174                 FIXP_DBL vr,vi,ur,ui;  in dit_fft()  local
181                 ui = x[t1+1]>>1;  in dit_fft()
184                 x[t1+1] = ui+vi;  in dit_fft()
187                 x[t2+1] = ui-vi;  in dit_fft()
197                 ui = x[t1+1]>>1;  in dit_fft()
200                 x[t1+1] = ui-vi;  in dit_fft()
203                 x[t2+1] = ui+vi;  in dit_fft()
216                 FIXP_DBL vr,vi,ur,ui;  in dit_fft()  local
221                 ui = x[t1+1]>>1;  in dit_fft()
224                 x[t1+1] = ui+vi;  in dit_fft()
227                 x[t2+1] = ui-vi;  in dit_fft()
235                 ui = x[t1+1]>>1;  in dit_fft()
238                 x[t1+1] = ui-vi;  in dit_fft()
241                 x[t2+1] = ui+vi;  in dit_fft()
250                 ui = x[t1+1]>>1;  in dit_fft()
253                 x[t1+1] = ui-vi;  in dit_fft()
256                 x[t2+1] = ui+vi;  in dit_fft()
264                 ui = x[t1+1]>>1;  in dit_fft()
267                 x[t1+1] = ui-vi;  in dit_fft()
270                 x[t2+1] = ui+vi;  in dit_fft()
280                 FIXP_DBL vr,vi,ur,ui;  in dit_fft()  local
285                 ui = x[t1+1]>>1;  in dit_fft()
288                 x[t1+1] = ui+vi;  in dit_fft()
291                 x[t2+1] = ui-vi;  in dit_fft()
299                 ui = x[t1+1]>>1;  in dit_fft()
302                 x[t1+1] = ui-vi;  in dit_fft()
305                 x[t2+1] = ui+vi;  in dit_fft()
376                 FIXP_DBL vr,vi,ur,ui;  in dit_ifft()  local
383                 ui = x[t1+1]>>1;  in dit_ifft()
386                 x[t1+1] = ui+vi;  in dit_ifft()
389                 x[t2+1] = ui-vi;  in dit_ifft()
399                 ui = x[t1+1]>>1;  in dit_ifft()
402                 x[t1+1] = ui+vi;  in dit_ifft()
405                 x[t2+1] = ui-vi;  in dit_ifft()
418                 FIXP_DBL vr,vi,ur,ui;  in dit_ifft()  local
423                 ui = x[t1+1]>>1;  in dit_ifft()
426                 x[t1+1] = ui+vi;  in dit_ifft()
429                 x[t2+1] = ui-vi;  in dit_ifft()
437                 ui = x[t1+1]>>1;  in dit_ifft()
440                 x[t1+1] = ui+vi;  in dit_ifft()
443                 x[t2+1] = ui-vi;  in dit_ifft()
452                 ui = x[t1+1]>>1;  in dit_ifft()
455                 x[t1+1] = ui+vi;  in dit_ifft()
458                 x[t2+1] = ui-vi;  in dit_ifft()
466                 ui = x[t1+1]>>1;  in dit_ifft()
469                 x[t1+1] = ui-vi;  in dit_ifft()
472                 x[t2+1] = ui+vi;  in dit_ifft()
481                 FIXP_DBL vr,vi,ur,ui;  in dit_ifft()  local
486                 ui = x[t1+1]>>1;  in dit_ifft()
489                 x[t1+1] = ui+vi;  in dit_ifft()
492                 x[t2+1] = ui-vi;  in dit_ifft()
500                 ui = x[t1+1]>>1;  in dit_ifft()
503                 x[t1+1] = ui+vi;  in dit_ifft()
506                 x[t2+1] = ui-vi;  in dit_ifft()