50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/* w_logf.c -- float version of w_log.c.
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* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
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*/
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#include <sys/cdefs.h>
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#if defined(LIBM_SCCS) && !defined(lint)
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__RCSID("$NetBSD: w_logf.c,v 1.7 2007/08/20 16:01:40 drochner Exp $");
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#endif
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/*
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* wrapper logf(x)
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*/
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#include "namespace.h"
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#include "math.h"
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#include "math_private.h"
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#ifdef __weak_alias
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__weak_alias(logf, _logf)
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#endif
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float
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logf(float x) /* wrapper logf */
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{
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#ifdef _IEEE_LIBM
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return __ieee754_logf(x);
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#else
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float z;
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z = __ieee754_logf(x);
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if(_LIB_VERSION == _IEEE_ || isnanf(x) || x > (float)0.0) return z;
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if(x==(float)0.0)
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/* logf(0) */
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return (float)__kernel_standard((double)x,(double)x,116);
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else
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/* logf(x<0) */
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return (float)__kernel_standard((double)x,(double)x,117);
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#endif
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}
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