Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4973 | right-hear | 1 | /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */ |
| 2 | /* w_log10f.c -- float version of w_log10.c. |
||
| 3 | * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. |
||
| 4 | */ |
||
| 5 | |||
| 6 | /* |
||
| 7 | * ==================================================== |
||
| 8 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
||
| 9 | * |
||
| 10 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
||
| 11 | * Permission to use, copy, modify, and distribute this |
||
| 12 | * software is freely granted, provided that this notice |
||
| 13 | * is preserved. |
||
| 14 | * ==================================================== |
||
| 15 | */ |
||
| 16 | |||
| 17 | #if defined(LIBM_SCCS) && !defined(lint) |
||
| 18 | static char rcsid[] = "$Id: w_log10f.c,v 1.1 1994/08/10 20:35:20 jtc Exp $"; |
||
| 19 | #endif |
||
| 20 | |||
| 21 | /* |
||
| 22 | * wrapper log10f(X) |
||
| 23 | */ |
||
| 24 | |||
| 25 | #include "math.h" |
||
| 26 | #include "math_private.h" |
||
| 27 | |||
| 28 | |||
| 29 | #ifdef __STDC__ |
||
| 30 | float log10f(float x) /* wrapper log10f */ |
||
| 31 | #else |
||
| 32 | float log10f(x) /* wrapper log10f */ |
||
| 33 | float x; |
||
| 34 | #endif |
||
| 35 | { |
||
| 36 | #ifdef _IEEE_LIBM |
||
| 37 | return __ieee754_log10f(x); |
||
| 38 | #else |
||
| 39 | float z; |
||
| 40 | z = __ieee754_log10f(x); |
||
| 41 | if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z; |
||
| 42 | if(x<=(float)0.0) { |
||
| 43 | if(x==(float)0.0) |
||
| 44 | /* log10(0) */ |
||
| 45 | return (float)__kernel_standard((double)x,(double)x,118); |
||
| 46 | else |
||
| 47 | /* log10(x<0) */ |
||
| 48 | return (float)__kernel_standard((double)x,(double)x,119); |
||
| 49 | } else |
||
| 50 | return z; |
||
| 51 | #endif |
||
| 52 | } |