lib/libm/src/s_significand.c

   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  * $NetBSD: s_significand.c,v 1.9 2002/05/26 22:01:58 wiz Exp $
  13  * $DragonFly: src/lib/libm/src/s_significand.c,v 1.1 2005/07/26 21:15:20 joerg Exp $
  14  */
  15
  16 /*
  17  * significand(x) computes just
  18  *      scalb(x, (double) -ilogb(x)),
  19  * for exercising the fraction-part(F) IEEE 754-1985 test vector.
  20  */
  21
  22 #include <math.h>
  23 #include "math_private.h"
  24
  25 double
  26 significand(double x)
  27 {
  28         return scalb(x,(double) -ilogb(x));
  29 }