For the cover letter of this patch-set, please checkout D146872.
Depends on D147913.
This is the 8th patch of the patch-set.
This patch is a proof-of-concept and will be extended to full coverage
in the future. Currently, the old non-tuple indexed segment load is
not removed, and only signed integer indexed segment load of NF=2,
EEW=32 is defined here.
Same comment as last review