1 /* w_log10f.c -- float version of w_log10.c. 2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@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 1.4 1997/10/09 11:35:42 lukem Exp $"); 19 #endif 20 21 /* 22 * wrapper log10f(X) 23 */ 24 25 #include "math.h" 26 #include "math_private.h" 27 28 29 #ifdef __STDC__ 30 float log10f(float x) /* wrapper log10f */ 31 #else 32 float log10f(x) /* wrapper log10f */ 33 float x; 34 #endif 35 { 36 #ifdef _IEEE_LIBM 37 return __ieee754_log10f(x); 38 #else 39 float z; 40 z = __ieee754_log10f(x); 41 if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z; 42 if(x<=(float)0.0) { 43 if(x==(float)0.0) 44 /* log10(0) */ 45 return (float)__kernel_standard((double)x,(double)x,118); 46 else 47 /* log10(x<0) */ 48 return (float)__kernel_standard((double)x,(double)x,119); 49 } else 50 return z; 51 #endif 52 } 53