; STEP · linear · d+(scale*add)>>8 · live resolve onto BGF · no rebound
; LINEAR BGS->BGF->SDF · atoms EZZIE PHI THERMO on BGF · free rides · no duo
        mov     eax, esi
        imul    eax, edx
        sar     eax, 8
        add     eax, edi
        or      eax, 1
        ret