[flang-commits] [PATCH] D128395: [flang] Make SQRT folding exact

[Peter Klausler via Phabricator via flang-commits]

klausler created this revision.
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Replace the latter half of the SQRT() folding algorithm with code that
calculates an exact root with extra rounding bits, and then lets the
usual normalization and rounding code do the right thing.  Extend
tests to catch regressions.


https://reviews.llvm.org/D128395

Files:
  flang/lib/Evaluate/real.cpp
  flang/test/Evaluate/folding28.f90
  flang/unittests/Evaluate/real.cpp

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