[all-commits] [llvm/llvm-project] c78144: [libc][math] Improved performance of exp2f function.

[orex via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c78144e1c74b689504b240c0a511b8561212523f
      https://github.com/llvm/llvm-project/commit/c78144e1c74b689504b240c0a511b8561212523f
  Author: Kirill Okhotnikov <okir at google.com>
  Date:   2022-07-28 (Thu, 28 Jul 2022)

  Changed paths:
    M libc/docs/math.rst
    M libc/src/math/generic/CMakeLists.txt
    M libc/src/math/generic/common_constants.cpp
    M libc/src/math/generic/common_constants.h
    M libc/src/math/generic/exp2f.cpp

  Log Message:
  -----------
  [libc][math] Improved performance of exp2f function.

New exp2 function algorithm:
1) Improved performance: 8.176 vs 15.270 by core-math perf tool.
2) Improved accuracy. Only two special values left.
3) Lookup table size reduced twice.

Differential Revision: https://reviews.llvm.org/D129005