long) xr - 1) < 0; | |
41 | } | |
42 | return xr; | |
b9b49b44 UD |
43 | } |
44 | weak_alias (__llroundf, llroundf) |