// Copyright 2017 Pilosa Corp.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// +build amd64

package roaring

func hasAsm() bool

func BSFQ(memory uint64) int

func POPCNTQ(memory uint64) int


//go:noescape
var useAsm = hasAsm()

//go:noescape
func popcntSliceAsm(s []uint64) uint64

//go:noescape
func popcntMaskSliceAsm(s, m []uint64) uint64

//go:noescape
func popcntAndSliceAsm(s, m []uint64) uint64

//go:noescape
func popcntOrSliceAsm(s, m []uint64) uint64

//go:noescape
func popcntXorSliceAsm(s, m []uint64) uint64

//go:noescape
func popcntAsm(x uint64) uint64

func popcntSlice(s []uint64) uint64 {
	if useAsm {
		return popcntSliceAsm(s)
	}
	return popcntSliceGo(s)
}

func popcntMaskSlice(s, m []uint64) uint64 {
	if useAsm {
		return popcntMaskSliceAsm(s, m)
	}
	return popcntMaskSliceGo(s, m)
}

func popcntAndSlice(s, m []uint64) uint64 {
	if useAsm {
		return popcntAndSliceAsm(s, m)
	}
	return popcntAndSliceGo(s, m)
}

func popcntOrSlice(s, m []uint64) uint64 {
	if useAsm {
		return popcntOrSliceAsm(s, m)
	}
	return popcntOrSliceGo(s, m)
}

func popcntXorSlice(s, m []uint64) uint64 {
	if useAsm {
		return popcntXorSliceAsm(s, m)
	}
	return popcntXorSliceGo(s, m)
}

func popcnt(x uint64) uint64 {
	if useAsm {
		return popcntAsm(x)
	}
	return popcntGo(x)
}