+++ /dev/null
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build amd64,!appengine,!gccgo
-
-package intsets
-
-func popcnt(x word) int
-func havePOPCNT() bool
-
-var hasPOPCNT = havePOPCNT()
-
-// popcount returns the population count (number of set bits) of x.
-func popcount(x word) int {
- if hasPOPCNT {
- return popcnt(x)
- }
- return popcountTable(x) // faster than Hacker's Delight
-}