ggml-org/llama.cpp b8400

on GitHub

hexagon: add neg, exp, sigmoid, softplus ops, cont, repeat ops (#20701)

Add element-wise unary ops needed by Qwen 3.5's DeltaNet linear
attention layers. These ops follow the existing unary-ops pattern
with VTCM DMA double-buffering.

• neg: negate via scale by -1.0
• exp: uses existing hvx_exp_f32 HVX intrinsics
• sigmoid: uses existing hvx_sigmoid_f32_aa HVX intrinsics
• softplus: log(1 + exp(x)) scalar fallback
• CONT reuses the existing CPY infrastructure since making a tensor
  contiguous is equivalent to a same-type copy.
• REPEAT implements tiled memory copy with multi-threaded execution via
  the worker pool, supporting f32 and f16 types. The kernel parallelizes
  across output rows and uses memcpy for each tile.

Co-authored-by: Max Krasnyansky maxk@qti.qualcomm.com