This evolved to a specification known as the POWER ISA. In 2019 IBM made the POWER ISA [[!wikipedia Open_source]], to be looked after by the existing [[!wikipedia OpenPOWER_Foundation]]. Here is a longer history of [[!wikipedia IBM_POWER_microprocessors]]. These IBM proprietary processors
happen to implement what is now known as the POWER ISA. The names
POWER8, POWER9, POWER10 etc. are product designations equivalent to Intel
-i5, i7, i9 etc. and are frequently conflated with versions of the POWER ISA (v2.08, v3.0, v3.1).
+i5, i7, i9 etc. and are frequently conflated with versions of the POWER ISA (v2.07, v3.0c, v3.1b).
Libre-SOC is basing its [[Simple-V Vectorisation|sv]] CPU extensions on POWER ISA, because it wants to be able to specify a machine that can be completely trusted, and because POWER, thanks to IBM's involvement,
is designed for high performance.