1 | /* @(#)s_ldexp.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_ldexp.c,v 1.6 1995/05/10 20:47:40 jtc Exp $" ; |
15 | #endif |
16 | |
17 | #include <math.h> |
18 | #include <errno.h> |
19 | |
20 | FLOAT |
21 | M_SUF (__ldexp) (FLOAT value, int exp) |
22 | { |
23 | if(!isfinite(value)||value==0) return value + value; |
24 | value = M_SCALBN(value,exp); |
25 | if(!isfinite(value)||value==0) __set_errno (ERANGE); |
26 | return value; |
27 | } |
28 | |
29 | declare_mgen_alias (__ldexp, ldexp) |
30 | strong_alias (M_SUF (__ldexp), M_SUF (__wrap_scalbn)) |
31 | declare_mgen_alias (__wrap_scalbn, scalbn) |
32 | |
33 | /* Note, versioning issues are punted to ldbl-opt in this case. */ |
34 | |