12116Sjkh/* @(#)s_signif.c 5.1 93/09/24 */
22116Sjkh/*
32116Sjkh * ====================================================
42116Sjkh * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
52116Sjkh *
62116Sjkh * Developed at SunPro, a Sun Microsystems, Inc. business.
72116Sjkh * Permission to use, copy, modify, and distribute this
88870Srgrimes * software is freely granted, provided that this notice
92116Sjkh * is preserved.
102116Sjkh * ====================================================
112116Sjkh */
122116Sjkh
13176451Sdas#include <sys/cdefs.h>
14176451Sdas__FBSDID("$FreeBSD$");
152116Sjkh
162116Sjkh/*
172116Sjkh * significand(x) computes just
182116Sjkh * 	scalb(x, (double) -ilogb(x)),
192116Sjkh * for exercising the fraction-part(F) IEEE 754-1985 test vector.
202116Sjkh */
212116Sjkh
222116Sjkh#include "math.h"
232116Sjkh#include "math_private.h"
242116Sjkh
2597413Salfreddouble
26117912Spetersignificand(double x)
272116Sjkh{
282116Sjkh	return __ieee754_scalb(x,(double) -ilogb(x));
292116Sjkh}
30