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License: MIT License
dot product (c module)
License: MIT License
see Washington-University/workbench@7335c69 for fix.
See Washington-University/workbench#34 (comment)
The user was providing added compiler options to try to automatically vectorize things (-O3 -DNDEBUG -ftree-vectorize -march=core-avx2 -mavx2
), but when these were passed into the dot library, it caused the function names of the dot_avx.c functions to never be compiled as sdot_avx
, etc. I am guessing that -march=core-avx2
may imply -mfma
, and therefore it just made two copies of sdot_avxfma
, etc.
If this is the reason, it would probably be more robust to use a define like DOT_USE_FMA
for the purpose of changing the function name and tweaking the implementation, instead of the __FMA__
that can unintentionally be triggered by a user playing with standard project-wide compiler flags.
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