: y ( n seq -- y )
[ nth-unsafe 31 mask-bit ]
- [ [ 1+ ] [ nth-unsafe ] bi* 31 bits ] 2bi bitor ; inline
+ [ [ 1 + ] [ nth-unsafe ] bi* 31 bits ] 2bi bitor ; inline
: mt[k] ( offset n seq -- )
[
[
seq>>
[ [ n m - ] dip '[ [ m ] dip _ mt[k] ] each ]
- [ [ m 1- ] dip '[ [ m n - ] [ n m - + ] bi* _ mt[k] ] each ]
+ [ [ m 1 - ] dip '[ [ m n - ] [ n m - + ] bi* _ mt[k] ] each ]
bi
] [ 0 >>i drop ] bi ; inline
: init-mt-formula ( i seq -- f(seq[i]) )
- dupd nth dup -30 shift bitxor 1812433253 * + 1+ 32 bits ; inline
+ dupd nth dup -30 shift bitxor 1812433253 * + 1 + 32 bits ; inline
: init-mt-rest ( seq -- )
- n 1- swap '[
- _ [ init-mt-formula ] [ [ 1+ ] dip set-nth ] 2bi
+ n 1 - swap '[
+ _ [ init-mt-formula ] [ [ 1 + ] dip set-nth ] 2bi
] each ; inline
: init-mt-seq ( seed -- seq )
M: mersenne-twister random-32* ( mt -- r )
[ next-index ]
[ seq>> nth-unsafe mt-temper ]
- [ [ 1+ ] change-i drop ] tri ;
-
-USE: init
+ [ [ 1 + ] change-i drop ] tri ;
[
[ 32 random-bits ] with-system-random