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 /* 15 * significand(x) computes just 16 * scalb(x, (double) -ilogb(x)), 17 * for exercising the fraction-part(F) IEEE 754-1985 test vector. 18 */ 19 20 #include "math.h" 21 #include "math_private.h" 22 23 double 24 significand(double x) 25 { 26 return scalb(x,(double) -ilogb(x)); 27 } 28