mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-24 13:33:08 +03:00
75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
/* Copyright (C) 2011-2012 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>
|
|
|
|
|
|
/* wrapper powl */
|
|
long double
|
|
__powl (long double x, long double y)
|
|
{
|
|
long double z = __ieee754_powl (x, y);
|
|
if (__builtin_expect (!__finitel (z), 0))
|
|
{
|
|
if (_LIB_VERSION != _IEEE_)
|
|
{
|
|
if (__isnanl (x))
|
|
{
|
|
if (y == 0.0L)
|
|
/* pow(NaN,0.0) */
|
|
return __kernel_standard_l (x, y, 242);
|
|
}
|
|
else if (__finitel (x) && __finitel (y))
|
|
{
|
|
if (__isnanl (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) && __finitel (x) && __finitel (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;
|
|
}
|
|
weak_alias (__powl, powl)
|