[libre-riscv-dev] LibreSOC - RISCV and POWER dual architecture feasibility

[Lauri Kasanen]

On Sun, 15 Mar 2020 12:43:45 -0700
Jacob Lifshay <programmerjake at gmail.com> wrote:

> Later (for Libre-SOC v2 or v3), it might be a good idea to add support for
> x86 and x86_64 user-mode since the patents for the base ISA will have
> expired by then. This would help give us an advantage since it would allow
> us to run legacy software.

486 and 586 patents had expired years ago, and we had Chinese 1 GHz
implementations of those (vortex86). Now they have 686 models, so I
take pentium pro patents are also up for use.

x86_64 should become free around 2022 by my estimation.

- Lauri