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author | Ulrich Drepper <drepper@redhat.com> | 1999-07-14 00:54:57 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 1999-07-14 00:54:57 +0000 |
commit | abfbdde177c3a7155070dda1b2cdc8292054cc26 (patch) | |
tree | e021306b596381fbf8311d2b7eb294e918ff17c8 /sysdeps/libm-ieee754/w_jn.c | |
parent | 86421aa57ecfd70963ae66848bd6a6dd3b8e0fe6 (diff) | |
download | glibc-abfbdde177c3a7155070dda1b2cdc8292054cc26.tar.gz glibc-abfbdde177c3a7155070dda1b2cdc8292054cc26.tar.xz glibc-abfbdde177c3a7155070dda1b2cdc8292054cc26.zip |
Update.
Diffstat (limited to 'sysdeps/libm-ieee754/w_jn.c')
-rw-r--r-- | sysdeps/libm-ieee754/w_jn.c | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/sysdeps/libm-ieee754/w_jn.c b/sysdeps/libm-ieee754/w_jn.c deleted file mode 100644 index 85fc383fb7..0000000000 --- a/sysdeps/libm-ieee754/w_jn.c +++ /dev/null @@ -1,99 +0,0 @@ -/* @(#)w_jn.c 5.1 93/09/24 */ -/* - * ==================================================== - * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. - * - * Developed at SunPro, a Sun Microsystems, Inc. business. - * Permission to use, copy, modify, and distribute this - * software is freely granted, provided that this notice - * is preserved. - * ==================================================== - */ - -#if defined(LIBM_SCCS) && !defined(lint) -static char rcsid[] = "$NetBSD: w_jn.c,v 1.6 1995/05/10 20:49:19 jtc Exp $"; -#endif - -/* - * wrapper jn(int n, double x), yn(int n, double x) - * floating point Bessel's function of the 1st and 2nd kind - * of order n - * - * Special cases: - * y0(0)=y1(0)=yn(n,0) = -inf with division by zero signal; - * y0(-ve)=y1(-ve)=yn(n,-ve) are NaN with invalid signal. - * Note 2. About jn(n,x), yn(n,x) - * For n=0, j0(x) is called, - * for n=1, j1(x) is called, - * for n<x, forward recursion us used starting - * from values of j0(x) and j1(x). - * for n>x, a continued fraction approximation to - * j(n,x)/j(n-1,x) is evaluated and then backward - * recursion is used starting from a supposed value - * for j(n,x). The resulting value of j(0,x) is - * compared with the actual value to correct the - * supposed value of j(n,x). - * - * yn(n,x) is similar in all respects, except - * that forward recursion is used for all - * values of n>1. - * - */ - -#include "math.h" -#include "math_private.h" - -#ifdef __STDC__ - double jn(int n, double x) /* wrapper jn */ -#else - double jn(n,x) /* wrapper jn */ - double x; int n; -#endif -{ -#ifdef _IEEE_LIBM - return __ieee754_jn(n,x); -#else - double z; - z = __ieee754_jn(n,x); - if(_LIB_VERSION == _IEEE_ || __isnan(x) ) return z; - if(fabs(x)>X_TLOSS) { - return __kernel_standard((double)n,x,38); /* jn(|x|>X_TLOSS,n) */ - } else - return z; -#endif -} -#ifdef NO_LONG_DOUBLE -strong_alias (jn, jnl) -#endif - - -#ifdef __STDC__ - double yn(int n, double x) /* wrapper yn */ -#else - double yn(n,x) /* wrapper yn */ - double x; int n; -#endif -{ -#ifdef _IEEE_LIBM - return __ieee754_yn(n,x); -#else - double z; - z = __ieee754_yn(n,x); - if(_LIB_VERSION == _IEEE_ || __isnan(x) ) return z; - if(x <= 0.0){ - if(x==0.0) - /* d= -one/(x-x); */ - return __kernel_standard((double)n,x,12); - else - /* d = zero/(x-x); */ - return __kernel_standard((double)n,x,13); - } - if(x>X_TLOSS) { - return __kernel_standard((double)n,x,39); /* yn(x>X_TLOSS,n) */ - } else - return z; -#endif -} -#ifdef NO_LONG_DOUBLE -strong_alias (yn, ynl) -#endif |