Source file src/github.com/cloudwego/base64x/cpuid.go

Documentation: github.com/cloudwego/base64x

     1  /*
     2   * Copyright 2024 CloudWeGo Authors
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package base64x
    18  
    19  import (
    20      `fmt`
    21      `os`
    22  
    23      `github.com/klauspost/cpuid/v2`
    24  )
    25  
    26  func hasAVX2() bool {
    27      switch v := os.Getenv("B64X_MODE"); v {
    28          case ""       : fallthrough
    29          case "auto"   : return cpuid.CPU.Has(cpuid.AVX2)
    30          case "noavx2" : return false
    31          default       : panic(fmt.Sprintf("invalid mode: '%s', should be one of 'auto', 'noavx2'", v))
    32      }
    33  }
    34  

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