How tightly coupled is uArch/implementation to ISA on modern OoO CPUs?

By: anonymous2 (anonymous2.delete@this.example.com), November 29, 2018 11:50 am
Room: Moderated Discussions
This is probably hard to answer...

If Intel/AMD wanted to release a (say) AArch64 CPU, could they take existing IP and only modify parts of it to make this happen?

I ask because at a high-level if you ignore the ISA, modern CPUs are converging on what look like quite similar internal details.

Do ISA details such as how you use SIMD instructions, memory model, coherency, etc. mean that it would require almost all of the IP to be greatly changed?
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How tightly coupled is uArch/implementation to ISA on modern OoO CPUs?anonymous22018/11/29 11:50 AM
  How tightly coupled is uArch/implementation to ISA on modern OoO CPUs?juanrga2018/11/29 12:04 PM
    How tightly coupled is uArch/implementation to ISA on modern OoO CPUs?Joseph2018/11/30 08:50 AM
      How tightly coupled is uArch/implementation to ISA on modern OoO CPUs?rwessel2018/11/30 10:17 AM
  How tightly coupled is uArch/implementation to ISA on modern OoO CPUs?anon2018/11/29 02:24 PM
    How tightly coupled is uArch/implementation to ISA on modern OoO CPUs?anon2018/11/29 02:52 PM
      How tightly coupled is uArch/implementation to ISA on modern OoO CPUs?dmcq2018/11/29 05:05 PM
        How tightly coupled is uArch/implementation to ISA on modern OoO CPUs?anon2018/11/30 01:25 AM
  How tightly coupled is uArch/implementation to ISA on modern OoO CPUs?David Kanter2018/12/01 05:44 AM
    How tightly coupled is uArch/implementation to ISA on modern OoO CPUs?Michael S2018/12/01 09:24 AM
      How tightly coupled is uArch/implementation to ISA on modern OoO CPUs?A None2018/12/04 04:53 AM
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