hppa: Cleanup libm-test-ulps.
[glibc.git] / math / w_scalbl.c
blob148cdc2c2e3ebc02aedfd1a5d1ba06cf25488cb5
1 /* Copyright (C) 2011-2013 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 long double
25 __attribute__ ((noinline))
26 sysv_scalbl (long double x, long double fn)
28 long double z = __ieee754_scalbl (x, fn);
30 if (__builtin_expect (__isinfl (z), 0))
32 if (__finitel (x))
33 return __kernel_standard_l (x, fn, 232); /* scalb overflow */
34 else
35 __set_errno (ERANGE);
37 else if (__builtin_expect (z == 0.0L, 0) && z != x)
38 return __kernel_standard_l (x, fn, 233); /* scalb underflow */
40 return z;
44 /* Wrapper scalbl */
45 long double
46 __scalbl (long double x, long double fn)
48 return (__builtin_expect (_LIB_VERSION == _SVID_, 0)
49 ? sysv_scalbl (x, fn)
50 : __ieee754_scalbl (x, fn));
52 weak_alias (__scalbl, scalbl)