mapleFU commented on issue #39227: URL: https://github.com/apache/arrow/issues/39227#issuecomment-1952413162
@pitrou Just curious that, seems implement unpack8 with pdep can get some optimizations. However, I searched in arrow project, seems that there're two usage of BMI2: 1. check ARROW_HAVE_BMI2 in `src/parquet/level_conversion_inc.h` function `ExtractBits` 2. check ARROW_HAVE_RUNTIME_BMI2 in `src/arrow/compute/util_avx2.cc` function `bits_to_indexes_imp_avx2` If I want a pdep, should I write a same impl like `src/parquet/level_conversion_inc.h` function `ExtractBits`? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
