Fast.bidx: def of lawful-bytes@0.1.1.0
Import: import lawful-bytes@0.1.1.0/fast.bend as Fast
Lines 27-29 of lawful-bytes@0.1.1.0/fast.bend: https://jend.leeeet.dev/read.txt?path=lawful-bytes@0.1.1.0/fast.bend&start_line=27&end_line=29

import Base

# The place (0-3) of the lowest flagged byte of a nonzero mask.
def bidx(+m: U32) -> U32:
  (b2u(U32.is_zero((m .&. 128 : U32))) + b2u(U32.is_zero((m .&. 32896 : U32))) + b2u(U32.is_zero((m .&. 8421504 : U32))) : U32)

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.add
  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.is_zero
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/fast.bend&name=b2u