1 /* w_atanhf.c -- float version of w_atanh.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_atanhf.c,v 1.6 2002/05/26 22:02:00 wiz Exp $"); 19 #endif 20 21 /* 22 * wrapper atanhf(x) 23 */ 24 25 #include "math.h" 26 #include "math_private.h" 27 28 29 float 30 atanhf(float x) /* wrapper atanhf */ 31 { 32 #ifdef _IEEE_LIBM 33 return __ieee754_atanhf(x); 34 #else 35 float z,y; 36 z = __ieee754_atanhf(x); 37 if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z; 38 y = fabsf(x); 39 if(y>=(float)1.0) { 40 if(y>(float)1.0) 41 /* atanhf(|x|>1) */ 42 return (float)__kernel_standard((double)x,(double)x,130); 43 else 44 /* atanhf(|x|==1) */ 45 return (float)__kernel_standard((double)x,(double)x,131); 46 } else 47 return z; 48 #endif 49 } 50