projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| f7eac6eb RM |
1 | /* @(#)w_log.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 | |
| cccda09f | 8 | * software is freely granted, provided that this notice |
| f7eac6eb RM |
9 | * is preserved. |
| 10 | * ==================================================== | |
| 11 | */ | |
| 12 | ||
| 13 | #if defined(LIBM_SCCS) && !defined(lint) | |
| 14 | static char rcsid[] = "$NetBSD: w_log.c,v 1.6 1995/05/10 20:49:33 jtc Exp $"; | |
| 15 | #endif | |
| 16 | ||
| 17 | /* | |
| 18 | * wrapper log(x) | |
| 19 | */ | |
| 20 | ||
| 9d13fb24 | 21 | #include <math.h> |
| f7eac6eb RM |
22 | #include "math_private.h" |
| 23 | ||
| 24 | ||
| 25 | #ifdef __STDC__ | |
| 26 | double __log(double x) /* wrapper log */ | |
| 27 | #else | |
| 28 | double __log(x) /* wrapper log */ | |
| 29 | double x; | |
| 30 | #endif | |
| 31 | { | |
| 32 | #ifdef _IEEE_LIBM | |
| 33 | return __ieee754_log(x); | |
| 34 | #else | |
| 35 | double z; | |
| 36 | z = __ieee754_log(x); | |
| 37 | if(_LIB_VERSION == _IEEE_ || __isnan(x) || x > 0.0) return z; | |
| 38 | if(x==0.0) | |
| 39 | return __kernel_standard(x,x,16); /* log(0) */ | |
| cccda09f | 40 | else |
| f7eac6eb RM |
41 | return __kernel_standard(x,x,17); /* log(x<0) */ |
| 42 | #endif | |
| 43 | } | |
| 44 | weak_alias (__log, log) | |
| cccda09f UD |
45 | #ifdef NO_LONG_DOUBLE |
| 46 | strong_alias (__log, __logl) | |
| 47 | weak_alias (__log, logl) | |
| 48 | #endif |