[libre-riscv-dev] daily kan-ban update 08jun2020
colepoirier at gmail.com
Mon Jun 8 23:29:17 BST 2020
> On Jun 8, 2020, at 3:13 PM, Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote:
> yyeah. last time i explained it to someone (in detail) it was to
> Alain. it took six hours.
> the summary: rather than have dozens of instructions ADD x1, x10 ADD
> x2, x11 ADD x3, x12, instead you deploy SimpleV - with *one*
> instruction - telling it (by setting VL) exactly how many registers,
> in sequence, you would like that *ONE* instruction to push into the
> instruction queue.
> that's basically all there is to it. it should be pretty obvious
> therefore that it is effectively a very simple version of an
> instruction "compression algorithm".
> in effect, Simple-V is a hardware-level for-loop. if you have heard
> of Zero-Overhead Loops, it is a bit like that. except, whilst ZOHLs
> loop around a *group* of instructions, Simple-V gives the option to
> apply the for-loop to *ANY* instruction, and does so *on* that
> instruction *before* moving on to the next one.
> it's like a Sub- Program Counter, in effect
Aha that makes sense! I’ll integrate this into the rest of the insights from the list earlier today.
>> Can I ask you to see if you're able to answer some of these questions
>> today, if your illness permits?
> it's fine, now: i took... i won't go into the medical details, there's
> a procedure i follow which clears out toxins and it was effective.
> also, a drink made from large quantities of ginger root, cardamons,
> black pepper and chilis, caused me to cough and splutter and generally
> hawk and spit profusely (as might be expected), and surpriise! i'm
> feeling much better.
I’m glad to hear you’re feeling better! However you’ve figured out how to make it happen. Thanks Luke, I’ll hopefully have something for you in about an hour.
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