CipherModes.cm.mask: def of bend-osdev-cipher-modes@0.1.0.0
Import: import bend-osdev-cipher-modes@0.1.0.0/cipher_modes.bend as CipherModes
Lines 257-259 of bend-osdev-cipher-modes@0.1.0.0/cipher_modes.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-cipher-modes@0.1.0.0/cipher_modes.bend&start_line=257&end_line=259

import Base

# 0 for a 0 bit, all ones for a 1 bit (the low bit of b)
def cm.mask(b: U32) -> U32:
  U32.sub(0, U32.and(1, b))

Uses (3):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.sub