1 
2 /* @(#)s_signif.c 5.1 93/09/24 */
3 /*
4  * ====================================================
5  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
6  *
7  * Developed at SunPro, a Sun Microsystems, Inc. business.
8  * Permission to use, copy, modify, and distribute this
9  * software is freely granted, provided that this notice
10  * is preserved.
11  * ====================================================
12  */
13 
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 "fdlibm.h"
21 
22 #ifndef _DOUBLE_IS_32BITS
23 
24 #ifdef __STDC__
significand(double x)25 	double significand(double x)
26 #else
27 	double significand(x)
28 	double x;
29 #endif
30 {
31 	return __ieee754_scalb(x,(double) -ilogb(x));
32 }
33 
34 #endif /* _DOUBLE_IS_32BITS */
35