Sha512.rotr: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/spec/crypto/sha512.bend as Sha512
Lines 54-58 of bend-collections-laws-crypto@1.0.0.0/spec/crypto/sha512.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/spec/crypto/sha512.bend&start_line=54&end_line=58

import Base
import bend-collections-laws-crypto@1.0.0.0/src/crypto/sha512/types.bend as T

# FIPS 180-4 section 3.2: ROTR^n(x) = (x >> n) OR (x << 64 - n), 0 < n < 64.
def rotr(x: T.Lane, +n: Nat) -> T.Lane:
  match x:
    case T.W{+hi, +lo}:
      rotr_split(hi, lo, n, Nat.is_lt(n, 32n))

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_lt
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/spec/crypto/sha512.bend&name=rotr_split
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/sha512/types.bend&name=Lane