W64.mul128: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/src/math/w64.bend as W64
Lines 407-409 of bend-collections-laws-crypto@1.0.0.0/src/math/w64.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/src/math/w64.bend&start_line=407&end_line=409

import Base
import bend-collections-laws-crypto@1.0.0.0/src/math/u64.bend as W

# the full product as (low 64 bits, high 64 bits)
def mul128(+a: W.U64, +b: W.U64) -> W.U64 & W.U64:
  mul128_mid(mul32(lo(a), lo(b)), mul32(lo(a), hi(b)), mul32(hi(a), lo(b)), mul32(hi(a), hi(b)))

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/math/u64.bend&name=U64
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/math/w64.bend&name=hi
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/math/w64.bend&name=lo
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/math/w64.bend&name=mul128_mid
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/math/w64.bend&name=mul32