Summary

The two test cases TEST_CPPCONTRIB_SA_DECODE.D256_IVF1024_PQ16 and TEST_CPPCONTRIB_SA_DECODE.D256_IVF1024_PQ16 are failing in AIX due to an endianness issue.

These two test cases use COARSE BITS = 16 and use unit16_t data type which needs to be aligned correctly to big endian. This issue is similar to #3346 .

Platform

OS: AIX

Faiss version: Master branch

Installed from: compiled by yourself

Faiss compilation options: Standard cmake options

Reproduction instructions

Run ctest after build on any big endian machine.

I have fixed this issues by making changes in faiss/cppcontrib/sa_decode/Level2-inl.h. Kindly let me know what you think.