1 /* @(#)w_j1.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_j1.c,v 1.3 1994/02/18 02:27:42 jtc Exp $"; 15 #endif 16 17 /* 18 * wrapper of j1,y1 19 */ 20 21 #include <math.h> 22 23 #ifdef __STDC__ 24 double j1(double x) /* wrapper j1 */ 25 #else 26 double j1(x) /* wrapper j1 */ 27 double x; 28 #endif 29 { 30 #ifdef _IEEE_LIBM 31 return __ieee754_j1(x); 32 #else 33 double z; 34 z = __ieee754_j1(x); 35 if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z; 36 if(fabs(x)>X_TLOSS) { 37 return __kernel_standard(x,x,36); /* j1(|x|>X_TLOSS) */ 38 } else 39 return z; 40 #endif 41 } 42 43 #ifdef __STDC__ 44 double y1(double x) /* wrapper y1 */ 45 #else 46 double y1(x) /* wrapper y1 */ 47 double x; 48 #endif 49 { 50 #ifdef _IEEE_LIBM 51 return __ieee754_y1(x); 52 #else 53 double z; 54 z = __ieee754_y1(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,10); 60 else 61 /* d = zero/(x-x); */ 62 return __kernel_standard(x,x,11); 63 } 64 if(x>X_TLOSS) { 65 return __kernel_standard(x,x,37); /* y1(x>X_TLOSS) */ 66 } else 67 return z; 68 #endif 69 } 70