; BGF CPU · native regs on BGF · knows samples
; LINEAR BGS->BGF->SDF · atoms EZZIE PHI THERMO on BGF · free rides · no duo
; eax field · r8 free SPV · no fold
        mov     r8d, edi
        xor     r8d, esi
        xor     r8d, edx
        or      r8d, 1
        mov     eax, edi
        sub     eax, esi
        or      eax, 1
        ret