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 1.8 1999/07/02 15:37:44 simonb 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 #ifdef __STDC__ 26 double j0(double x) /* wrapper j0 */ 27 #else 28 double j0(x) /* wrapper j0 */ 29 double x; 30 #endif 31 { 32 #ifdef _IEEE_LIBM 33 return __ieee754_j0(x); 34 #else 35 double z = __ieee754_j0(x); 36 if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; 37 if(fabs(x)>X_TLOSS) { 38 return __kernel_standard(x,x,34); /* j0(|x|>X_TLOSS) */ 39 } else 40 return z; 41 #endif 42 } 43 44 #ifdef __STDC__ 45 double y0(double x) /* wrapper y0 */ 46 #else 47 double y0(x) /* wrapper y0 */ 48 double x; 49 #endif 50 { 51 #ifdef _IEEE_LIBM 52 return __ieee754_y0(x); 53 #else 54 double z; 55 z = __ieee754_y0(x); 56 if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z; 57 if(x <= 0.0){ 58 if(x==0.0) 59 /* d= -one/(x-x); */ 60 return __kernel_standard(x,x,8); 61 else 62 /* d = zero/(x-x); */ 63 return __kernel_standard(x,x,9); 64 } 65 if(x>X_TLOSS) { 66 return __kernel_standard(x,x,35); /* y0(x>X_TLOSS) */ 67 } else 68 return z; 69 #endif 70 } 71