w_yn.c - vx32 - Local 9vx git repository for patches.
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       ---
       w_yn.c (1208B)
       ---
            1 /* from: @(#)w_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
           14 static char rcsid[] = "$FreeBSD: src/lib/msun/src/w_yn.c,v 1.5 2002/05/28 18:15:04 alfred Exp $";
           15 #endif
           16 
           17 /*
           18  * wrapper yn(int n, double x)
           19  */
           20 
           21 #include "math.h"
           22 #include "math_private.h"
           23 
           24 double
           25 yn(int n, double x)        /* wrapper yn */
           26 {
           27 #ifdef _IEEE_LIBM
           28         return __ieee754_yn(n,x);
           29 #else
           30         double z;
           31         z = __ieee754_yn(n,x);
           32         if(_LIB_VERSION == _IEEE_ || isnan(x) ) return z;
           33         if(x <= 0.0){
           34                 if(x==0.0)
           35                     /* d= -one/(x-x); */
           36                     return __kernel_standard((double)n,x,12);
           37                 else
           38                     /* d = zero/(x-x); */
           39                     return __kernel_standard((double)n,x,13);
           40         }
           41         if(x>X_TLOSS) {
           42             return __kernel_standard((double)n,x,39); /* yn(x>X_TLOSS,n) */
           43         } else
           44             return z;
           45 #endif
           46 }