1 /* w_logf.c -- float version of w_log.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_logf.c,v 1.6 2002/05/26 22:02:02 wiz Exp $"); 19 #endif 20 21 /* 22 * wrapper logf(x) 23 */ 24 25 #include "math.h" 26 #include "math_private.h" 27 28 29 float 30 logf(float x) /* wrapper logf */ 31 { 32 #ifdef _IEEE_LIBM 33 return __ieee754_logf(x); 34 #else 35 float z; 36 z = __ieee754_logf(x); 37 if(_LIB_VERSION == _IEEE_ || isnanf(x) || x > (float)0.0) return z; 38 if(x==(float)0.0) 39 /* logf(0) */ 40 return (float)__kernel_standard((double)x,(double)x,116); 41 else 42 /* logf(x<0) */ 43 return (float)__kernel_standard((double)x,(double)x,117); 44 #endif 45 } 46