ggml-org/llama.cpp b8347

on GitHub

hexagon: Q4_0 and MXFP4 repack fixes (#20527)

• hexagon: fix tail corruption with rows sizes not multiple of 256

• hexagon: use different stride for repacking partial blocks

• hex-mm: update repack and kernels to avoid shuffles for full 256-element blocks

Previous commit changed the repacking to use even:odd (0:1,2:3,..) packing
instead of the original (0:128,1:129,...) packing in order to fix tail corruption.
Since the mm kernels already deal with partial tails we can use even:odd
packing only for the last block.
This avoid performance penalty of having to shuffle to zip the elements
in the common case.

• hex-mm: update rmpy x8 for better optimizations

• hex-mm: tighten supported MUL_MAT checks to avoid spurios failures

• hex-mm: use vzero to init accumulators

• hex-mm: properly call partial rmpy_x8