Source File
	popcnt_19.go

Belonging Package
	github.com/bits-and-blooms/bitset

//go:build go1.9
// +build go1.9

package bitset

import "math/bits"

func popcntSlice(s []uint64) uint64 {
	var cnt int
	for _, x := range s {
		cnt += bits.OnesCount64(x)
	}
	return uint64(cnt)
}

func popcntMaskSlice(s, m []uint64) uint64 {
	var cnt int
	// this explicit check eliminates a bounds check in the loop
	if len(m) < len(s) {
		panic("mask slice is too short")
	}
	for i := range s {
		cnt += bits.OnesCount64(s[i] &^ m[i])
	}
	return uint64(cnt)
}

func popcntAndSlice(s, m []uint64) uint64 {
	var cnt int
	// this explicit check eliminates a bounds check in the loop
	if len(m) < len(s) {
		panic("mask slice is too short")
	}
	for i := range s {
		cnt += bits.OnesCount64(s[i] & m[i])
	}
	return uint64(cnt)
}

func popcntOrSlice(s, m []uint64) uint64 {
	var cnt int
	// this explicit check eliminates a bounds check in the loop
	if len(m) < len(s) {
		panic("mask slice is too short")
	}
	for i := range s {
		cnt += bits.OnesCount64(s[i] | m[i])
	}
	return uint64(cnt)
}

func popcntXorSlice(s, m []uint64) uint64 {
	var cnt int
	// this explicit check eliminates a bounds check in the loop
	if len(m) < len(s) {
		panic("mask slice is too short")
	}
	for i := range s {
		cnt += bits.OnesCount64(s[i] ^ m[i])
	}
	return uint64(cnt)
}

The pages are generated with Golds v0.8.2. (GOOS=linux GOARCH=amd64)
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