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package bitset
import "math/bits"
func popcntSlice(s []uint64) (cnt uint64) {
for _, x := range s {
cnt += uint64(bits.OnesCount64(x))
}
return
}
func popcntMaskSlice(s, m []uint64) (cnt uint64) {
// The next line is to help the bounds checker, it matters!
_ = m[len(s)-1] // BCE
for i := range s {
cnt += uint64(bits.OnesCount64(s[i] &^ m[i]))
}
return
}
// popcntAndSlice computes the population count of the AND of two slices.
// It assumes that len(m) >= len(s) > 0.
func popcntAndSlice(s, m []uint64) (cnt uint64) {
// The next line is to help the bounds checker, it matters!
_ = m[len(s)-1] // BCE
for i := range s {
cnt += uint64(bits.OnesCount64(s[i] & m[i]))
}
return
}
// popcntOrSlice computes the population count of the OR of two slices.
// It assumes that len(m) >= len(s) > 0.
func popcntOrSlice(s, m []uint64) (cnt uint64) {
// The next line is to help the bounds checker, it matters!
_ = m[len(s)-1] // BCE
for i := range s {
cnt += uint64(bits.OnesCount64(s[i] | m[i]))
}
return
}
// popcntXorSlice computes the population count of the XOR of two slices.
// It assumes that len(m) >= len(s) > 0.
func popcntXorSlice(s, m []uint64) (cnt uint64) {
// The next line is to help the bounds checker, it matters!
_ = m[len(s)-1] // BCE
for i := range s {
cnt += uint64(bits.OnesCount64(s[i] ^ m[i]))
}
return
}
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