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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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.
//go:build !noasm
// +build !noasm
package utils
import "golang.org/x/sys/cpu"
var byteToBoolFunc func([]byte, []bool)
func init() {
// if the cpu supports AVX2 or SSE4 then use SIMD to accelerate the conversion
// of a bitmap to a slice of bools in an optimized fashion, otherwise fallback
// to the pure go implementation
if cpu.X86.HasAVX2 {
byteToBoolFunc = bytesToBoolsAVX2
} else if cpu.X86.HasSSE42 {
byteToBoolFunc = bytesToBoolsSSE4
} else {
byteToBoolFunc = bytesToBoolsGo
}
}
// BytesToBools efficiently populates a slice of booleans from an input bitmap
func BytesToBools(in []byte, out []bool) {
byteToBoolFunc(in, out)
}
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