NEON isn't GPU, it's just the ARM equivalent to SSE/MMX. (Though a fair bit nicer to work with). It doesn't require extensive refactoring. There are patches to

NEON isn't GPU, it's just the ARM equivalent to SSE/MMX. (Though a fair bit nicer to work with). It doesn't require extensive refactoring. There are patches to use SIMD that aren't merged yet— though pure C improvements have tended to be more important since NEON isn't available on all ARM parts.