github.com/apache/arrow/go/v16@v16.1.0/arrow/math/math_amd64.go (about)

     1  // Licensed to the Apache Software Foundation (ASF) under one
     2  // or more contributor license agreements.  See the NOTICE file
     3  // distributed with this work for additional information
     4  // regarding copyright ownership.  The ASF licenses this file
     5  // to you under the Apache License, Version 2.0 (the
     6  // "License"); you may not use this file except in compliance
     7  // with the License.  You may obtain a copy of the License at
     8  //
     9  // http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  // Unless required by applicable law or agreed to in writing, software
    12  // distributed under the License is distributed on an "AS IS" BASIS,
    13  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  // See the License for the specific language governing permissions and
    15  // limitations under the License.
    16  
    17  // +build !noasm
    18  
    19  package math
    20  
    21  import (
    22  	"golang.org/x/sys/cpu"
    23  )
    24  
    25  func init() {
    26  	if cpu.X86.HasAVX2 {
    27  		initAVX2()
    28  	} else if cpu.X86.HasSSE42 {
    29  		initSSE4()
    30  	} else {
    31  		initGo()
    32  	}
    33  }
    34  
    35  func initAVX2() {
    36  	initFloat64AVX2()
    37  	initInt64AVX2()
    38  	initUint64AVX2()
    39  }
    40  
    41  func initSSE4() {
    42  	initFloat64SSE4()
    43  	initInt64SSE4()
    44  	initUint64SSE4()
    45  }
    46  
    47  func initGo() {
    48  	initFloat64Go()
    49  	initInt64Go()
    50  	initUint64Go()
    51  }