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[AIE] Add FP64 support to G_FCMP legalizer (issue #431) #439

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@jseaton jseaton commented Apr 17, 2025

Adds support for comparing doubles, via intrinsics like __ledf2 in comparedf2.c.
This is basically identical to the float support, as are tests (G_MERGE_VALUES is a bit painful idk if there's a better way).

Did bonus sanity checks comparing random doubles on AIE2 hardware.

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