Adds tools/neural_sim/, a NumPy-based reference implementation of the
FPGA-Neural V2 numeric model (INT8 in/weight, 32-bit wraparound
accumulation, ReLU+saturate out), derived directly from
hardware/v2/rtl/neural_processor.v (not assumed) and reusing
tools/validation/mac_oracle.py's own pre-existing, hand-verified
two's-complement primitives rather than duplicating them.
Provides: neuron/layer/network models, a logical memory model of the
real V2 SDRAM map (weights/activations/results), deterministic
test-vector generators (simple/signed/extremes/zero/random/D-Stress
256x128) with JSON golden-vector export, an FPGA-vs-Python bit-exact
comparison utility, four example networks, a CLI
(`python -m tools.neural_sim ...`), and a 96-test pytest suite (all
passing) covering signed-arithmetic edge cases (including a direct
32-bit wraparound proof), scalar-vs-vectorized neuron cross-checks,
layer/memory/vector/comparison tests.
This is a golden functional reference (bit-exact numeric result),
explicitly NOT a cycle-accurate FPGA simulator -- see
tools/neural_sim/README.md for the full scope statement.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013xXuuRUWZScuo1DeYJxs3v
micheleandClaude Sonnet 5
9b5d1055b8