[Libre-soc-dev] 3D MESA Driver

[Luke Kenneth Casson Leighton]

On Monday, August 10, 2020, Lauri Kasanen <cand at gmx.com> wrote:

> On Mon, 10 Aug 2020 09:17:06 +0300
> Lauri Kasanen <cand at gmx.com> wrote:
>
> > And it also brings up the reverse operation, a gather, where source is
> > looped but destination is not.
> > "add this range of source regs to this one dst reg"
>
> A further thought, this clearly needs a separate elwidth for src and
> dst. Gathering 8-bit regs may need 16-, 32-, or 64-bit dst reg.


indeed.  funny then that VBLOCK can allow that, eh? :)  src reg is tagged
with 1 elwidth, dest reg with another.

SVPrefix P48 does not because there simply is not enough space in the 11
bits prefix to do so.  however P64 which is 11+16 bits might.

have to check the notes.  they are on the wiki.

l.




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