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f7eac6eb RM |
1 | /* w_log10f.c -- float version of w_log10.c. |
2 | * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. | |
3 | */ | |
4 | ||
5 | /* | |
6 | * ==================================================== | |
7 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. | |
8 | * | |
9 | * Developed at SunPro, a Sun Microsystems, Inc. business. | |
10 | * Permission to use, copy, modify, and distribute this | |
11 | * software is freely granted, provided that this notice | |
12 | * is preserved. | |
13 | * ==================================================== | |
14 | */ | |
15 | ||
16 | #if defined(LIBM_SCCS) && !defined(lint) | |
17 | static char rcsid[] = "$NetBSD: w_log10f.c,v 1.3 1995/05/10 20:49:37 jtc Exp $"; | |
18 | #endif | |
19 | ||
20 | /* | |
21 | * wrapper log10f(X) | |
22 | */ | |
23 | ||
0ecb606c | 24 | #include <math.h> |
f7eac6eb RM |
25 | #include "math_private.h" |
26 | ||
27 | ||
28 | #ifdef __STDC__ | |
29 | float __log10f(float x) /* wrapper log10f */ | |
30 | #else | |
31 | float __log10f(x) /* wrapper log10f */ | |
32 | float x; | |
33 | #endif | |
34 | { | |
35 | #ifdef _IEEE_LIBM | |
36 | return __ieee754_log10f(x); | |
37 | #else | |
38 | float z; | |
39 | z = __ieee754_log10f(x); | |
40 | if(_LIB_VERSION == _IEEE_ || __isnanf(x)) return z; | |
41 | if(x<=(float)0.0) { | |
42 | if(x==(float)0.0) | |
43 | /* log10(0) */ | |
44 | return (float)__kernel_standard((double)x,(double)x,118); | |
45 | else | |
46 | /* log10(x<0) */ | |
47 | return (float)__kernel_standard((double)x,(double)x,119); | |
48 | } else | |
49 | return z; | |
50 | #endif | |
51 | } | |
52 | weak_alias (__log10f, log10f) |