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 #ifndef lint 14 static char rcsid[] = "$Id: w_j0.c,v 1.3 1994/02/18 02:27:38 jtc Exp $"; 15 #endif 16 17 /* 18 * wrapper j0(double x), y0(double x) 19 */ 20 21 #include <math.h> 22 23 #ifdef __STDC__ 24 double j0(double x) /* wrapper j0 */ 25 #else 26 double j0(x) /* wrapper j0 */ 27 double x; 28 #endif 29 { 30 #ifdef _IEEE_LIBM 31 return __ieee754_j0(x); 32 #else 33 double z = __ieee754_j0(x); 34 if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; 35 if(fabs(x)>X_TLOSS) { 36 return __kernel_standard(x,x,34); /* j0(|x|>X_TLOSS) */ 37 } else 38 return z; 39 #endif 40 } 41 42 #ifdef __STDC__ 43 double y0(double x) /* wrapper y0 */ 44 #else 45 double y0(x) /* wrapper y0 */ 46 double x; 47 #endif 48 { 49 #ifdef _IEEE_LIBM 50 return __ieee754_y0(x); 51 #else 52 double z; 53 z = __ieee754_y0(x); 54 if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z; 55 if(x <= 0.0){ 56 if(x==0.0) 57 /* d= -one/(x-x); */ 58 return __kernel_standard(x,x,8); 59 else 60 /* d = zero/(x-x); */ 61 return __kernel_standard(x,x,9); 62 } 63 if(x>X_TLOSS) { 64 return __kernel_standard(x,x,35); /* y0(x>X_TLOSS) */ 65 } else 66 return z; 67 #endif 68 } 69