commit | 2b4156e7ce2a4136637cc7b3101ea615c6a0ff6b | [log] [tgz] |
---|---|---|
author | Slava Zakharin <szakharin@nvidia.com> | Tue Feb 27 15:59:25 2024 -0800 |
committer | Copybara-Service <copybara-worker@google.com> | Tue Feb 27 16:05:50 2024 -0800 |
tree | 832169750564573690b4c29404aa70dfd51eb995 | |
parent | c76c94506ae9fb34814005e3f067004f4b88808f [diff] |
[flang][runtime] Support SUM/PRODUCT/DOT_PRODUCT reductions for REAL(16). (#83169) The reductions implementations rely on trivial operations that are supported by the build compiler runtime, so they can be enabled whenever the build compiler provides 128-bit float support. std::conj used by DOT_PRODUCT is a template implementation in most environments, so it should not introduce a dependency on any 128-bit float support library. I am not goind to test it in all the build environments before merging. If it fails for someone, I will deal with it. GitOrigin-RevId: d699d9d609a24d80809df15efe47ac539da90e93
Flang is a ground-up implementation of a Fortran front end written in modern C++. It started off as the f18 project (https://github.com/flang-compiler/f18) with an aim to replace the previous flang project (https://github.com/flang-compiler/flang) and address its various deficiencies. F18 was subsequently accepted into the LLVM project and rechristened as Flang.
Please note that flang is not ready yet for production usage.
Read more about flang in the docs directory. Start with the compiler overview.
To better understand Fortran as a language and the specific grammar accepted by flang, read Fortran For C Programmers and flang's specifications of the Fortran grammar and the OpenMP grammar.
Treatment of language extensions is covered in this document.
To understand the compilers handling of intrinsics, see the discussion of intrinsics.
To understand how a flang program communicates with libraries at runtime, see the discussion of runtime descriptors.
If you're interested in contributing to the compiler, read the style guide and also review how flang uses modern C++ features.
If you are interested in writing new documentation, follow LLVM's Markdown style guide.
Consult the Getting Started with Flang for information on building and running flang.