cah
ab9ef9ca30
Add gen_verilator_vectors.py to convert test_vectors.json into hex files for $readmemh, and tb_ldpc_vectors.sv to drive 20 test vectors through the RTL decoder and verify bit-exact matching against the Python model. All 11 converged vectors pass with exact decoded word, convergence flag, and zero syndrome weight. All 9 non-converged vectors match the Python model's decoded word, iteration count, and syndrome weight exactly. Three RTL bugs fixed in ldpc_decoder_core.sv during testing: - Magnitude overflow: -32 (6'b100000) negation overflowed 5-bit field to 0; now clamped to max magnitude 31 - Converged flag persistence: moved clearing from IDLE to INIT so host can read results after decode completes - msg_cn2vn zeroing: bypass stale array reads on first iteration (iter_cnt==0) to avoid Verilator scheduling issues with large 3D array initialization Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
81 lines
720 B
Plaintext
81 lines
720 B
Plaintext
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