Add optimized crc32 for Power 8+ processors #857
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
added 3 commits
September 15, 2023 11:38
Optimized functions for Power will make use of GNU indirect functions, an extension to support different implementations of the same function, which can be selected during runtime. This will be used to provide optimized functions for different processor versions. Since this is a GNU extension, we placed the definition of the Z_IFUNC macro under `contrib/gcc`. This can be reused by other archs as well. Author: Matheus Castanho <[email protected]> Author: Rogerio Alves <[email protected]> Signed-off-by: Manjunath Matti <[email protected]>
This commit adds an optimized version for the crc32 function based on crc32-vpmsum from https://github.com/antonblanchard/crc32-vpmsum/ This is the C implementation created by Rogerio Alves <[email protected]> It makes use of vector instructions to speed up CRC32 algorithm. Author: Rogerio Alves <[email protected]> Signed-off-by: Manjunath Matti <[email protected]>
Clang 7 changed the behavior of vec_xxpermdi in order to match GCC's behavior. After this change, code that used to work on Clang 6 stopped to work on Clang >= 7. Tested on Clang 6, 7, 8 and 9. Reference: https://bugs.llvm.org/show_bug.cgi?id=38192 Signed-off-by: Tulio Magno Quites Machado Filho <[email protected]> Signed-off-by: Manjunath Matti <[email protected]>
|
@madler: Can you look this PR? |
This was referenced Jan 20, 2024
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This is a pull request to include all Power8 optimisations rebased to v1.3
Issue #847 and the reference PR's are #750 ( Power8 optimisations rebased to v1.2.13) and #478.