[Libre-soc-dev] remap status?
Luke Kenneth Casson Leighton
lkcl at lkcl.net
Fri May 28 15:19:14 BST 2021
sorry lauri replying with gmail basic HTML on a phone, it's totally broken.
offset multiplication 64(r2) is actually one of the LD/ST Modes,
for i in range(VL)
EA = GPR(RA) + i*offs
which should give exactly the effect you're looking for. REMAP is for
munging "i" in that loop rather than munging offs:
EA = .. remap(i) * offs
to be able to do strange things like
which would be Ydim=4, Xdim=2 with priority to incrementing Ydim first
and Xdim 2nd.
neither LDST offs-mul mode nor gather mode have been implemented yet,
they were planned to be done some time after elwidth.
however, clearly, you need them, so it's not a problem to prioritise them.
btw it just occurred to me, a really interesting idea, the mini kvm
program, we could actually capture illegal instruction traps and
emulate svp64 in c. hmmm.
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