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/* Copyright (C) 2012-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Adhemerval Zanella <azanella@linux.vnet.ibm.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 <math.h>
#include <errno.h>
#include <limits.h>
#include <math_private.h>
/* wrapper ilogb */
int
__ilogb (double x)
{
int r = __ieee754_ilogb (x);
if (__builtin_expect (r == FP_ILOGB0, 0)
|| __builtin_expect (r == FP_ILOGBNAN, 0)
|| __builtin_expect (r == INT_MAX, 0))
{
__set_errno (EDOM);
__feraiseexcept (FE_INVALID);
}
return r;
}
weak_alias (__ilogb, ilogb)
#ifdef NO_LONG_DOUBLE
strong_alias (__ilogb, __ilogbl)
weak_alias (__ilogb, ilogbl)
#endif
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