1*2fe8fb19SBen Gras /* w_logf.c -- float version of w_log.c.
2*2fe8fb19SBen Gras * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3*2fe8fb19SBen Gras */
4*2fe8fb19SBen Gras
5*2fe8fb19SBen Gras /*
6*2fe8fb19SBen Gras * ====================================================
7*2fe8fb19SBen Gras * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8*2fe8fb19SBen Gras *
9*2fe8fb19SBen Gras * Developed at SunPro, a Sun Microsystems, Inc. business.
10*2fe8fb19SBen Gras * Permission to use, copy, modify, and distribute this
11*2fe8fb19SBen Gras * software is freely granted, provided that this notice
12*2fe8fb19SBen Gras * is preserved.
13*2fe8fb19SBen Gras * ====================================================
14*2fe8fb19SBen Gras */
15*2fe8fb19SBen Gras
16*2fe8fb19SBen Gras #include <sys/cdefs.h>
17*2fe8fb19SBen Gras #if defined(LIBM_SCCS) && !defined(lint)
18*2fe8fb19SBen Gras __RCSID("$NetBSD: w_logf.c,v 1.7 2007/08/20 16:01:40 drochner Exp $");
19*2fe8fb19SBen Gras #endif
20*2fe8fb19SBen Gras
21*2fe8fb19SBen Gras /*
22*2fe8fb19SBen Gras * wrapper logf(x)
23*2fe8fb19SBen Gras */
24*2fe8fb19SBen Gras
25*2fe8fb19SBen Gras #include "namespace.h"
26*2fe8fb19SBen Gras #include "math.h"
27*2fe8fb19SBen Gras #include "math_private.h"
28*2fe8fb19SBen Gras
29*2fe8fb19SBen Gras #ifdef __weak_alias
__weak_alias(logf,_logf)30*2fe8fb19SBen Gras __weak_alias(logf, _logf)
31*2fe8fb19SBen Gras #endif
32*2fe8fb19SBen Gras
33*2fe8fb19SBen Gras float
34*2fe8fb19SBen Gras logf(float x) /* wrapper logf */
35*2fe8fb19SBen Gras {
36*2fe8fb19SBen Gras #ifdef _IEEE_LIBM
37*2fe8fb19SBen Gras return __ieee754_logf(x);
38*2fe8fb19SBen Gras #else
39*2fe8fb19SBen Gras float z;
40*2fe8fb19SBen Gras z = __ieee754_logf(x);
41*2fe8fb19SBen Gras if(_LIB_VERSION == _IEEE_ || isnanf(x) || x > (float)0.0) return z;
42*2fe8fb19SBen Gras if(x==(float)0.0)
43*2fe8fb19SBen Gras /* logf(0) */
44*2fe8fb19SBen Gras return (float)__kernel_standard((double)x,(double)x,116);
45*2fe8fb19SBen Gras else
46*2fe8fb19SBen Gras /* logf(x<0) */
47*2fe8fb19SBen Gras return (float)__kernel_standard((double)x,(double)x,117);
48*2fe8fb19SBen Gras #endif
49*2fe8fb19SBen Gras }
50