[all-commits] [llvm/llvm-project] 1ef5e6: [flang] Make SQRT folding exact

[Peter Klausler via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1ef5e6de7605434cb6316847a46eb01c23c70715
      https://github.com/llvm/llvm-project/commit/1ef5e6de7605434cb6316847a46eb01c23c70715
  Author: Peter Klausler <pklausler at nvidia.com>
  Date:   2022-06-23 (Thu, 23 Jun 2022)

  Changed paths:
    M flang/lib/Evaluate/real.cpp
    M flang/test/Evaluate/folding28.f90
    M flang/unittests/Evaluate/real.cpp

  Log Message:
  -----------
  [flang] Make SQRT folding exact

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.

Differential Revision: https://reviews.llvm.org/D128395