Sergey Sharybin 4cd10ddfdb Fix naive 4x4 matrix multiplication C++ implementation
Is not visible on any of the officially platforms, as everywhere
SSE2 is available (on Apple Silicon via sse2neon).

Only got noticed by some intermittent issue during development
which made BLI_HAVE_SSE2 unaccessible.

Seems that transpose was done a bit wrong. Not sure if worth trying
to fold the equation into C++ types, as that requires extra memory
transfers for transpose. Opted for a more naive folding, which
avoids extra copies.

Added a regression test for it, verified against numpy, the BLI
SSE2 implementation.
2023-07-03 19:18:28 +02:00
2023-07-03 15:09:20 +02:00
2023-07-03 16:34:30 +02:00
2023-07-03 19:18:28 +02:00

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