(BFIZ) ( Rn lsb width -- Rn immr imms )

Vocabulary

cpu.arm.64.assembler.private

Inputs

Rn	an object
lsb	an object
width	an object

Outputs

Rn	an object
immr	an object
imms	an object

Definition

USING: kernel math math.bitwise math.order ;

IN: cpu.arm.64.assembler.private

: (BFIZ) ( Rn lsb width -- Rn immr imms )
    [ ?max-width ] dip 3dup spin [ 1 ] [ 2^ ] [ - ] tri*
    between? [ immediate-error ] unless
    [ neg ] [ bits ] [ 1 - ] tri* ;