V1 Hashing algorithms

[stp59]

Hashing algorithms currently implemented:

• identity
• random
• crc16

Hashing algorithms currently unimplemented:

• crc16_custom
• crc32
• crc32_custom
• xor16
• csum16

[hackedy]

This is highly unscientific since some of these tests are probably PSA tests or otherwise unsupported, but:

% find ~/dev/petr4 -name '*.p4' | xargs grep '\<HashAlgorithm\.' | sed -E 's/.*HashAlgorithm.([a-z_0-9]+).*/\1/' | sort | uniq -c | sort -g
   9 lookup3
  12 crc32
  25 identity
  32 crc16
 177 csum16

[hackedy]

Oh, oops, that's a bad command line and not counting what I thought it was counting.

[hackedy]

In reality it's more like this. And I checked and only 5 of the tests using csum16 actually have STF files for us to run.

   2 lookup3
   4 crc32
  13 identity
  14 crc16
  49 csum16

[stp59]

Update: the implementation of v1model currently supports identity, random, csum16, and crc16. crc16 is currently buggy, causing one test case to fail. most of the tests use csum16, which is working correctly.

[hackedy]

Moving the 1 crc16 test to unsupported.