Well I have been studying psuedorandom sequences for Microchip microcontrollers based on seeds and so far the fastest I have found is thusly from mondo technology:
Code:
chop movf val1,w ;get the 1st
addwf val2,w ;add the 2nd
movwf val2 ;store the 2nd
addwf val3,w ;add the 3rd & store
movwf val3 ;back in 3rd
addwf val1 ;add back to 1st
swapf val1 ;swap nibbles
movf val1,w ;return one byte
ret
It looks to be 10 instruction cycles long. However, I would like to see some other methods as I have found that this particular algorithm tends to repeat numbers after a short while with only a 24-bit seed. Does anyone else know of some psuedorandom sequences (C, ASM, or Psuedocode please)?