Fix issue 18553 - Allow mov reg64,crn and mov crn,reg64

[LemonBoy]

Also add support for reading/writing the CR8 register on x64.

[dlang-bot]

Thanks for your pull request and interest in making D better, @LemonBoy! We are looking forward to reviewing it, and you should be hearing from a maintainer soon.
Please verify that your PR follows this checklist:

• My PR is fully covered with tests (you can see the annotated coverage diff directly on GitHub with CodeCov's browser extension
• My PR is as minimal as possible (smaller, focused PRs are easier to review than big ones)
• I have provided a detailed rationale explaining my changes
• New or modified functions have Ddoc comments (with Params: and Returns:)

Please see CONTRIBUTING.md for more information.

---

If you have addressed all reviews or aren't sure how to proceed, don't hesitate to ping us with a simple comment.

Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	18553	normal	Inline assembler: CR2, CR3 control registers not available in 64-bit code

[ghost]

How about RIP ? (https://issues.dlang.org/show_bug.cgi?id=17617)

[JinShil]

This is one of those PRs for which @WalterBright is uniquely qualified to review. Assigning to him.

[WalterBright]

When creating a PR to fix a bugzilla issue, please post a link to the PR in the issue. This is so that someone browsing bug reports will know if and where a PR for it is.

[WalterBright]

Please add to test/runnable/iasm64.d instead, as those include checks that the correct opcodes are emitted. Just seeing if it compiles is insufficient. You can see these tests for these instructions in 32 bit mode in test/runnable/iasm.d.

[WalterBright]

Thanks! You can delete this file now :-)

[JinShil]

Closing and reopening to wake up Semaphore CI.