onnxruntime

954dbce2 - webgpu: Refactor SubgroupMatrixMatMulNBits to vendor-agnostic config … (#28109)

webgpu: Refactor SubgroupMatrixMatMulNBits to vendor-agnostic config … (#28109) …+ add NVIDIA 16x16x16 Refactor subgroup matrix MatMulNBits support from vendor-specific (Apple/Intel) to a vendor-agnostic config-based approach. Any GPU reporting a matching subgroup matrix config from Dawn is now automatically supported. Key changes: - Replace vendor-specific config table with SupportedSubgroupMatrixConfig struct containing {componentType, resultComponentType, M, N, K, subgroupMinSize, subgroupMaxSize, needsPrepack}. No architecture or backendType required. - Remove vendor_ member from SubgroupMatrixMatMulNBitsProgram. Shader selection is now driven by config dimensions (8x8x8, 8x16x16, 16x16x16). - Remove vendor gate in matmul_nbits.cc call site. - Rename shader templates: _apple -> _8x8x8, _intel -> _8x16x16. - Add new 16x16x16 shader template for NVIDIA Blackwell (RTX 5080). - 4 subgroups x 32 lanes = 128 threads per workgroup - 64x64 tile with 16x16 subgroup matrices - Bounds-checked output via scratch buffer for partial M tiles - Fix prepack shader OOB reads: add scalar fallback with zero-fill for partial blocks where M is not a multiple of kSgMatM. - Prioritize larger configs (16x16x16 > 8x16x16 > 8x8x8) when multiple match. Verified on NVIDIA RTX 5080 (Blackwell, Vulkan backend): - Correctness: model-qa.py with phi4-graph-prune produces identical output to D3D12 baseline - Prefill (phi4, l=1024): phi4-graph-prune | D3D12 DP4A | Vulkan DP4A | Vulkan TC (16x16x16) | Vulkan TC (16x16x16_128) -- | -- | -- | -- | -- Prefill (tps) | 3,134 | 6,389 | 7,089 | 10,744 - NVIDIA reports ChromiumExperimentalSubgroupMatrix with F16/F16 16x16x16 config ### Description <!-- Describe your changes. --> ### Motivation and Context <!-- - Why is this change required? What problem does it solve? - If it fixes an open issue, please link to the issue here. -->