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688903eb | 1 | /* Copyright (C) 2013-2018 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Library General Public License as | |
6 | published by the Free Software Foundation; either version 2 of the | |
7 | License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library 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 GNU | |
12 | Library General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Library General Public | |
15 | License along with the GNU C Library; see the file COPYING.LIB. If | |
16 | not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include <math.h> | |
19 | #include <math_private.h> | |
216933b2 | 20 | #include <libm-alias-float.h> |
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21 | |
22 | float | |
23 | __modff (float x, float *iptr) | |
24 | { | |
25 | if (__builtin_isinff (x)) | |
26 | { | |
27 | *iptr = x; | |
28 | return __copysignf (0.0, x); | |
29 | } | |
30 | else if (__builtin_isnanf (x)) | |
31 | { | |
32 | *iptr = NAN; | |
33 | return NAN; | |
34 | } | |
35 | ||
36 | if (x >= 0.0) | |
37 | { | |
38 | *iptr = __floorf (x); | |
54b46a4b | 39 | return __copysignf (x - *iptr, x); |
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40 | } |
41 | else | |
42 | { | |
43 | *iptr = __ceilf (x); | |
54b46a4b | 44 | return __copysignf (x - *iptr, x); |
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45 | } |
46 | } | |
216933b2 | 47 | libm_alias_float (__modf, modf) |