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camel-cdr
7 months ago
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Summing ASCII encoded integers on Haswell at almos...
Given that the input is "integers uniformly sampled from [0, 2³¹−1]" couldn't you use a LUT for the 99.99% case of just 10/9/8 digit numbers instead and have a cold branch the handle the very rare smaller numbers.
anonymoushn
7 months ago
[–]
Yes, maybe if one is clever and lucky this could cost only a popcnt and a branch? not sure.
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