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 #if defined(LIBM_SCCS) && !defined(lint) 14 static char rcsid[] = "$Id: w_j0.c,v 1.5 1994/09/22 16:45:44 jtc Exp $"; 15 #endif 16 17 /* 18 * wrapper j0(double x), y0(double x) 19 */ 20 21 #include "math.h" 22 #include "math_private.h" 23 24 #ifdef __STDC__ 25 double j0(double x) /* wrapper j0 */ 26 #else 27 double j0(x) /* wrapper j0 */ 28 double x; 29 #endif 30 { 31 #ifdef _IEEE_LIBM 32 return __ieee754_j0(x); 33 #else 34 double z = __ieee754_j0(x); 35 if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; 36 if(fabs(x)>X_TLOSS) { 37 return __kernel_standard(x,x,34); /* j0(|x|>X_TLOSS) */ 38 } else 39 return z; 40 #endif 41 } 42 43 #ifdef __STDC__ 44 double y0(double x) /* wrapper y0 */ 45 #else 46 double y0(x) /* wrapper y0 */ 47 double x; 48 #endif 49 { 50 #ifdef _IEEE_LIBM 51 return __ieee754_y0(x); 52 #else 53 double z; 54 z = __ieee754_y0(x); 55 if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z; 56 if(x <= 0.0){ 57 if(x==0.0) 58 /* d= -one/(x-x); */ 59 return __kernel_standard(x,x,8); 60 else 61 /* d = zero/(x-x); */ 62 return __kernel_standard(x,x,9); 63 } 64 if(x>X_TLOSS) { 65 return __kernel_standard(x,x,35); /* y0(x>X_TLOSS) */ 66 } else 67 return z; 68 #endif 69 } 70