[llvm] [PowerPC] Add a set of extended mnemonics that are missing from Power 10. (PR #73003)

[Stefan Pintilie via llvm-commits]

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@@ -725,6 +725,38 @@ class XForm_24_sync<bits<6> opcode, bits<10> xo, dag OOL, dag IOL,
   let Inst{31}    = 0;
 }
 
+class XForm_24_P10wait<bits<6> opcode, bits<10> xo, dag OOL, dag IOL,
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stefanp-ibm wrote:

So, the original wait instruction was called `XForm_24_sync` and it was used both for `sync` and for `wait`. Now that the wait instruction has changed I added the `P10wait` so that it looks related to the other instruction.

However, I'm not attached to this name so I will change it.

https://github.com/llvm/llvm-project/pull/73003