Pith Number

pith:UAP4XNP5

pith:2026:UAP4XNP5WN5SCOTLVXG4H53XLK

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FlowPlace: Flow Matching for Chip Placement

Chao Qian, Chengrui Gao, Chenjian Ding, Ke Xue, Mingxuan Yuan, Peng Xie, Ruo-Tong Chen, Siyuan Xu, Yunqi Shi

FlowPlace applies flow matching to chip placement to deliver overlap-free layouts with superior PPA metrics and 10-50 times faster sampling than diffusion models.

arxiv:2604.23658 v2 · 2026-04-26 · cs.AR · cs.AI · cs.LG

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\usepackage{pith}
\pithnumber{UAP4XNP5WN5SCOTLVXG4H53XLK}

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Record completeness

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2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

Experiments on OpenROAD and ICCAD 2015 benchmarks show FlowPlace achieves better PPA metrics, 10-50× faster sampling efficiency, and zero overlaps.

C2weakest assumption

That mask-guided synthetic data generation combined with hard constraint sampling will produce valid, high-quality placements that generalize from the tested benchmarks to real industrial chip designs without introducing new failure modes.

C3one line summary

FlowPlace uses flow matching with mask-guided data and hard constraints to generate faster, overlap-free chip placements with better PPA metrics than diffusion models.

Receipt and verification

First computed	2026-06-02T03:04:41.527847Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a01fcbb5fdb37b213a6badcdc3f7775aaf0a94e0b2e614809c04d2917fbeddda

Aliases

arxiv: 2604.23658 · arxiv_version: 2604.23658v2 · doi: 10.48550/arxiv.2604.23658 · pith_short_12: UAP4XNP5WN5S · pith_short_16: UAP4XNP5WN5SCOTL · pith_short_8: UAP4XNP5

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/UAP4XNP5WN5SCOTLVXG4H53XLK \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: a01fcbb5fdb37b213a6badcdc3f7775aaf0a94e0b2e614809c04d2917fbeddda

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7efe8e40cad1e11e0620e801f22b107636e56bd4ee21854ff8a926dac451ac4",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AR",
    "submitted_at": "2026-04-26T11:25:17Z",
    "title_canon_sha256": "fef849e33146f4cef892a06f531c6cc1611e1d30717f2d314d98251ffe43b597"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.23658",
    "kind": "arxiv",
    "version": 2
  }
}