U32.U32Nat.low: def of bend-osdev-u32@0.1.0.0
Import: import bend-osdev-u32@0.1.0.0/u32.bend as U32
Lines 56-63 of bend-osdev-u32@0.1.0.0/u32.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-u32@0.1.0.0/u32.bend&start_line=56&end_line=63

import Base

# the low k bits of x (x mod 2^k), and the rest (x / 2^k, rounded down):
# x = low(k, x) + 2^k high(k, x)
def U32Nat.low(k: Nat, +x: Nat) -> Nat:
  match k:
    case 0n:
      0n
    case 1n+j:
      Nat.add(U32Nat.odd(x), Nat.double(U32Nat.low(j, U32Nat.half(x))))

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.double
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-u32@0.1.0.0/u32.bend&name=U32Nat.half
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-u32@0.1.0.0/u32.bend&name=U32Nat.odd