[Libre-soc-dev] svp64

Cole Poirier colepoirier at gmail.com
Tue Dec 22 19:38:09 GMT 2020

On Tue, Dec 22, 2020 at 11:30 AM Luke Kenneth Casson Leighton
<lkcl at lkcl.net> wrote:
> they probably did, given the success it had in the PS3.
> however: look at the instruction count of VSX.  sonewhere around 700 i
> think.  this because it is SIMD-with-a-smidgen-of-Vector ops.
> [snip]
> this is the point of the abstraction prefixing in SV: don't create separate
> vector instructions, because you're only duplicating the scalar ISA in
> about 95% of cases.
> underneath, SV is a handful, like hanging on to a pissed-off bunch of
> howling wolves with their tails knotted together, but hey.

Indeed, great for programmers, the cognitive complexity has moved
entirely into the hardware domain.


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