s_significand.c revision 2116
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 82116Sjkh * software is freely granted, provided that this notice 92116Sjkh * is preserved. 102116Sjkh * ==================================================== 112116Sjkh */ 122116Sjkh 132116Sjkh#ifndef lint 142116Sjkhstatic char rcsid[] = "$Id: s_significand.c,v 1.4 1994/08/10 20:33:06 jtc Exp $"; 152116Sjkh#endif 162116Sjkh 172116Sjkh/* 182116Sjkh * significand(x) computes just 192116Sjkh * scalb(x, (double) -ilogb(x)), 202116Sjkh * for exercising the fraction-part(F) IEEE 754-1985 test vector. 212116Sjkh */ 222116Sjkh 232116Sjkh#include "math.h" 242116Sjkh#include "math_private.h" 252116Sjkh 262116Sjkh#ifdef __STDC__ 272116Sjkh double significand(double x) 282116Sjkh#else 292116Sjkh double significand(x) 302116Sjkh double x; 312116Sjkh#endif 322116Sjkh{ 332116Sjkh return __ieee754_scalb(x,(double) -ilogb(x)); 342116Sjkh} 35