When a new CPU like AMD is out, it is legal for INTEL to reverse engineer it to see how it works. They simply can't copy it etc.. This way it makes way for better products in the future by sharing knowledge. Copyright is a funny beast and you can't blanket an answer to everything because it may not apply all around.
You will be 100% by asking a legit question to a lawyer if you are really concerned but it will $$$$$.
take care |