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forgejo/vendor/github.com/RoaringBitmap/roaring/popcnt.go
2018-05-19 20:49:46 +08:00

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// +build go1.9
// "go1.9", from Go version 1.9 onward
// See https://golang.org/pkg/go/build/#hdr-Build_Constraints
package roaring
import "math/bits"
func popcount(x uint64) uint64 {
return uint64(bits.OnesCount64(x))
}