xref: /openbsd-src/lib/libm/src/s_significand.c (revision 043fbe51c197dbbcd422e917b65f765d8b5f8874)
1df930be7Sderaadt /* @(#)s_signif.c 5.1 93/09/24 */
2df930be7Sderaadt /*
3df930be7Sderaadt  * ====================================================
4df930be7Sderaadt  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
5df930be7Sderaadt  *
6df930be7Sderaadt  * Developed at SunPro, a Sun Microsystems, Inc. business.
7df930be7Sderaadt  * Permission to use, copy, modify, and distribute this
8df930be7Sderaadt  * software is freely granted, provided that this notice
9df930be7Sderaadt  * is preserved.
10df930be7Sderaadt  * ====================================================
11df930be7Sderaadt  */
12df930be7Sderaadt 
13df930be7Sderaadt /*
14df930be7Sderaadt  * significand(x) computes just
15df930be7Sderaadt  * 	scalb(x, (double) -ilogb(x)),
16df930be7Sderaadt  * for exercising the fraction-part(F) IEEE 754-1985 test vector.
17df930be7Sderaadt  */
18df930be7Sderaadt 
19df930be7Sderaadt #include "math.h"
20df930be7Sderaadt #include "math_private.h"
21df930be7Sderaadt 
22e7beb4a7Smillert double
significand(double x)23e7beb4a7Smillert significand(double x)
24df930be7Sderaadt {
25*7b36286aSmartynas 	return scalb(x,(double) -ilogb(x));
26df930be7Sderaadt }
27