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 1.5 1999/07/02 15:37:44 simonb Exp $"); 19 #endif 20 21 /* 22 * wrapper atanhf(x) 23 */ 24 25 #include "math.h" 26 #include "math_private.h" 27 28 29 #ifdef __STDC__ 30 float atanhf(float x) /* wrapper atanhf */ 31 #else 32 float atanhf(x) /* wrapper atanhf */ 33 float x; 34 #endif 35 { 36 #ifdef _IEEE_LIBM 37 return __ieee754_atanhf(x); 38 #else 39 float z,y; 40 z = __ieee754_atanhf(x); 41 if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z; 42 y = fabsf(x); 43 if(y>=(float)1.0) { 44 if(y>(float)1.0) 45 /* atanhf(|x|>1) */ 46 return (float)__kernel_standard((double)x,(double)x,130); 47 else 48 /* atanhf(|x|==1) */ 49 return (float)__kernel_standard((double)x,(double)x,131); 50 } else 51 return z; 52 #endif 53 } 54