From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
To: Libre-RISCV General Development <libre-riscv-dev@lists.libre-riscv.org>
Subject: Re: [libre-riscv-dev] morphing 6600 code to use power decoder
Date: Mon, 13 Apr 2020 19:27:41 +0100
Message-ID: <CAPweEDzjHTsG3mcAWeKxb4cThrCD3ZBgfk8nry2=qLWoA9vHvw@mail.gmail.com> (raw)
In-Reply-To: <3e3c538da863fba6572ac948469c763c@f-cpu.org>
On Mon, Apr 13, 2020 at 6:46 PM <whygee@f-cpu.org> wrote:
>
> On 2020-04-13 16:16, Luke Kenneth Casson Leighton wrote:
> > https://groups.google.com/forum/#!topic/comp.arch/qeMsE7UxvlI
> > https://libre-soc.org/3d_gpu/architecture/6600scoreboard/
> > https://www.youtube.com/watch?v=ohHbWRLDCfs
> >
> > this is quite a significant core change to the 6600 scoreboard engine,
> > so i'm soliciting outside help in reviewing it. ironically (and very
> > much to the point) i realised an error towards the end of the
> > description.
>
> I couldn't be sure to understand all the subtleties.
CompUnits are a forward-progress looped Finite-State-Machine. Issue,
Read, Write, Issue, Read, Write. that's now Issue, {Read1/2/3},
{Write1/2}, Issue {Read1/2/3}, {Write1/2} repeat repeat.
Dependency Matrices: Reads stop Writes, Writes stop Reads. now there
are multiple read-regs, any one of those multiple Read-Regs must stop
Writes, any one of those multiple Write-Regs must stop Reads.
> However remove the comment from "Tom"/Temar
> who is a click-harvesting bot on youtube.
done.
> Anyway : impressive work !
appreciated. now i have to implement it. and modify all the
dependent code that uses it. sigh. it'll be about a month's work.
l.
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Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-08 13:26 Luke Kenneth Casson Leighton
2020-04-09 0:47 ` whygee
2020-04-09 1:21 ` Luke Kenneth Casson Leighton
2020-04-10 15:01 ` Luke Kenneth Casson Leighton
2020-04-11 11:20 ` Luke Kenneth Casson Leighton
2020-04-12 12:32 ` Luke Kenneth Casson Leighton
2020-04-13 14:16 ` Luke Kenneth Casson Leighton
2020-04-13 17:46 ` whygee
2020-04-13 18:27 ` Luke Kenneth Casson Leighton [this message]
2020-04-14 19:12 ` Luke Kenneth Casson Leighton
2020-04-16 12:19 ` Luke Kenneth Casson Leighton
2020-04-16 15:41 ` Luke Kenneth Casson Leighton
2020-04-18 11:06 ` Luke Kenneth Casson Leighton
2020-04-23 17:16 ` Luke Kenneth Casson Leighton
2020-04-24 20:11 ` Luke Kenneth Casson Leighton
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