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feat(hw/rtl): implement full Top-K CAM search pipeline with serial result output

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- add TOPK_K, FIFO_DEPTH, RESULT_SERIAL parameters to cam_params
- add candidate_fifo: synchronous ready/valid FIFO for (row, score) candidates
- add topk_tracker: tracks top-K candidates with clear/ready handshake
- add result_serializer: serializes packed Top-K array into rank-ordered stream
- refactor match_engine_pipeline from 4-state to 8-state Top-K pipeline
- extend cam_top with serial Top-K interface (result_rank/row/score/last)
- add backward-compatible top1_index/top1_score aliases from rank-0 beat
- add comprehensive tests for all new modules
This commit is contained in:
SikongJueluo
2026-05-19 18:19:05 +08:00
parent 8bcad1f23f
commit e4cbb5e30d
21 changed files with 2152 additions and 124 deletions
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4
hw/syn/Makefile
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@@ -16,6 +16,8 @@ TOP ?= cam_top
NUM_ROWS ?= 4096
HASH_BITS ?= 512
LANES ?= 8
TOPK_K ?= 4
FIFO_DEPTH ?= 16
OUT_DIR ?= build
# ── TOP enforcement (only cam_top is supported) ───────────────────────────────
@@ -41,7 +43,7 @@ ARTIFACTS := $(HIER_JSON) $(FLAT_JSON) $(SYNTH_V) $(HIER_LOG) $(FLAT_LOG)
# ── Yosys command-line defines (always passed) ────────────────────────────────
# cam_params.svh uses `ifndef guards, so -D on the Yosys CLI overrides defaults.
# Use -D NAME=value syntax (Yosys 0.62); do NOT use -define.
YOSYS_DEFINES := -D NUM_ROWS=$(NUM_ROWS) -D HASH_BITS=$(HASH_BITS) -D LANES=$(LANES)
YOSYS_DEFINES := -D NUM_ROWS=$(NUM_ROWS) -D HASH_BITS=$(HASH_BITS) -D LANES=$(LANES) -D TOPK_K=$(TOPK_K) -D FIFO_DEPTH=$(FIFO_DEPTH)
# ── Targets ───────────────────────────────────────────────────────────────────
.PHONY: synth hier flat clean