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#include <sys/cdefs.h> 14#if defined(LIBM_SCCS) && !defined(lint) 15__RCSID("$NetBSD: s_significand.c,v 1.8 1999/07/02 15:37:43 simonb Exp $"); 16#endif 17 18/* 19 * significand(x) computes just 20 * scalb(x, (double) -ilogb(x)), 21 * for exercising the fraction-part(F) IEEE 754-1985 test vector. 22 */ 23 24#include "math.h" 25#include "math_private.h" 26 27double 28significand(double x) 29{ 30 return __ieee754_scalb(x,(double) -ilogb(x)); 31} 32