32 bit addition

[ice]

Hello..
i would like to increment a 32 bit variable with ticks from a quadrature encoder.

I understand that PBP whorks with 8 bit variables..

Following is a code snip for incrementing a 16bit variable

;Increments _enc_counter (16 bit value), sets Z on exit.

incfsz  _enc_counter,W      ; Add one to low byte
decf    _enc_counter+1,F    ; No carry (negates next step)
incf    _enc_counter+1,F    ; Add one to high byte
movwf   _enc_counter        ; Store updated low byte back.
iorwf   _enc_counter+1,W    ; Set Z flag

how would it be implemented for 32 bits?..
i also need to display the 32 bit values on an LCD..

Thank you