1 
2 extern void cpass(complex *,const complex *,const complex *,unsigned int);
3 extern void upass(complex *,const complex *,const complex *,unsigned int);
4 extern void rpass(real *,const complex *,unsigned int);
5 extern void vpass(real *,const complex *,unsigned int);
6 
7 extern const complex d16[];
8 extern const complex d32[];
9 extern const complex d64[];
10 extern const complex d128[];
11 extern const complex d256[];
12 extern const complex d512[];
13 extern const complex d1024[];
14 extern const complex d2048[];
15 extern const complex d4096[];
16 extern const complex d8192[];
17 extern const complex d16384[];
18 extern const complex d32768[];
19 extern const complex d65536[];
20 
21 #define sqrthalf (d16[1].re)
22