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52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
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/* w_log10f.c -- float version of w_log10.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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#ifndef lint
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static char rcsid[] = "$Id: w_log10f.c,v 1.1 1994/08/10 20:35:20 jtc Exp $";
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#endif
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/*
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* wrapper log10f(X)
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*/
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#include "math.h"
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#include "math_private.h"
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#ifdef __STDC__
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float log10f(float x) /* wrapper log10f */
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#else
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float log10f(x) /* wrapper log10f */
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float x;
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#endif
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{
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#ifdef _IEEE_LIBM
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return __ieee754_log10f(x);
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#else
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float z;
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z = __ieee754_log10f(x);
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if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
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if(x<=(float)0.0) {
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if(x==(float)0.0)
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/* log10(0) */
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return (float)__kernel_standard((double)x,(double)x,118);
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else
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/* log10(x<0) */
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return (float)__kernel_standard((double)x,(double)x,119);
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} else
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return z;
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#endif
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}
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