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51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
/* from: @(#)w_jn.c 5.1 93/09/24 */
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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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#ifndef lint
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static char rcsid[] = "$FreeBSD$";
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#endif
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/*
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* wrapper yn(int n, double x)
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*/
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#include "math.h"
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#include "math_private.h"
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#ifdef __STDC__
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double yn(int n, double x) /* wrapper yn */
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#else
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double yn(n,x) /* wrapper yn */
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double x; int n;
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#endif
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{
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#ifdef _IEEE_LIBM
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return __ieee754_yn(n,x);
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#else
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double z;
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z = __ieee754_yn(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((double)n,x,12);
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else
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/* d = zero/(x-x); */
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return __kernel_standard((double)n,x,13);
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}
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if(x>X_TLOSS) {
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return __kernel_standard((double)n,x,39); /* 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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