mstembera d862ba4069 AVX512, AVX2 and SSSE3 speedups ...

Improves throughput by summing 2 intermediate dot products using 16 bit addition before upconverting to 32 bit.

Potential saturation is detected and the code-path is avoided in this case.
The saturation can't happen with the current nets,
but nets can be constructed that trigger this check.

STC https://tests.stockfishchess.org/tests/view/5fd40a861ac1691201888479
LLR: 2.94 (-2.94,2.94) {-0.25,1.25}
Total: 25544 W: 2451 L: 2296 D: 20797
Ptnml(0-2): 92, 1761, 8925, 1888, 106

about 5% speedup

closes https://github.com/official-stockfish/Stockfish/pull/3261

No functional change

2020-12-14 07:46:15 +01:00

..

affine_transform.h

AVX512, AVX2 and SSSE3 speedups

2020-12-14 07:46:15 +01:00

clipped_relu.h

Manually align arrays on the stack

2020-11-04 19:52:42 +01:00

input_slice.h

Add NNUE evaluation

2020-08-06 16:37:45 +02:00