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/* Copyright (C) 2011-2016 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 <math.h>
#include "math_private.h"
#if !defined __NO_LONG_DOUBLE_MATH
/* wrapper powl */
long double
powl (long double x, long double y)
{
#if defined(__UCLIBC_HAS_FENV__)
long double z = (long double) __ieee754_pow ((double) x, (double) y);
if (__builtin_expect (!isfinite (z), 0))
{
if (_LIB_VERSION != _IEEE_)
{
if (isnan (x))
{
if (y == 0.0L)
/* pow(NaN,0.0) */
return __kernel_standard_l (x, y, 242);
}
else if (isfinite (x) && isfinite (y))
{
if (isnan (z))
/* pow neg**non-int */
return __kernel_standard_l (x, y, 224);
else if (x == 0.0L && y < 0.0L)
{
if (signbit (x) && signbit (z))
/* pow(-0.0,negative) */
return __kernel_standard_l (x, y, 223);
else
/* pow(+0.0,negative) */
return __kernel_standard_l (x, y, 243);
}
else
/* pow overflow */
return __kernel_standard_l (x, y, 221);
}
}
}
else if (__builtin_expect (z == 0.0L, 0) && isfinite (x) && isfinite (y)
&& _LIB_VERSION != _IEEE_)
{
if (x == 0.0L)
{
if (y == 0.0L)
/* pow(0.0,0.0) */
return __kernel_standard_l (x, y, 220);
}
else
/* pow underflow */
return __kernel_standard_l (x, y, 222);
}
return z;
# else
return (long double) __ieee754_pow ((double) x, (double) y);
# endif /* __UCLIBC_HAS_FENV__ */
}
#endif /* __NO_LONG_DOUBLE_MATH */
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