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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 (
"bytes"
"io"
"sync"
"unsafe"
)
var bufferPool = sync.Pool{New: func() interface{} { return &bytes.Buffer{} }}
//go:noescape
func _unpack32_avx2(in, out unsafe.Pointer, batchSize, nbits int) (num int)
func unpack32Avx2(in io.Reader, out []uint32, nbits int) int {
batch := len(out) / 32 * 32
n := batch * nbits / 8
if n <= 0 {
return 0
}
buffer := bufferPool.Get().(*bytes.Buffer)
defer bufferPool.Put(buffer)
buffer.Reset()
buffer.Grow(n)
io.CopyN(buffer, in, int64(n))
var (
input = unsafe.Pointer(&buffer.Bytes()[0])
output = unsafe.Pointer(&out[0])
)
return _unpack32_avx2(input, output, len(out), nbits)
}
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