2 Commits

Author	SHA1	Message	Date
SikongJueluo	f5daaa2667	refactor(cam): extract match engine into separate module and centralize parameters ... - Split cam_core into pure memory (cam_core.sv) and match engine (match_engine.sv) - Add cam_params.svh with centralized parameter definitions (NUM_ROWS, HASH_BITS, LANES, etc.) - Update cam_top.sv to use shared parameters and compose match_engine - Update Makefile to include new match_engine module and correct Verilator define syntax	2026-05-02 23:28:32 +08:00
SikongJueluo	f71bf06484	feat(hw): add XNOR-popcount CAM design with cocotb verification ... Implement a multi-lane Content Addressable Memory (CAM) that scores rows by XNOR popcount against a query hash and returns the top-1 match. RTL modules: - popcount: parallel group-based population count - argmax_update: iterative best-match tracking with tie-break - cam_core: parameterized scanning engine (NUM_ROWS/HASH_BITS/LANES) with optional SIM_NOISE and SIM_DEBUG ifdef guards - cam_top: thin wrapper exposing cam_core ports Verification: - Python reference model (ref_model.py) for score-level golden comparison - cocotb testbench (test_cam_basic.py) covering write/query/reset and external noise mask scenarios with score debug verification - Noise sweep script (sweep_noise.py) measuring top-1 stability under configurable bit-flip rates - Verilator-oriented Makefile with parameterizable compile options	2026-05-02 23:26:16 +08:00