File: fft2x.txt

Data from July, 10th, and Sep., 5th, 1990: 
------------------------------------------ 
                         320C25-40     320C25-50
                         320E25          ---
                         320C26          ---
                         ------------ -------------  pgm-
FFT  DIV DEVICE   cycles time @ 100ns  time @ 80 ns  words twiddles VERSION REM
---- --- ------- ------- ------------ -------------  ----- -------- ------- ---


  16  2  E/C25/6     447      44.7 us      35.76 us   267      11   MP/MC

  16  4  E/C25/6     438      43.8 us      35.04 us   401      11   MP/MC

------------------------------------------------------------------------------


  32  2  E/C25/6   1,193     119.3 us      95.44 us   282      34   MP/MC

  32  4  E/C25/6   1,160     116.0 us      92.80 us   524      34   MP/MC

------------------------------------------------------------------------------


  64  2  E/C25/6   2,971     297.1 us     237.68 us   294      81   MP/MC

  64  4  E/C25/6   2,881     288.1 us     230.48 us   536      81   MP/MC


------------------------------------------------------------------------------

 128  2  E/C25/6   7,117     711.7 us     569.20 us   306     176   MP/MC

 128  4  E/C25/6   6,887     688.7 us     550.96 us   548     176   MP/MC

------------------------------------------------------------------------------


 256  2  E/C25    19,028   1,902.8 us   1,522.24 us   321     366   MP
 256  2  E/C25    19,028   1,902.8 us   1,522.24 us   321     366   MC

 256  2    C26    16,587   1,658.7 us       ------    321     366   MP

 256  4  E/C25     18476    1847.6 us    1478.08 us   564     366   MP
 256  4  E/C25     18476    1847.6 us    1478.08 us   564     366   MC

 256  4    C26     16035    1603.5 us       ------    564     366   MP


                         320C25-40     320C25-50
                         320E25          ---
                         320C26          ---
                         ------------ -------------  pgm-
FFT  DIV DEVICE   cycles time @ 100ns  time @ 80 ns  words twiddles VERSION REM
---- --- ------- ------- ------------ -------------  ----- -------- ------- ---

 512  2  E/C25    47,174   4,717.4 us   3,773.92 us   356     793   MC       a
 512  2  E/C25    47,686   4,768.6 us   3,814.88 us   356     793   MP       a
 512  2    C26    41,198   4,119.8 us       ------    356     793   MP       a

 512  4  E/C25    45,878   4,587.8 us   3,670.24 us   605     793   MC       a
 512  4  E/C25    46,390   4,639.0 us   3,711.20 us   605     793   MP       a
 512  4    C26    39,902   3,990.2 us       ------    605     793   MP       a

------------------------------------------------------------------------------

 512  2  E/C25    52,862   5,285.2 us   4,228.96 us   339     793   MC       b
 512  2  E/C25    61,054   6,105.4 us   5,124.32 us   339     793   MP       b
 512  2    C26    38,921   3,892.1 us       ------    339     793   MP       b

 512  4  E/C25    51,566   5,156.6 us   4,125.28 us   581     793   MC       b
 512  4  E/C25    59,758   5,975.8 us   4,780.64 us   581     793   MP       b
 512  4    C26    37,625   3,762.5 us       ------    581     793   MP       b


------------------------------------------------------------------------------

1024  2  E/C25   109,467  10,946.7 us   8,757.36 us   425    1516   MC
1024  2  E/C25   112,539  11,253.9 us   9,003.12 us   425    1516   MP
1024  2    C26   107,397  10,739.7 us       ------    425    1516   MP


1024  4  E/C25   106,491  10,649.1 us   8,519.28 us   667    1516   MC
1024  4  E/C25   109,563  10,956.3 us   8,765.04 us   667    1516   MP
1024  4    C26   104,421  10,442.1 us       ------    667    1516   MP


remarks:
--------
a) c25 version of the 512 point fft            : d:\c2cx0512.c25
b) c26 optmized version of the 512 point fft   : d:\c2cx0512.c26

'div' is an optimisation factor which can can be defined from the user
      prior to assembling:
      div=2 stands for short programs but longer execution times!
      div=2 stands for longer programs but shorter execution times!
      see file 'divid.asm' for details!
mp-microprocessor
mc-microcomputer