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/* Copyright (C) 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#define __LIBC_M81_MATH_INLINES
#include <math.h>
#include "math_private.h"
#ifndef SUFF
#define SUFF
#endif
#ifndef float_type
#define float_type double
#endif
#define __CONCATX(a,b) __CONCAT(a,b)
float_type
__CONCATX(__ieee754_pow,SUFF) (float_type x, float_type y)
{
float_type z;
float_type ax;
if (y == 0.0)
return 1.0;
if (x != x || y != y)
return x + y;
if (__m81_u(__CONCATX(__isinf,SUFF)) (y))
{
ax = __CONCATX(fabs,SUFF) (x);
if (ax == 1)
return y - y;
if (ax > 1)
return y > 0 ? y : 0;
else
return y < 0 ? -y : 0;
}
if (__CONCATX(fabs,SUFF) (y) == 1)
return y > 0 ? x : 1 / x;
if (y == 2)
return x * x;
if (y == 0 && x >= 0)
return __m81_u(__CONCATX(__ieee754_sqrt,SUFF)) (x);
if (x == 10.0)
{
__asm ("ftentox%.x %1, %0" : "=f" (z) : "f" (y));
return z;
}
if (x == 2.0)
{
__asm ("ftwotox%.x %1, %0" : "=f" (z) : "f" (y));
return z;
}
ax = __CONCATX(fabs,SUFF) (x);
if (__m81_u(__CONCATX(__isinf,SUFF)) (x) || x == 0 || ax == 1)
{
z = ax;
if (y < 0)
z = 1 / z;
if (signbit (x))
{
float_type temp = __m81_u (__CONCATX(__rint,SUFF)) (y);
if (y != temp)
{
if (x == -1)
z = (z - z) / (z - z);
}
else
{
if (sizeof (float_type) == sizeof (float))
{
long i = (long) y;
if (i & 1)
z = -z;
}
else
{
long long i = (long long) y;
if ((float_type) i == y && i & 1)
z = -z;
}
}
}
return z;
}
if (x < 0.0)
{
float_type temp = __m81_u (__CONCATX(__rint,SUFF)) (y);
if (y == temp)
{
long long i = (long long) y;
z = (__m81_u(__CONCATX(__ieee754_exp,SUFF))
(y * __m81_u(__CONCATX(__ieee754_log,SUFF)) (-x)));
if (sizeof (float_type) == sizeof (float))
{
long i = (long) y;
if (i & 1)
z = -z;
}
else
{
/* If the conversion to long long was inexact assume that y
is an even integer. */
if ((float_type) i == y && i & 1)
z = -z;
}
}
else
z = (x - x) / (x - x);
}
else
z = (__m81_u(__CONCATX(__ieee754_exp,SUFF))
(y * __m81_u(__CONCATX(__ieee754_log,SUFF)) (x)));
return z;
}
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