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1 | /* Copyright (C) 2011 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. | |
3 | Contributed by Ulrich Drepper <drepper@gmail.com>, 2011. | |
ee188d55 | 4 | |
0ac5ae23 UD |
5 | The GNU C Library is free software; you can redistribute it and/or |
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. | |
ee188d55 | 9 | |
0ac5ae23 UD |
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 | |
13 | Lesser General Public License for more details. | |
ee188d55 | 14 | |
0ac5ae23 UD |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
ee188d55 | 19 | |
0ac5ae23 | 20 | #include <errno.h> |
9d13fb24 | 21 | #include <math.h> |
9277c064 | 22 | #include <math_private.h> |
ee188d55 | 23 | |
ee188d55 | 24 | |
0ac5ae23 UD |
25 | static long double |
26 | __attribute__ ((noinline)) | |
27 | sysv_scalbl (long double x, long double fn) | |
28 | { | |
29 | long double z = __ieee754_scalbl (x, fn); | |
30 | ||
31 | if (__builtin_expect (__isinfl (z), 0)) | |
32 | { | |
33 | if (__finitel (x)) | |
34 | return __kernel_standard (x, fn, 232); /* scalb overflow */ | |
35 | else | |
36 | __set_errno (ERANGE); | |
37 | } | |
38 | else if (__builtin_expect (z == 0.0L, 0) && z != x) | |
39 | return __kernel_standard (x, fn, 233); /* scalb underflow */ | |
40 | ||
41 | return z; | |
42 | } | |
43 | ||
44 | ||
45 | /* Wrapper scalbl */ | |
46 | long double | |
47 | __scalbl (long double x, long double fn) | |
ee188d55 | 48 | { |
0ac5ae23 UD |
49 | return (__builtin_expect (_LIB_VERSION == _SVID_, 0) |
50 | ? sysv_scalbl (x, fn) | |
51 | : __ieee754_scalbl (x, fn)); | |
ee188d55 RM |
52 | } |
53 | weak_alias (__scalbl, scalbl) |