var math/bits.deBruijn64tab 2 uses math/bits (current package) bits.go#L45: var deBruijn64tab = [64]byte{ bits.go#L99: return int(deBruijn64tab[(x&-x)*deBruijn64>>(64-6)])
The pages are generated with Golds v0.4.9. (GOOS=linux GOARCH=amd64)