1 /* @(#)w_j0.c 5.1 93/09/24 */ 2 /* 3 * ==================================================== 4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 5 * 6 * Developed at SunPro, a Sun Microsystems, Inc. business. 7 * Permission to use, copy, modify, and distribute this 8 * software is freely granted, provided that this notice 9 * is preserved. 10 * ==================================================== 11 */ 12 13 #include <sys/cdefs.h> 14 #if defined(LIBM_SCCS) && !defined(lint) 15 __RCSID("$NetBSD: w_j0.c,v 1.9 2002/05/26 22:02:01 wiz Exp $"); 16 #endif 17 18 /* 19 * wrapper j0(double x), y0(double x) 20 */ 21 22 #include "math.h" 23 #include "math_private.h" 24 25 double 26 j0(double x) /* wrapper j0 */ 27 { 28 #ifdef _IEEE_LIBM 29 return __ieee754_j0(x); 30 #else 31 double z = __ieee754_j0(x); 32 if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; 33 if(fabs(x)>X_TLOSS) { 34 return __kernel_standard(x,x,34); /* j0(|x|>X_TLOSS) */ 35 } else 36 return z; 37 #endif 38 } 39 40 double 41 y0(double x) /* wrapper y0 */ 42 { 43 #ifdef _IEEE_LIBM 44 return __ieee754_y0(x); 45 #else 46 double z; 47 z = __ieee754_y0(x); 48 if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z; 49 if(x <= 0.0){ 50 if(x==0.0) 51 /* d= -one/(x-x); */ 52 return __kernel_standard(x,x,8); 53 else 54 /* d = zero/(x-x); */ 55 return __kernel_standard(x,x,9); 56 } 57 if(x>X_TLOSS) { 58 return __kernel_standard(x,x,35); /* y0(x>X_TLOSS) */ 59 } else 60 return z; 61 #endif 62 } 63