b-bits ( imm -- bits )

Vocabulary

cpu.riscv.64.assembler

Inputs

imm

an object

Outputs

bits

an object

Definition

USING: kernel math math.bitwise ;

IN: cpu.riscv.64.assembler

:: b-bits ( imm -- bits )
    imm 13 signed-immediate :> n imm 1 bitand 0 =
    [ ] [ imm 13 invalid-riscv-immediate ] if n -12 shift
    31 shift n -5 shift 6 bits 25 shift bitor n -1 shift 4 bits
    8 shift bitor n -11 shift 1 bits 7 shift bitor ;