[Libre-soc-isa] [Bug 1047] SVP64 LD/ST Data-Dependent Fail-First providing linked-list walking

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=1047

--- Comment #5 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---

>     sv.ld/ff=RC1 *1, 8(*0)
> 
> the use of RT=RA+1 creates the dependency-chain.

... but relies on ldst-immediate.  if the data structure is large
enough LDST-indexed has to be used but it is EXTRA2.  a solution
is being discussed in bug #1080 to make room for 2 extra bits that
can be added to RT and RA to make them EXTRA3.

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