    /* const vAA, #+BBBBbbbb */
    mov     r3, rINST, lsr #8           @ r3<- AA
    FETCH r0, 1                         @ r0<- bbbb (low)
    FETCH r1, 2                         @ r1<- BBBB (high)
    FETCH_ADVANCE_INST 3                @ advance rPC, load rINST
    orr     r0, r0, r1, lsl #16         @ r0<- BBBBbbbb
    GET_INST_OPCODE ip                  @ extract opcode from rINST
    SET_VREG r0, r3                     @ vAA<- r0
    GOTO_OPCODE ip                      @ jump to next instruction