[libre-riscv-dev] [Bug 139] Add LD.X and ST.X? Strided

[bugzilla-daemon at libre-riscv.org]

http://bugs.libre-riscv.org/show_bug.cgi?id=139

--- Comment #29 from Jacob Lifshay <programmerjake at gmail.com> ---
(In reply to Luke Kenneth Casson Leighton from comment #27)
> rs2 subvl=1 makes sense, i was just looking at CORDIC and SLERP and they
> need the same trick.
> 
> An extra SUBVL just is not that simple.
> 
> It would be better to have swizzle2, swizzle3 and swizzle4 to truncate the
> subvector.

that's identical to adding a destsubvl field to the instruction, which is
mostly what I was suggesting. the existing subvl mechanisms would give
srcsubvl.

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