30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
/* w_jnl.c -- long double version of w_jn.c.
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*/
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#if defined(LIBM_SCCS) && !defined(lint)
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static char rcsid[] = "$NetBSD: $";
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#endif
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/*
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* wrapper jn(int n, double x), yn(int n, double x)
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* floating point Bessel's function of the 1st and 2nd kind
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* of order n
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*
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* Special cases:
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* y0(0)=y1(0)=yn(n,0) = -inf with division by zero signal;
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* y0(-ve)=y1(-ve)=yn(n,-ve) are NaN with invalid signal.
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* Note 2. About jn(n,x), yn(n,x)
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* For n=0, j0(x) is called,
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* for n=1, j1(x) is called,
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* for n<x, forward recursion us used starting
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* from values of j0(x) and j1(x).
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* for n>x, a continued fraction approximation to
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* j(n,x)/j(n-1,x) is evaluated and then backward
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* recursion is used starting from a supposed value
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* for j(n,x). The resulting value of j(0,x) is
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* compared with the actual value to correct the
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* supposed value of j(n,x).
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*
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* yn(n,x) is similar in all respects, except
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* that forward recursion is used for all
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* values of n>1.
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*
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*/
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#include <math.h>
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#include <math_private.h>
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#include <math-svid-compat.h>
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#include <libm-alias-ldouble.h>
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#if LIBM_SVID_COMPAT
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long double __jnl(int n, long double x) /* wrapper jnl */
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{
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# ifdef _IEEE_LIBM
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return __ieee754_jnl(n,x);
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# else
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long double z;
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z = __ieee754_jnl(n,x);
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if (_LIB_VERSION == _IEEE_
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|| _LIB_VERSION == _POSIX_
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|| isnan(x))
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return z;
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if(fabsl(x)>X_TLOSS) {
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return __kernel_standard_l((double)n,x,238); /* jn(|x|>X_TLOSS,n) */
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} else
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return z;
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# endif
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}
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libm_alias_ldouble (__jn, jn)
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long double __ynl(int n, long double x) /* wrapper ynl */
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{
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# ifdef _IEEE_LIBM
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return __ieee754_ynl(n,x);
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# else
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long double z;
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z = __ieee754_ynl(n,x);
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if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
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if(x <= 0.0){
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if(x==0.0)
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/* d= -one/(x-x); */
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return __kernel_standard_l((double)n,x,212);
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else
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/* d = zero/(x-x); */
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return __kernel_standard_l((double)n,x,213);
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}
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if(x>X_TLOSS && _LIB_VERSION != _POSIX_) {
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return __kernel_standard_l((double)n,x,239); /* yn(x>X_TLOSS,n) */
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} else
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return z;
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# endif
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}
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libm_alias_ldouble (__yn, yn)
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#endif
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