24 jnf(int n, float x)  in jnf()  argument
30     /* J(-n,x) = (-1)^n * J(n, x), J(n, -x) = (-1)^n * J(n, x)  in jnf()
31      * Thus, J(-n,x) = J(n,-x)  in jnf()
35     /* if J(n,NaN) is NaN */  in jnf()
38     if (n < 0) {  in jnf()
39         n = -n;  in jnf()
43     if (n == 0)  in jnf()
45     if (n == 1)  in jnf()
47     sgn = (n & 1) & (hx >> 31); /* even n -- 0, odd n -- sign(x) */  in jnf()
51     else if ((float)n <= x) {  in jnf()
52         /* Safe to use J(n+1,x)=2n/x *J(n,x)-J(n-1,x) */  in jnf()
55         for (i = 1; i < n; i++) {  in jnf()
62             /* x is tiny, return the first Taylor expansion of J(n,x)  in jnf()
63      * J(n,x) = 1/n!*(x/2)^n  - ...  in jnf()
65             if (n > 33) /* underflow */  in jnf()
70                 for (a = one, i = 2; i <= n; i++) {  in jnf()
71                     a *= (float)i; /* a = n! */  in jnf()
72                     b *= temp; /* b = (x/2)^n */  in jnf()
79 		 *  J(n,x)/J(n-1,x) =  ----   ------   ------   .....  in jnf()
80 		 *			2n  - 2(n+1) - 2(n+2)  in jnf()
84 		 *			2n   2(n+1)   2(n+2)  in jnf()
88 		 * Let w = 2n/x and h=2/x, then the above quotient  in jnf()
109             w = (n + n) / (float)x;  in jnf()
122             m = n + n;  in jnf()
123             for (t = zero, i = 2 * (n + k); i >= m; i -= 2)  in jnf()
127             /*  estimate log((2/x)^n*n!) = n*log(2/x)+n*ln(n)  in jnf()
128 		 *  Hence, if n*(log(2n/x)) > ...  in jnf()
135             tmp = n;  in jnf()
139                 for (i = n - 1, di = (float)(i + i); i > 0; i--) {  in jnf()
147                 for (i = n - 1, di = (float)(i + i); i > 0; i--) {  in jnf()
171 ynf(int n, float x)  in ynf()  argument
193     if (n < 0) {  in ynf()
194         n = -n;  in ynf()
195         sign = 1 - ((n & 1) << 1);  in ynf()
197     if (n == 0)  in ynf()
199     if (n == 1)  in ynf()
206     for (i = 1; i < n && ib != (__int32_t)0xff800000; i++) {  in ynf()