bitroll ( x s w -- y )
Factor handbook » The language » Numbers » Arithmetic » Bitwise arithmetic » Additional bitwise arithmetic

Prev:	wrap ( m n -- m' )
Next:	bitroll-32 ( m s -- n )

Vocabulary
math.bitwise

Inputs

x	an integer
s	a shift integer
w	a wrap integer

Outputs

y	an integer

Word description
Roll n by s bits to the left, wrapping around after w bits.

Examples

USING: math.bitwise prettyprint ; 1 -1 32 bitroll .b
0b10000000000000000000000000000000

USING: math.bitwise prettyprint ; 0xffff0000 8 32 bitroll .h
0xff0000ff

See also
bitroll-32, bitroll-64

Definition

USING: kernel math ;

IN: math.bitwise

: bitroll ( x s w -- y )
    [ wrap ] keep [ shift-mod ] [ [ - ] keep shift-mod ] 3bi
    bitor ; inline