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{
  "commit": "ac3e5af7921f493386282083614a3a89113d07f3",
  "tree": "c81085fbf6d3e788fc887384dbd068e01a63126b",
  "parents": [
    "e4945117a114b6c7568686f91bae2f2f56addc0b"
  ],
  "author": {
    "name": "Pooja Hemashekar",
    "email": "hemashekar@roofline.ai",
    "time": "Wed Jul 22 19:04:31 2026 +0200"
  },
  "committer": {
    "name": "GitHub",
    "email": "noreply@github.com",
    "time": "Wed Jul 22 19:04:31 2026 +0200"
  },
  "message": "[Codegen] Materialize encoding info for convolution with NCHWc layout (#24714)\n\nImplements convolution encoding materialization for data-tiled layouts.\n\nLayouts:\n- Input:  [N, IC/c0, H, W, c0]\n- Filter: [OC/k0, IC/c0, FH, FW, c0, k0]\n- Output: [N, OC/k0, OH, OW, k0]\n\nwhere k0 and c0 are the inner tile sizes for the output and input\nchannels, respectively.\n\nScope:\n\n- Only 2D convolutions receive a data-tiled layout. \n- Grouped, depthwise, 1D, and 3D convolutions, and non-unit dilations,\nall materialize to the identity layout (existing un-tiled path, no\nbehavior change for these cases).\n   - Arbitrary strides are supported.\n- Supports packed rank-5 input/output and rank-6 filter tensors. Rank-4\ninput/output is also accepted when `N\u003d1` batch dimension has been folded\nby upstream passes.\n- Currently supports fp32 convolutions only.\n\nSupported input forms:\n- nhwc_hwcf\n- nchw_fchw\n- nhwc_fhwc\n\nAll are materialized to the same packed NCHWc layout above.\n\nArchitecture-specific inner tiles:\n\n| Architecture | Condition | Inner tile (OC, IC) | Target ISA |\n\n|--------------|-------------------|---------------------|-----------------|\n| x86-64 | float, `+avx512f` | `{16,16}` | `VFMADD*` (zmm) |\n| arm64 | float | `{8,8}` | `FMLA` (NEON) |\n\nAll other configurations materialize to the identity layout.\n\nLayout motivation can be found here:\nhttps://hackmd.io/@phemashekar/conv-dt-layout\n\n---\n\nCo-authored-by: Jelle Schuhmacher \u003cschuehmacher@roofline.ai\u003e\nCo-authored-By: Claude Opus 4.8 (1M context) \u003cnoreply@anthropic.com\u003e\nSigned-off-by: Pooja Hemashekar \u003chemashekar@roofline.ai\u003e\n\n---------\n\nSigned-off-by: Pooja Hemashekar \u003chemashekar@roofline.ai\u003e\nCo-authored-by: Jelle Schuhmacher \u003cschuehmacher@roofline.ai\u003e\nCo-authored-by: Ege Beysel \u003cbeyselege@gmail.com\u003e",
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