bit-range ( x high low -- y )
Factor handbook » The language » Numbers » Arithmetic » Bitwise arithmetic » Additional bitwise arithmetic

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Vocabulary
math.bitwise

Inputs

x	an integer
high	an integer
low	an integer

Outputs

y	an integer

Word description
Extract a range of bits from an integer, inclusive of each boundary.

USING: math.bitwise prettyprint ; 0b1100 3 2 bit-range .b
0b11

Definition

USING: combinators.short-circuit kernel math ;

IN: math.bitwise

: bit-range ( x high low -- y )
    2dup { [ nip 0 < ] [ < ] } 2|| [ bit-range-error ] when
    [ nip neg shift ] [ - 1 + ] 2bi bits ; inline