[For Ayaka, should not be merged] Pedro's matrix multiplication algorithms #2419
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This PR is for Ayaka to review and should not be merged!
I added two algorithms for matrix multiplication, one that is specific to 2x2 matrices and uses a lot of parallelism, taking 14 cycles, and another one that implements a standard matrix multiplication algorithm for matrices of any size using while loops, taking over 100 cycles. I also added test cases for them using Runt, which can be run with
runt -i matrixmult
from the repository root.