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>
41 lines
1.2 KiB
Makefile
41 lines
1.2 KiB
Makefile
RTL_DIR = ../rtl
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RTL_FILES = $(RTL_DIR)/ldpc_decoder_top.sv \
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$(RTL_DIR)/ldpc_decoder_core.sv \
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$(RTL_DIR)/wishbone_interface.sv
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.PHONY: lint sim sim_vectors clean
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lint:
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verilator --lint-only -Wall \
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-Wno-WIDTHEXPAND -Wno-WIDTHTRUNC -Wno-CASEINCOMPLETE \
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-Wno-BLKSEQ -Wno-BLKLOOPINIT -Wno-UNUSEDSIGNAL -Wno-UNUSEDPARAM \
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--unroll-count 1024 \
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$(RTL_FILES) --top-module ldpc_decoder_top
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sim: obj_dir/Vtb_ldpc_decoder
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./obj_dir/Vtb_ldpc_decoder
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obj_dir/Vtb_ldpc_decoder: tb_ldpc_decoder.sv $(RTL_FILES)
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verilator --binary --timing --trace \
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-o Vtb_ldpc_decoder \
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-Wno-WIDTHEXPAND -Wno-WIDTHTRUNC -Wno-CASEINCOMPLETE \
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-Wno-BLKSEQ -Wno-BLKLOOPINIT -Wno-UNUSEDSIGNAL -Wno-UNUSEDPARAM \
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--unroll-count 1024 \
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tb_ldpc_decoder.sv $(RTL_FILES) \
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--top-module tb_ldpc_decoder
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sim_vectors: obj_dir/Vtb_ldpc_vectors
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./obj_dir/Vtb_ldpc_vectors
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obj_dir/Vtb_ldpc_vectors: tb_ldpc_vectors.sv $(RTL_FILES)
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verilator --binary --timing --trace \
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-o Vtb_ldpc_vectors \
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-Wno-WIDTHEXPAND -Wno-WIDTHTRUNC -Wno-CASEINCOMPLETE \
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-Wno-BLKSEQ -Wno-BLKLOOPINIT -Wno-UNUSEDSIGNAL -Wno-UNUSEDPARAM \
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--unroll-count 1024 \
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tb_ldpc_vectors.sv $(RTL_FILES) \
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--top-module tb_ldpc_vectors
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clean:
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rm -rf obj_dir *.vcd
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