RFR: 8375536: PPC64: Implement special MachNodes for floating point CMove [v6]

[Richard Reingruber]

On Fri, 30 Jan 2026 14:04:32 GMT, David Briemann <dbriemann at openjdk.org> wrote:

>> Adds the following mach nodes:
>> match(Set dst (CMoveF (Binary cop (CmpF op1 op2)) (Binary src1 src2)));
>> match(Set dst (CMoveD (Binary cop (CmpD op1 op2)) (Binary src1 src2)));
>> match(Set dst (CMoveF (Binary cop (CmpD op1 op2)) (Binary src1 src2)));
>> match(Set dst (CMoveD (Binary cop (CmpF op1 op2)) (Binary src1 src2)));
>
> David Briemann has updated the pull request incrementally with one additional commit since the last revision:
> 
>   add helpful comments

Marked as reviewed by rrich (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/29281#pullrequestreview-3728832582