popcount: Fix output width #251
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phsauter merged 2 commits intopulp-platform:v2-devfrom Apr 23, 2026
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This PR fixes the popcount output width calculation. The hamming weight of an input of width INPUT_WIDTH can range from 0 (all bits deasserted) to INPUT_WIDTH (all bits asserted), giving a total of INPUT_WIDTH + 1 values. The minimum number of bits required to represent these values is ceil(log2(INPUT_WIDTH+1)).
Some simulation waveforms generated using Vivado2024 are shown below:
Happy New Year!
diskouna