66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
/* @(#)w_scalb.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.
|
|
* ====================================================
|
|
*/
|
|
|
|
#if defined(LIBM_SCCS) && !defined(lint)
|
|
static char rcsid[] = "$NetBSD: w_scalb.c,v 1.6 1995/05/10 20:49:48 jtc Exp $";
|
|
#endif
|
|
|
|
/*
|
|
* wrapper scalb(double x, double fn) is provide for
|
|
* passing various standard test suite. One
|
|
* should use scalbn() instead.
|
|
*/
|
|
|
|
#include <math.h>
|
|
#include "math_private.h"
|
|
|
|
#include <errno.h>
|
|
|
|
#ifdef __STDC__
|
|
#ifdef _SCALB_INT
|
|
double __scalb(double x, int fn) /* wrapper scalb */
|
|
#else
|
|
double __scalb(double x, double fn) /* wrapper scalb */
|
|
#endif
|
|
#else
|
|
double __scalb(x,fn) /* wrapper scalb */
|
|
#ifdef _SCALB_INT
|
|
double x; int fn;
|
|
#else
|
|
double x,fn;
|
|
#endif
|
|
#endif
|
|
{
|
|
#ifdef _IEEE_LIBM
|
|
return __ieee754_scalb(x,fn);
|
|
#else
|
|
double z;
|
|
z = __ieee754_scalb(x,fn);
|
|
if(_LIB_VERSION != _SVID_) return z;
|
|
if(!(__finite(z)||__isnan(z))&&__finite(x)) {
|
|
return __kernel_standard(x,(double)fn,32); /* scalb overflow */
|
|
}
|
|
if(z==0.0&&z!=x) {
|
|
return __kernel_standard(x,(double)fn,33); /* scalb underflow */
|
|
}
|
|
#ifndef _SCALB_INT
|
|
if(!__finite(fn)) __set_errno (ERANGE);
|
|
#endif
|
|
return z;
|
|
#endif
|
|
}
|
|
weak_alias (__scalb, scalb)
|
|
#ifdef NO_LONG_DOUBLE
|
|
strong_alias (__scalb, __scalbl)
|
|
weak_alias (__scalb, scalbl)
|
|
#endif
|