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/* wf_log10.c -- float version of w_log10.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.
* ====================================================
*/
/*
* wrapper log10f(X)
*/
#include "fdlibm.h"
#include <errno.h>
#ifdef __STDC__
float log10f(float x) /* wrapper log10f */
#else
float log10f(x) /* wrapper log10f */
float x;
#endif
{
#ifdef _IEEE_LIBM
return __ieee754_log10f(x);
#else
float z;
z = __ieee754_log10f(x);
if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
if(x<=0.0f) {
#ifndef HUGE_VAL
#define HUGE_VAL inf
double inf = 0.0;
SET_HIGH_WORD(inf,0x7ff00000); /* set inf to infinite */
#endif
if(x==0.0f) {
/* log10f(0) */
errno = ERANGE;
return (float)-HUGE_VAL;
} else {
/* log10f(x<0) */
errno = EDOM;
return nan("");
}
} else
return z;
#endif
}
#ifdef _DOUBLE_IS_32BITS
#ifdef __STDC__
double log10(double x)
#else
double log10(x)
double x;
#endif
{
return (double) log10f((float) x);
}
#endif /* defined(_DOUBLE_IS_32BITS) */
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