mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-17 18:40:14 +00:00
4a7ceb5a83
1998-02-11 08:30 H.J. Lu <hjl@gnu.org> * sysdeps/libm-ieee754/w_powl.c (__powl): Use __finitel instead of __finite.
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/* w_powl.c -- long double version of w_pow.c.
|
|
* Conversion to long double by Ulrich Drepper,
|
|
* Cygnus Support, drepper@cygnus.com.
|
|
*/
|
|
|
|
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* Developed at SunPro, a Sun Microsystems, Inc. business.
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software is freely granted, provided that this notice
|
|
* is preserved.
|
|
* ====================================================
|
|
*/
|
|
|
|
/*
|
|
* wrapper powl(x,y) return x**y
|
|
*/
|
|
|
|
#include "math.h"
|
|
#include "math_private.h"
|
|
|
|
|
|
#ifdef __STDC__
|
|
long double __powl(long double x, long double y)/* wrapper powl */
|
|
#else
|
|
long double __powl(x,y) /* wrapper powl */
|
|
long double x,y;
|
|
#endif
|
|
{
|
|
#ifdef _IEEE_LIBM
|
|
return __ieee754_powl(x,y);
|
|
#else
|
|
long double z;
|
|
z=__ieee754_powl(x,y);
|
|
if(_LIB_VERSION == _IEEE_|| __isnanl(y)) return z;
|
|
if(__isnanl(x)) {
|
|
if(y==0.0)
|
|
return __kernel_standard(x,y,242); /* pow(NaN,0.0) */
|
|
else
|
|
return z;
|
|
}
|
|
if(x==0.0){
|
|
if(y==0.0)
|
|
return __kernel_standard(x,y,220); /* pow(0.0,0.0) */
|
|
if(__finitel(y)&&y<0.0)
|
|
if (signbit (x) && signbit (z))
|
|
return __kernel_standard(x,y,223); /* pow(-0.0,negative) */
|
|
else
|
|
return __kernel_standard(x,y,243); /* pow(+0.0,negative) */
|
|
return z;
|
|
}
|
|
if(!__finitel(z)) {
|
|
if(__finitel(x)&&__finitel(y)) {
|
|
if(__isnanl(z))
|
|
return __kernel_standard(x,y,224); /* pow neg**non-int */
|
|
else
|
|
return __kernel_standard(x,y,221); /* pow overflow */
|
|
}
|
|
}
|
|
if(z==0.0&&__finitel(x)&&__finitel(y))
|
|
return __kernel_standard(x,y,222); /* pow underflow */
|
|
return z;
|
|
#endif
|
|
}
|
|
weak_alias (__powl, powl)
|