func math/bits.OnesCount64

7 uses

	math/bits (current package)
		bits.go#L121: 	return OnesCount64(uint64(x))
		bits.go#L140: func OnesCount64(x uint64) int {

	golang.org/x/sys/unix
		affinity_linux.go#L81: 		c += bits.OnesCount64(uint64(b))

	google.golang.org/protobuf/internal/impl
		decode.go#L238: 	if mi.numRequiredFields > 0 && bits.OnesCount64(requiredMask) != int(mi.numRequiredFields) {
		lazy.go#L425: 	if mi.numRequiredFields > 0 && bits.OnesCount64(requiredMask) != int(mi.numRequiredFields) {
		validate.go#L560: 		if numRequiredFields > 0 && bits.OnesCount64(st.requiredMask) != numRequiredFields {

	google.golang.org/protobuf/internal/set
		ints.go#L14: 	return bits.OnesCount64(uint64(*bs))

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