The open‑source llama.cpp library released version b11635 on 2026‑10‑15. It changes the CPU code to keep the FP16‑to‑FP32 lookup table on x86 processors that support the F16C instruction set. The prior change routed both scalar conversions through F16C, which slowed Q8_0/Q4_0 matrix‑multiply kernels by 45‑65 %. The new fix comments out the problematic define and restores the original table for FP16→FP32 conversions.
Why it matters
Developers running llama.cpp on Intel CPUs will get noticeably faster model inference after updating.
