[Libre-soc-bugs] [Bug 238] POWER Compressed Formal Standard writeup

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Sat Nov 21 11:32:14 GMT 2020


--- Comment #50 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---

Itanium failed because it was a VLIW microarchitecture.  you cannot deploy OoO
techiques on VLIW or i would hazard a guess that anyone trying would run away

On 11/21/20, Lauri Kasanen <cand at gmx.com> wrote:

> This reminded me that there is predecent in LLVM. Some folks used
> LLVM's optimizers on LZ-style compression. It's a hard, NP-class
> problem on how to get the minimum compressed size - should I use this
> dict entry but a worse one later, or maybe try another combination.

and, even getting it right you have the pressure of how much time it takes.

all that, whilst it is an issue, it is one that over time can be taken care of.
 unlike VLIW which is a known-failed path there are people working on and
solving this path.

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