tree f7550269b56222e524eeb18f34ce46faf7de0731
parent 6cc5c164ba96d339f06cbcede0d17d2c96ce3c05
author Felix Miller <felix.miller@gi-de.com> 1613612895 +0100
committer Felix Miller <mail@felix-miller.de> 1614773474 +0100

[otbn] add optimized 384 bit Barrett mult for P-384

Adds a variant for the 384 bit Barrett redcution
based modular multiplication algorithm optimized
for and limited to the NIST P-384 curve.

Differences to generic version:
- The multiplication sequences are inline to reduce
  move instructions and enbale different configurations
  for the multiplications
- Use optimized multiplication sequences exploiting the
  special form of the P-384 modulus
- Only a single conditional subtract of the modulus at
  the end

Signed-off-by: Felix Miller <felix.miller@gi-de.com>