[PATCH] D25722: Improved cost model for FDIV and FSQRT
Simon Pilgrim via llvm-commits
llvm-commits at lists.llvm.org
Tue Oct 25 11:03:52 PDT 2016
RKSimon added a comment.
In https://reviews.llvm.org/D25722#578664, @mkuper wrote:
> I'd really like to understand the discrepancy between Agner's numbers and the IACA numbers - especially since IACA does give the expected number for the latency.
> Andrew, any chance you could ping the IACA people at Intel and ask them about this?
IACA doesn't have that great support these days - the website says development has been suspended, although they have announced they will do a BDW/SKL bugfix release at some point. Similar comments about dodgy costs don't seem to be answered.
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