> 186 kLoC of hand-written assembly

That's for x86_64(SSE3, AVX2), ARMv7 and ARMv8 right? Is the 186kLoC equally distributed between those arch or is there one arch that has most of the optimization focus?

Is it all hand-written, or do you have some kind of script/macros to create a good part of this assembly (like OpenSSL does IIRC)?