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f964490f RM |
1 | /* Ceil (round to +inf) long double floating-point values. |
2 | IBM extended format long double version. | |
688903eb | 3 | Copyright (C) 2006-2018 Free Software Foundation, Inc. |
f964490f RM |
4 | This file is part of the GNU C Library. |
5 | ||
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. | |
10 | ||
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. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
f964490f | 19 | |
71223ef9 | 20 | #define NO_MATH_REDIRECT |
f964490f | 21 | #include <math.h> |
0d13dfa1 | 22 | #include <math_private.h> |
f964490f RM |
23 | #include <math_ldbl_opt.h> |
24 | #include <float.h> | |
25 | #include <ieee754.h> | |
26 | ||
27 | ||
f964490f RM |
28 | long double |
29 | __ceill (long double x) | |
f964490f | 30 | { |
5c68d401 | 31 | double xh, xl, hi, lo; |
f964490f | 32 | |
5c68d401 | 33 | ldbl_unpack (x, &xh, &xl); |
f964490f | 34 | |
5c68d401 RM |
35 | /* Return Inf, Nan, +/-0 unchanged. */ |
36 | if (__builtin_expect (xh != 0.0 | |
37 | && __builtin_isless (__builtin_fabs (xh), | |
38 | __builtin_inf ()), 1)) | |
16f0eced | 39 | { |
8a9fa008 JM |
40 | hi = __ceil (xh); |
41 | if (hi != xh) | |
42 | { | |
43 | /* The high part is not an integer; the low part does not | |
44 | affect the result. */ | |
45 | xh = hi; | |
46 | xl = 0; | |
47 | } | |
48 | else | |
49 | { | |
50 | /* The high part is a nonzero integer. */ | |
51 | lo = __ceil (xl); | |
52 | xh = hi; | |
53 | xl = lo; | |
54 | ldbl_canonicalize_int (&xh, &xl); | |
55 | } | |
f964490f | 56 | } |
bba14195 JM |
57 | else |
58 | /* Quiet signaling NaN arguments. */ | |
59 | xh += xh; | |
f964490f | 60 | |
5c68d401 | 61 | return ldbl_pack (xh, xl); |
f964490f RM |
62 | } |
63 | ||
64 | long_double_symbol (libm, __ceill, ceill); |