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      1 /* w_log10f.c -- float version of w_log10.c.
      2  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian (at) cygnus.com.
      3  */
      4 
      5 /*
      6  * ====================================================
      7  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
      8  *
      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  * ====================================================
     14  */
     15 
     16 #include <sys/cdefs.h>
     17 #if defined(LIBM_SCCS) && !defined(lint)
     18 __RCSID("$NetBSD: w_log10f.c,v 1.7 2024/07/16 14:52:50 riastradh Exp $");
     19 #endif
     20 
     21 /*
     22  * wrapper log10f(X)
     23  */
     24 
     25 #include "namespace.h"
     26 
     27 #include "math.h"
     28 #include "math_private.h"
     29 
     30 __weak_alias(log10f, _log10f)
     31 float
     32 log10f(float x)		/* wrapper log10f */
     33 {
     34 #ifdef _IEEE_LIBM
     35 	return __ieee754_log10f(x);
     36 #else
     37 	float z;
     38 	z = __ieee754_log10f(x);
     39 	if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
     40 	if(x<=(float)0.0) {
     41 	    if(x==(float)0.0)
     42 	        /* log10(0) */
     43 	        return (float)__kernel_standard((double)x,(double)x,118);
     44 	    else
     45 	        /* log10(x<0) */
     46 	        return (float)__kernel_standard((double)x,(double)x,119);
     47 	} else
     48 	    return z;
     49 #endif
     50 }
     51