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File: [cvs.NetBSD.org] / src / lib / libm / src / w_scalbf.c (download)

Revision 1.5, Fri Jul 2 15:37:45 1999 UTC (24 years, 9 months ago) by simonb
Branch: MAIN
CVS Tags: wrstuden-devbsize-base, wrstuden-devbsize-19991221, wrstuden-devbsize, netbsd-1-6-base, netbsd-1-6-RELEASE, netbsd-1-6-RC3, netbsd-1-6-RC2, netbsd-1-6-RC1, netbsd-1-6-PATCH002-RELEASE, netbsd-1-6-PATCH002-RC4, netbsd-1-6-PATCH002-RC3, netbsd-1-6-PATCH002-RC2, netbsd-1-6-PATCH002-RC1, netbsd-1-6-PATCH002, netbsd-1-6-PATCH001-RELEASE, netbsd-1-6-PATCH001-RC3, netbsd-1-6-PATCH001-RC2, netbsd-1-6-PATCH001-RC1, netbsd-1-6-PATCH001, netbsd-1-6, netbsd-1-5-base, netbsd-1-5-RELEASE, netbsd-1-5-PATCH003, netbsd-1-5-PATCH002, netbsd-1-5-PATCH001, netbsd-1-5-BETA2, netbsd-1-5-BETA, netbsd-1-5-ALPHA2, netbsd-1-5, minoura-xpg4dl-base, minoura-xpg4dl, comdex-fall-1999-base, comdex-fall-1999
Changes since 1.4: +5 -5 lines 

More trailing white space.

/* w_scalbf.c -- float version of w_scalb.c.
 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@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.
 * ====================================================
 */

#include <sys/cdefs.h>
#if defined(LIBM_SCCS) && !defined(lint)
__RCSID("$NetBSD: w_scalbf.c,v 1.5 1999/07/02 15:37:45 simonb Exp $");
#endif

/*
 * wrapper scalbf(float x, float 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
	float scalbf(float x, int fn)		/* wrapper scalbf */
#else
	float scalbf(float x, float fn)		/* wrapper scalbf */
#endif
#else
	float scalbf(x,fn)			/* wrapper scalbf */
#ifdef _SCALB_INT
	float x; int fn;
#else
	float x,fn;
#endif
#endif
{
#ifdef _IEEE_LIBM
	return __ieee754_scalbf(x,fn);
#else
	float z;
	z = __ieee754_scalbf(x,fn);
	if(_LIB_VERSION == _IEEE_) return z;
	if(!(finitef(z)||isnanf(z))&&finitef(x)) {
	    /* scalbf overflow */
	    return (float)__kernel_standard((double)x,(double)fn,132);
	}
	if(z==(float)0.0&&z!=x) {
	    /* scalbf underflow */
	    return (float)__kernel_standard((double)x,(double)fn,133);
	}
#ifndef _SCALB_INT
	if(!finitef(fn)) errno = ERANGE;
#endif
	return z;
#endif
}