I have a routine cpBCHL that compares the contents of BC and HL and returns the carry set appropriately:

; ---------------------------------------------------------------------- ; ♠BCHL ♣A ♡* Compare BC - HL and set "borrow" (carry): ; • BC ≥ HL ⇒ NCy (carry clear) ; • BC < HL ⇒ Cy (carry set) cpBCHL ld a,c ; LSB sub a,l ; affects carry ld a,b ; MSB sbc a,h ; use and affect carry ret 

And I have a very similar routine, that compares the two and returns the zero flag set based on whether they're equal or not:

; ---------------------------------------------------------------------- ; ♠BCHL ♣A ♡* Compare BC to HL and set Z flag (1=equal, 0=not equal) eqBCHL ld a,c ; LSB sub a,l ret NZ ld a,b ; MSB sbc a,h ret 

Is there some compact way to combine these two so I can have one routine that sets both Z and Cy appropriately?

I'd prefer 8080 code if possible, but I'm open to Z80 code if that can be significantly more efficient.

I'm more concerned about size than speed here.