| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 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 <math_private.h> |
| 19 | #include <errno.h> |
| 20 | |
| 21 | double __ldexp(double value, int exp) |
| 22 | { |
| 23 | if(!isfinite(value)||value==0.0) return value; |
| 24 | value = __scalbn(value,exp); |
| 25 | if(!isfinite(value)||value==0.0) __set_errno (ERANGE); |
| 26 | return value; |
| 27 | } |
| 28 | weak_alias (__ldexp, ldexp) |
| 29 | weak_alias (__ldexp, scalbn) |
| 30 | #ifdef NO_LONG_DOUBLE |
| 31 | strong_alias (__ldexp, __ldexpl) |
| 32 | weak_alias (__ldexp, ldexpl) |
| 33 | weak_alias (__ldexp, scalbnl) |
| 34 | #endif |