[cctalk] Re: Z80 vs other microprocessors of the time.

[Mike Katz via cctalk]

Compilers do that with what is called loop rotation optimization.

On 4/22/2024 3:59 PM, Chuck Guzis via cctalk wrote:

On 4/22/24 13:53, Paul Koning via cctalk wrote:

In COMPASS:

MORE    SA1     A1+B2           (B2 = 2)
        SA2     A2+B2
        BX6     X1
        LX7     X2
        SB3     B3-2
        SA6     A6+B2
        SA7     A7+B2
        PL      b3,MORE

My recollection is that putting the stores at the top of the loop and
the loads at the bottom managed to save a few cycles.  Of course, you
have to prime the loop...

--Chuck