s_significand.c revision 2116 
1/* @(#)s_signif.c 5.1 93/09/24 */
2/*
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
5 *
6 * Developed at SunPro, a Sun Microsystems, Inc. business.
7 * Permission to use, copy, modify, and distribute this
8 * software is freely granted, provided that this notice
9 * is preserved.
10 * ====================================================
11 */
12
13#ifndef lint
14static char rcsid[] = "$Id: s_significand.c,v 1.4 1994/08/10 20:33:06 jtc Exp $";
15#endif
16
17/*
18 * significand(x) computes just
19 * 	scalb(x, (double) -ilogb(x)),
20 * for exercising the fraction-part(F) IEEE 754-1985 test vector.
21 */
22
23#include "math.h"
24#include "math_private.h"
25
26#ifdef __STDC__
27	double significand(double x)
28#else
29	double significand(x)
30	double x;
31#endif
32{
33	return __ieee754_scalb(x,(double) -ilogb(x));
34}
35