[PATCH] D124357: [AArch64] Cost modelling for fptoi_sat

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: samtebbs, fhahn, jaykang10, momchil.velikov, SjoerdMeijer.
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This builds on top of the target-independent cost model added in D124269 <https://reviews.llvm.org/D124269> to add aarch64 specific costs for fptoui_sat and fptosi_sat intrinsics. For many common types they will be legal instructions as the AArch64 instructions will saturate naturally. For unsupported pairs of integer and floating point types, an additional min/max clamp is needed.


https://reviews.llvm.org/D124357

Files:
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
  llvm/test/Analysis/CostModel/AArch64/fptoi_sat.ll

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