Merge branch 'master' of ssh://sources.redhat.com/git/glibc
[glibc.git] / math / w_logf.c
blob46d97491147b6fa6523730e06b68c834e65c501a
1 /* w_logf.c -- float version of w_log.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 */
5 /*
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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 * ====================================================
16 #if defined(LIBM_SCCS) && !defined(lint)
17 static char rcsid[] = "$NetBSD: w_logf.c,v 1.3 1995/05/10 20:49:40 jtc Exp $";
18 #endif
21 * wrapper logf(x)
24 #include <math.h>
25 #include "math_private.h"
28 #ifdef __STDC__
29 float __logf(float x) /* wrapper logf */
30 #else
31 float __logf(x) /* wrapper logf */
32 float x;
33 #endif
35 #ifdef _IEEE_LIBM
36 return __ieee754_logf(x);
37 #else
38 float z;
39 z = __ieee754_logf(x);
40 if(_LIB_VERSION == _IEEE_ || __isnanf(x) || x > (float)0.0) return z;
41 if(x==(float)0.0)
42 /* logf(0) */
43 return (float)__kernel_standard((double)x,(double)x,116);
44 else
45 /* logf(x<0) */
46 return (float)__kernel_standard((double)x,(double)x,117);
47 #endif
49 weak_alias (__logf, logf)