{
  "version": "FI_LOCAL_WEBSITE_CURRENT_UPDATE_20261015_R1",
  "review_cutoff": "15 October 2026",
  "evidence_class": "Preliminary out-of-context vendor-tool routed fixed-core resource results; independent AI review",
  "task": {
    "filter": "Fixed exact 16-tap finite impulse response filter",
    "target_part": "xc7a35tcpg236-1",
    "input_bits": 16,
    "output_bits": 26,
    "stages": 7,
    "inputs_per_clock": 1,
    "timing_constraint_MHz": 100
  },
  "resource_counts": [
    {
      "core": "P0",
      "LUT": 339,
      "ordinary_registers": 538,
      "DSP": 7
    },
    {
      "core": "P9_logic3",
      "LUT": 199,
      "ordinary_registers": 503,
      "DSP": 7
    },
    {
      "core": "P9",
      "LUT": 165,
      "ordinary_registers": 419,
      "DSP": 8
    }
  ],
  "paired_reference_reduction_percent": {
    "P9_logic3_vs_P0_LUT": 41.29793510324484,
    "P9_logic3_vs_P0_ordinary_registers": 6.5055762081784385
  },
  "tradeoffs": {
    "P9": "One extra DSP block against P0; fewer LUTs and ordinary registers than P9_logic3. No scalar winner across resource axes.",
    "P9_24_vs_P9": {
      "added_LUT": 16,
      "added_ordinary_registers": 48,
      "DSP": 8,
      "decision": "No accepted useful isolation benefit; reject this tested integration."
    }
  },
  "review_scope": "Independent AI review of source reports, finite integer and RTL simulation checks and width bounds. No formal proof over all RTL states or board validation.",
  "not_established": [
    "Whole-device energy, heat, size or mass benefit",
    "Greater throughput from timing slack",
    "Tuned-vendor superiority or novelty",
    "Activity-based power estimate for P9_logic3",
    "Wider product fit"
  ],
  "sensing_illustrations": {
    "fixed_model": "Three independent channels, fixed unbiased variances. 12 readings meet the old balanced 13-reading quality limit; variance is 26/303 = 8.580858% above the optimized 13-reading plan. Ordinary exact planning can match.",
    "separate_energy_example": "Chosen 25% affected share and separate 1% FI plus 1% rail costs: combined change uses 8/1943 = 0.411734% more energy than ordinary lower rail. Illustrative assumptions; no calibrated device forecast."
  },
  "software_comparator_limitation": "The 15 October independent AI accounting review confirms that FI was slower than capable ordinary gmpy2 in all 26 preserved first-call and warm timing groups. That separate pilot and the internal 2,500-case H22 study use unlike scopes; their percentages cannot be combined. No new timings were run.",
  "source_identities": [
    {
      "title": "Fixed-core result",
      "record": "RESULTS_R1.json",
      "sha256": "4ed33549881d33223b423f1fbfcf26903524a85d2b02f86bede33852c0c58ed9"
    },
    {
      "title": "Mapping result",
      "record": "RESULTS_R2.json",
      "sha256": "48280928a98dba1fb5150041b6c0f888b67c75a66f517965f6f2515a511df40b"
    },
    {
      "title": "Independent AI FPGA review",
      "record": "VERDICT_R1.json",
      "sha256": "264f09c47aec416d92afad25d448522e5057a5e5373fe6398301e93303199ac3"
    },
    {
      "title": "Accounting report",
      "record": "COMPOSITION_DECISION_REPORT_R2.txt",
      "sha256": "fccb14eab075da4964a1c66eb09bee9b56a50bbd587fba8276c91a118c562726"
    },
    {
      "title": "Independent AI accounting review",
      "record": "CRITIC_VERDICT_R1.json",
      "sha256": "1af878625be95dc9f736aabbc053c737aa9f8e2fa542e613ae9b05e4e1057e70"
    },
    {
      "title": "Integration supplement",
      "record": "INTEGRATION_SUPPLEMENT_R2.json",
      "sha256": "d6beaed3acd20b4a98af922e6a67378a80f5da6f163e938f960abf63ab620c58"
    }
  ],
  "disclosure_scope": "Summary only; private evidence, RTL, coefficients and unfiled implementation details are not included."
}