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3216efef2e
* use 128 bit loads (i've tried 256->128 to death and its slower) * double accumulator * avx bf16 vec dot * +3% q4_0 inference * +7% tg +5% pp compared to master * slower f16c version, kep for reference * 256b version, also slow. i tried :) * revert f16 * faster with madd * split to functions * Q8_0 and IQ4_NL, 5-7% faster * fix potential overflow (performance reduced) * 16 bit add for q4_0 only * merge