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Type:
Task
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Resolution: Fixed
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Priority:
Major - P3
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Affects Version/s: None
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Component/s: None
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None
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Fully Compatible
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Execution Team 2021-07-12, Execution Team 2021-07-26, Execution Team 2021-08-09
Regular Simple-8b will encode blocks in the buckets the following way
Nr ValueBits Elems Padding 1 1 60 0 2 2 30 0 3 3 20 0 4 4 15 0 5 5 12 0 6 6 10 0 7 7 8 4 8 8 7 4 9 10 6 0 10 12 5 0 11 15 4 0 12 20 3 0 13 30 2 0 14 60 1 0
The four padding bits in selector 7 and 8 can be used to extend the amount of selectors. We want to use them to describe a bit shift where large values with many trailing zeros can be compressed efficiently.
SelectorNr PaddingValue Elems ValueBits ShiftBits 7 1 9 2 4 7 2 8 3 4 7 3 7 4 4 7 4 6 5 4 7 5 5 7 4 7 6 4 10 4 7 7 3 14 4 7 8 2 24 4 7 9 1 52 4
Extend Simple-8b encoder/decoder to handle these extended selectors.
Extend calculation of optimal selector to handle these values too.