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 __FBSDID("$FreeBSD$");
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
significand(double x)26 significand(double x)
27 {
28 return __ieee754_scalb(x,(double) -ilogb(x));
29 }
30