44 lines
937 B
C
44 lines
937 B
C
/* @(#)w_hypot.c 5.1 93/09/24 */
|
|
/*
|
|
* ====================================================
|
|
* 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.
|
|
* ====================================================
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char rcsid[] = "$Id$";
|
|
#endif
|
|
|
|
/*
|
|
* wrapper hypot(x,y)
|
|
*/
|
|
|
|
#include "math.h"
|
|
#include "math_private.h"
|
|
|
|
|
|
#ifdef __STDC__
|
|
double hypot(double x, double y)/* wrapper hypot */
|
|
#else
|
|
double hypot(x,y) /* wrapper hypot */
|
|
double x,y;
|
|
#endif
|
|
{
|
|
#ifdef _IEEE_LIBM
|
|
return __ieee754_hypot(x,y);
|
|
#else
|
|
double z;
|
|
z = __ieee754_hypot(x,y);
|
|
if(_LIB_VERSION == _IEEE_) return z;
|
|
if((!finite(z))&&finite(x)&&finite(y))
|
|
return __kernel_standard(x,y,4); /* hypot overflow */
|
|
else
|
|
return z;
|
|
#endif
|
|
}
|