3 ms·

ARM has been doing basically the same thing for decades now with all the different sub versions of ARMv7, 8, 9 etc.

• yjftsjthsd-h 5y ago
  Those are versions of the same(ish) ISA and are (usually?) backwards compatible. I'd mind less if MIPS-the-company made CPUs that were RISC-V with a MIPS-the-ISA compatibility mode, or otherwise actually had continuity; it's the apparent plan to throw away the ISA but keep the name that's jarring.
  • dragontamer 5y ago
    ARM Cortex M0+ looks nothing like ARM v8. ARM Cortex M0+ has more similarities with the ATTiny84 / Arduino chips than with cellphone-sized ARMs.
    • pajko 5y ago
      Cortex M0+ is ARMv6-M. ARMv8 has also an M variant, Cortex M33 is ARMv8-M mainline. ARMv6-M and ARMv8-M have quite a lot of things in common, as v8 is a superset of v6. Or did you mean ARMv8-A? Well, ARMv8-A and ARMv8-M are not compatible intentionally, as the the A variant is strictly 64-bit (some implementations support AArch32 though) and the support for thumb instruction set has been dropped.
  • GoblinSlayer 5y ago
    That's reasonable: RISC-V is mostly a cleaned up MIPS, so can definitely go as a MIPS family ISA.
    • pajko 5y ago
      MIPS is as cleaned up as needs to be. RISC-V removed important features and adds loads of bloats via extensions.