Update port library's processor detection APIs and enums

[harryyu1994]

This change involves updating the omrsysinfo_get_x86_description() API and
a few enums.

Issue: #4339

Signed-off-by: Harry Yu harryyu1994@gmail.com

[harryyu1994]

The purpose of this change is to move x86's processor feature detection out of codegen and into the CPU class. We also would like the CPU class to use the port library for feature detection. I referenced this file(https://github.com/eclipse/omr/blob/master/compiler/x/runtime/X86Runtime.hpp) for the change.

There are 3 steps to this whole thing and this change is step 1:

1. Update the x86 processor feature detection port library implementation
2. Add the x86 processor feature queries to the CPU class

• the queries are currently in codegen
• we would like the queries to use the port library implementation instead for processor feature detection

3. Switch the usage of queries to the new implementation in the CPU class

[harryyu1994]

@0xdaryl @andrewcraik I've seen you guys review related changes before, could you guys take a look?

[harryyu1994]

@rwy0717 @0xdaryl @youngar @mstoodle @charliegracie Could anyone help review this one? thanks!

[harryyu1994]

I introduced another small change in "port/unix/omrsysinfo.c" that fixes a few Macro typos.

[harryyu1994]

Attaching the list of references used for this change, I figured this may help the reviewers:

• https://github.com/eclipse/omr/blob/master/compiler/x/runtime/X86Runtime.hpp#L27-L110
• https://github.com/eclipse/omr/blob/master/compiler/x/codegen/OMRCodeGenerator.cpp#L112-L201
• https://github.com/eclipse/omr/blob/master/compiler/env/Processors.hpp#L63-L164
• https://github.com/eclipse/omr/blob/master/compiler/env/ProcessorInfo.hpp#L189-L212

OpenJ9's Processor Detection on x86 is all-over the place, there are 3 different variations in the code base with only one being up-to-date. OpenJ9 x86 codegen's implementation seems to be the most up-to-date one and is what I referenced(mostly).
This change unifies everything into one location.

[rwy7]

@genie-omr build all

[harryyu1994]

13:58:48  /home/jenkins/workspace/PullRequest-linux_390-64/port/common/omrsysinfo_helpers.c:41:19: fatal error: cpuid.h: No such file or directory
13:58:48   #include <cpuid.h>
13:58:48                     ^
13:58:48  compilation terminated.

Looking into it..

Should be disabled on non-x86 platforms

[harryyu1994]

@rwy0717 Could we re-launch the builds/tests?

[rwy7]

@genie-omr build all

[harryyu1994]

@rwy0717 Thanks for the review, could this be merged now? Also, I'm wondering if you could review this short PR too(#4838). That one is related to port library cpu detection as well.