docs: document MXFP numerics (mxfp8/mxfp4/nvfp4) and hardware dispatch#324
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docs: document MXFP numerics (mxfp8/mxfp4/nvfp4) and hardware dispatch#324lokic233 wants to merge 1 commit into
lokic233 wants to merge 1 commit into
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Qwix supports mxfp8, mxfp4, and nvfp4 as user-facing weight/activation qtypes, but they are absent from the user documentation. This adds a docs page covering: - Block/tile sizes (32 for mxfp8/mxfp4, 16 for nvfp4) - Scale format (e8m0fnu vs e4m3fn) - Hardware dispatch table (GPU fused via scaled_matmul; TPU/CPU native fp8 dot_general fallback) - Performance note about activation-quant overhead No code change — docs only.
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Summary
Qwix supports
mxfp8,mxfp4, andnvfp4as user-facingweight_qtype/act_qtype(seenumerics.py,qarray.pytile_size=32/16, and the PTQ/QT provider tests) but they are entirely absent from the user docs (docs/source/,README.md).This adds a
docs/source/mxfp.mdpage documenting:float8_e8m0fnuvsfloat8_e4m3fn)jax.nn.scaled_matmul; TPU/CPU fall through to native tiled fp8dot_general(_fast_dot_general), which is correct and MXU-acceleratedNo code change — docs only.