Remove trailing white space.
[glibc.git] / math / w_scalb.c
blob0f1e2df8ef1d14e9db63a89cb951b5a3a6199922
1 /* Copyright (C) 2011-2014 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
19 #include <errno.h>
20 #include <math.h>
21 #include <math_private.h>
24 static double
25 __attribute__ ((noinline))
26 sysv_scalb (double x, double fn)
28 double z = __ieee754_scalb (x, fn);
30 if (__glibc_unlikely (__isinf (z)))
32 if (__finite (x))
33 return __kernel_standard (x, fn, 32); /* scalb overflow */
34 else
35 __set_errno (ERANGE);
37 else if (__builtin_expect (z == 0.0, 0) && z != x)
38 return __kernel_standard (x, fn, 33); /* scalb underflow */
40 return z;
44 /* Wrapper scalb */
45 double
46 __scalb (double x, double fn)
48 if (__glibc_unlikely (_LIB_VERSION == _SVID_))
49 return sysv_scalb (x, fn);
50 else
52 double z = __ieee754_scalb (x, fn);
54 if (__glibc_unlikely (!__finite (z) || z == 0.0))
56 if (__isnan (z))
58 if (!__isnan (x) && !__isnan (fn))
59 __set_errno (EDOM);
61 else if (__isinf_ns (z))
63 if (!__isinf_ns (x) && !__isinf_ns (fn))
64 __set_errno (ERANGE);
66 else
68 /* z == 0. */
69 if (x != 0.0 && !__isinf_ns (fn))
70 __set_errno (ERANGE);
73 return z;
76 weak_alias (__scalb, scalb)
77 #ifdef NO_LONG_DOUBLE
78 strong_alias (__scalb, __scalbl)
79 weak_alias (__scalb, scalbl)
80 #endif