rows=8  columns=4
input data (symbolic format: R00C):
  0:       0      1      2      3 
  1:    1000   1001   1002   1003 
  2:    2000   2001   2002   2003 
  3:    3000   3001   3002   3003 
  4:    4000   4001   4002   4003 
  5:    5000   5001   5002   5003 
  6:    6000   6001   6002   6003 
  7:    7000   7001   7002   7003 

FULL REVBIN_PERMUTE for transposition:
  0:       0   4000   2000   6000   1000   5000   3000   7000 
  1:       2   4002   2002   6002   1002   5002   3002   7002 
  2:       1   4001   2001   6001   1001   5001   3001   7001 
  3:       3   4003   2003   6003   1003   5003   3003   7003 

DIT FFTs on revbin_permuted rows (in revbin_permuted sequence), i.e. unrevbin_permute rows:
 (apply weight after each FFT)
  0:       0   1000   2000   3000   4000   5000   6000   7000 
  1:       2   1002   2002   3002   4002   5002   6002   7002 
  2:       1   1001   2001   3001   4001   5001   6001   7001 
  3:       3   1003   2003   3003   4003   5003   6003   7003 

FULL REVBIN_PERMUTE for transposition:
  0:       0      1      2      3 
  1:    4000   4001   4002   4003 
  2:    2000   2001   2002   2003 
  3:    6000   6001   6002   6003 
  4:    1000   1001   1002   1003 
  5:    5000   5001   5002   5003 
  6:    3000   3001   3002   3003 
  7:    7000   7001   7002   7003 

CONVOLUTIONS on rows (don't care revbin_permuted sequence), no reordering. 

FULL REVBIN_PERMUTE for transposition:
  0:       0   1000   2000   3000   4000   5000   6000   7000 
  1:       2   1002   2002   3002   4002   5002   6002   7002 
  2:       1   1001   2001   3001   4001   5001   6001   7001 
  3:       3   1003   2003   3003   4003   5003   6003   7003 

 (apply inverse weight before each FFT)
DIF FFTs on rows (in revbin_permuted sequence), i.e. revbin_permute rows:
  0:       0   4000   2000   6000   1000   5000   3000   7000 
  1:       2   4002   2002   6002   1002   5002   3002   7002 
  2:       1   4001   2001   6001   1001   5001   3001   7001 
  3:       3   4003   2003   6003   1003   5003   3003   7003 

FULL REVBIN_PERMUTE for transposition:
  0:       0      1      2      3 
  1:    1000   1001   1002   1003 
  2:    2000   2001   2002   2003 
  3:    3000   3001   3002   3003 
  4:    4000   4001   4002   4003 
  5:    5000   5001   5002   5003 
  6:    6000   6001   6002   6003 
  7:    7000   7001   7002   7003 

