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 #if defined(LIBM_SCCS) && !defined(lint) 17 static char rcsid[] = "$Id: w_atanhf.c,v 1.2 1994/09/22 16:45:28 jtc Exp $"; 18 #endif 19 20 /* 21 * wrapper atanhf(x) 22 */ 23 24 #include "math.h" 25 #include "math_private.h" 26 27 28 #ifdef __STDC__ 29 float atanhf(float x) /* wrapper atanhf */ 30 #else 31 float atanhf(x) /* wrapper atanhf */ 32 float x; 33 #endif 34 { 35 #ifdef _IEEE_LIBM 36 return __ieee754_atanhf(x); 37 #else 38 float z,y; 39 z = __ieee754_atanhf(x); 40 if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z; 41 y = fabsf(x); 42 if(y>=(float)1.0) { 43 if(y>(float)1.0) 44 /* atanhf(|x|>1) */ 45 return (float)__kernel_standard((double)x,(double)x,130); 46 else 47 /* atanhf(|x|==1) */ 48 return (float)__kernel_standard((double)x,(double)x,131); 49 } else 50 return z; 51 #endif 52 } 53