22 Apr
2024
22 Apr
'24
2:13 p.m.
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