IN: crypto.barrett
: barrett-mu ( n size -- mu )
- #! Calculates Barrett's reduction parameter mu
- #! size = word size in bits (8, 16, 32, 64, ...)
+ ! Calculates Barrett's reduction parameter mu
+ ! size = word size in bits (8, 16, 32, 64, ...)
[ [ log2 1 + ] [ / 2 * ] bi* ]
[ 2^ rot ^ swap /i ] 2bi ;