]>
git.ipfire.org Git - thirdparty/glibc.git/blob - sysdeps/ieee754/flt-32/s_roundf.c
1 /* Round float to integer away from zero.
2 Copyright (C) 1997-2013 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
22 #include <math_private.h>
25 static const float huge
= 1.0e30
;
33 GET_FLOAT_WORD (i0
, x
);
34 j0
= ((i0
>> 23) & 0xff) - 0x7f;
39 math_force_eval (huge
+ x
);
47 u_int32_t i
= 0x007fffff >> j0
;
51 math_force_eval (huge
+ x
);
53 /* Raise inexact if x != 0. */
54 i0
+= 0x00400000 >> j0
;
67 SET_FLOAT_WORD (x
, i0
);
70 weak_alias (__roundf
, roundf
)