feat(EPv2): hybrid backend — HIP dispatch + FlyDSL combine - #563
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kawhil-amd wants to merge 3 commits into
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feat(EPv2): hybrid backend — HIP dispatch + FlyDSL combine#563kawhil-amd wants to merge 3 commits into
kawhil-amd wants to merge 3 commits into
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Split KernelSet's stages_in_kernel / self_resets_counters into per-leg flags (dispatch_resets_counters, combine_resets_counters, combine_stages_in_kernel) so the base class can drive each leg with the correct reset and staging semantics independently. Add hybrid_backend.py: EpDispatchCombineOpHybrid uses HIP/JIT EpDispatchPlan for the dispatch leg and FlyDSL make_combine for the gather-combine leg, sharing one SymmArena. Selectable via MORI_V2_KERNEL_BACKEND=hybrid or cfg.kernel_backend="hybrid". Tuning cross-picks dispatch geometry from hip_tuning_configs and combine geometry from tuning_configs, merged via merge_buckets (renamed from _merge for importability). Backend parity test now covers all three backends (flydsl, hip, hybrid). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The hybrid backend accepted fp4/fp8 combine configs silently (no gate in _unsupported). Add an explicit combine_dtype check matching the bf16/fp32 constraint. Also update the test comment from "2 backends" to "3 arenas". Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
_arch/_is1250 were computed but never used: the HIP dispatch plan picks its portable-vs-TDM body at render time, and the gfx1250 combine fan buffer is irrelevant because hybrid combine is FlyDSL, not the TDM kernel. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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