[PATCH] D41348: [ARM] Lower unsigned saturation to USAT

Mon Dec 18 04:49:13 PST 2017

thebolt created this revision.
thebolt added reviewers: t.p.northover, pbarrio.
Herald added subscribers: kristof.beyls, javed.absar, aemerson.

Implement lower of unsigned saturation on an interval [0, k] where k + 1 is a power of two using USAT instruction in a similar way to how [~k, k] is lowered using SSAT on ARM models that supports it.

https://reviews.llvm.org/D41348

Files:
  lib/Target/ARM/ARMISelLowering.cpp
  lib/Target/ARM/ARMISelLowering.h
  lib/Target/ARM/ARMInstrInfo.td
  lib/Target/ARM/ARMInstrThumb2.td
  test/CodeGen/ARM/usat.ll

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