mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-08 22:30:07 +00:00
53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/* Copyright (C) 2011-2014 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <math.h>
|
|
#include <math_private.h>
|
|
|
|
|
|
static long double
|
|
__attribute__ ((noinline))
|
|
sysv_scalbl (long double x, long double fn)
|
|
{
|
|
long double z = __ieee754_scalbl (x, fn);
|
|
|
|
if (__glibc_unlikely (__isinfl (z)))
|
|
{
|
|
if (__finitel (x))
|
|
return __kernel_standard_l (x, fn, 232); /* scalb overflow */
|
|
else
|
|
__set_errno (ERANGE);
|
|
}
|
|
else if (__builtin_expect (z == 0.0L, 0) && z != x)
|
|
return __kernel_standard_l (x, fn, 233); /* scalb underflow */
|
|
|
|
return z;
|
|
}
|
|
|
|
|
|
/* Wrapper scalbl */
|
|
long double
|
|
__scalbl (long double x, long double fn)
|
|
{
|
|
return (__builtin_expect (_LIB_VERSION == _SVID_, 0)
|
|
? sysv_scalbl (x, fn)
|
|
: __ieee754_scalbl (x, fn));
|
|
}
|
|
weak_alias (__scalbl, scalbl)
|