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Update of cost model for z17 [No change to default policy]#3396

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AlexandreEichenberger wants to merge 1 commit intoonnx:mainfrom
AlexandreEichenberger:missing-model-z17-v2
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Update of cost model for z17 [No change to default policy]#3396
AlexandreEichenberger wants to merge 1 commit intoonnx:mainfrom
AlexandreEichenberger:missing-model-z17-v2

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@AlexandreEichenberger AlexandreEichenberger commented Feb 13, 2026

Revised version from #3383 which updates the cost model for some missing z17 operations, tuned the heuristics to be more inline with LLM-ish models, and fix a compiler warning.

Part of the changes are also enforcing the placement decision when lowering ONNX to ZHigh... as currently some "CPU" placed operations where still moved to NNPA.

Still believe we should change the default placement heuristics, can delay/discuss this in the original PR

Signed-off-by: Alexandre Eichenberger <alexe@us.ibm.com>
@AlexandreEichenberger AlexandreEichenberger changed the title Update of cost model for z17 Update of cost model for z17 [No change to default policy] Feb 13, 2026
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