| e_jn.c (2117) | e_jn.c (7658) |
|---|---|
| 1/* @(#)e_jn.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 | 1/* @(#)e_jn.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 |
| 14static char rcsid[] = "$Id: e_jn.c,v 1.6 1994/08/18 23:05:37 jtc Exp $"; | 14static char rcsid[] = "$Id: e_jn.c,v 1.1.1.1 1994/08/19 09:39:44 jkh Exp $"; |
| 15#endif 16 17/* 18 * __ieee754_jn(n, x), __ieee754_yn(n, x) 19 * floating point Bessel's function of the 1st and 2nd kind 20 * of order n 21 * 22 * Special cases: --- 210 unchanged lines hidden (view full) --- 233 ix = 0x7fffffff&hx; 234 /* if Y(n,NaN) is NaN */ 235 if((ix|((u_int32_t)(lx|-lx))>>31)>0x7ff00000) return x+x; 236 if((ix|lx)==0) return -one/zero; 237 if(hx<0) return zero/zero; 238 sign = 1; 239 if(n<0){ 240 n = -n; | 15#endif 16 17/* 18 * __ieee754_jn(n, x), __ieee754_yn(n, x) 19 * floating point Bessel's function of the 1st and 2nd kind 20 * of order n 21 * 22 * Special cases: --- 210 unchanged lines hidden (view full) --- 233 ix = 0x7fffffff&hx; 234 /* if Y(n,NaN) is NaN */ 235 if((ix|((u_int32_t)(lx|-lx))>>31)>0x7ff00000) return x+x; 236 if((ix|lx)==0) return -one/zero; 237 if(hx<0) return zero/zero; 238 sign = 1; 239 if(n<0){ 240 n = -n; |
| 241 sign = 1 - ((n&1)<<2); | 241 sign = 1 - ((n&1)<<1); |
| 242 } 243 if(n==0) return(__ieee754_y0(x)); 244 if(n==1) return(sign*__ieee754_y1(x)); 245 if(ix==0x7ff00000) return zero; 246 if(ix>=0x52D00000) { /* x > 2**302 */ 247 /* (x >> n**2) 248 * Jn(x) = cos(x-(2n+1)*pi/4)*sqrt(2/x*pi) 249 * Yn(x) = sin(x-(2n+1)*pi/4)*sqrt(2/x*pi) --- 32 unchanged lines hidden --- | 242 } 243 if(n==0) return(__ieee754_y0(x)); 244 if(n==1) return(sign*__ieee754_y1(x)); 245 if(ix==0x7ff00000) return zero; 246 if(ix>=0x52D00000) { /* x > 2**302 */ 247 /* (x >> n**2) 248 * Jn(x) = cos(x-(2n+1)*pi/4)*sqrt(2/x*pi) 249 * Yn(x) = sin(x-(2n+1)*pi/4)*sqrt(2/x*pi) --- 32 unchanged lines hidden --- |