micheleandClaude Sonnet 5
20b0b1f4c0
mac_unit.v: exhaustive unit test (all 65536 (x,w) combinations at DATA_WIDTH=8, plus 486 boundary acc_in vectors) against an independent Python oracle (tools/validation/mac_oracle.py). 66022/66022 match, 0 reserves. mac8.v: first-ever dedicated unit test (previously only indirect coverage at whatever single PARALLEL neuron_parallel_tb.v happens to use). Verified at PARALLEL=2/8/32 with structural adversarial vectors (catches swapped/duplicated tree wiring), 300 random INT8 pairs per PARALLEL with realistic accumulating acc_in, and worst-case magnitude adversarial vectors. 939/939 match. Confirms BUG-002 (N_INPUTS=0 bypasses the N_INPUTS%PARALLEL elaboration guard) is real, on both simulation and real Yosys synthesis -- root cause: [DATA_WIDTH*N_INPUTS-1:0] becomes [-1:0] for N_INPUTS=0, which both tools treat as a genuine 2-bit undriven vector rather than collapsing to zero width. Includes a documented self-correction: the first verification attempt produced a false "hang" using an invalid one-shot late check of a single-cycle done pulse -- caught by reproducing the same false result on a known-good sanity config before trusting it. Full regression re-run clean after adding 3 new testbenches: 36/36 real tests pass. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_013xXuuRUWZScuo1DeYJxs3v
314 lines
7.6 KiB
Plaintext
314 lines
7.6 KiB
Plaintext
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