diff options
Diffstat (limited to 'math/w_logf.c')
| -rw-r--r-- | math/w_logf.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/math/w_logf.c b/math/w_logf.c new file mode 100644 index 0000000000..46d9749114 --- /dev/null +++ b/math/w_logf.c @@ -0,0 +1,49 @@ +/* w_logf.c -- float version of w_log.c. + * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. + */ + +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +#if defined(LIBM_SCCS) && !defined(lint) +static char rcsid[] = "$NetBSD: w_logf.c,v 1.3 1995/05/10 20:49:40 jtc Exp $"; +#endif + +/* + * wrapper logf(x) + */ + +#include <math.h> +#include "math_private.h" + + +#ifdef __STDC__ + float __logf(float x) /* wrapper logf */ +#else + float __logf(x) /* wrapper logf */ + float x; +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_logf(x); +#else + float z; + z = __ieee754_logf(x); + if(_LIB_VERSION == _IEEE_ || __isnanf(x) || x > (float)0.0) return z; + if(x==(float)0.0) + /* logf(0) */ + return (float)__kernel_standard((double)x,(double)x,116); + else + /* logf(x<0) */ + return (float)__kernel_standard((double)x,(double)x,117); +#endif +} +weak_alias (__logf, logf) |