[Libre-soc-dev] v3.1B prefix

[Lauri Kasanen]

On Mon, 07 Dec 2020 04:52:45 -0300
Alexandre Oliva <oliva at gnu.org> wrote:

> Even with all these opcodes put in, the compression rate for gcc's text
> segment was less than 3%.  It's not looking incredibly compelling :-(

Given this,

Jacob Lifshay <programmerjake at gmail.com> wrote:
> Luke, Cole, and I had a phone call to explain simple-v prefix to cole as
> well as resolve the disagreements:
>
> we decided that using a bit in the page tables may not be the best idea due
> to needing to modify all of llvm, gcc, the elf spec, the dynamic linker,
> binutils, etc. so we're most likely falling back to a mode switch bit in a
> SPR.

and since we already need to modify all of llvm, gcc, and binutils, it
strikes me as odd to weigh ld.so+elf spec as heavier than the
previously mentioned OpenPower member resistance.

- Lauri