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 | #if defined(LIBM_SCCS) && !defined(lint) |
14 | static char rcsid[] = "$NetBSD: s_significand.c,v 1.6 1995/05/10 20:48:11 jtc Exp $" ; |
15 | #endif |
16 | |
17 | /* |
18 | * significand(x) computes just |
19 | * scalb(x, (double) -ilogb(x)), |
20 | * for exercising the fraction-part(F) IEEE 754-1985 test vector. |
21 | */ |
22 | |
23 | #include <math.h> |
24 | #include <math_private.h> |
25 | |
26 | double __significand(double x) |
27 | { |
28 | return __ieee754_scalb(x,(double) -__ilogb(x)); |
29 | } |
30 | weak_alias (__significand, significand) |
31 | #ifdef NO_LONG_DOUBLE |
32 | strong_alias (__significand, __significandl) |
33 | weak_alias (__significand, significandl) |
34 | #endif |
35 | |