github.com/bytedance/sonic@v1.11.7-0.20240517092252-d2edb31b167b/internal/cpu/features.go (about)

     1  /*
     2   * Copyright 2021 ByteDance Inc.
     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 cpu
    18  
    19  import (
    20      `fmt`
    21      `os`
    22  
    23      `github.com/klauspost/cpuid/v2`
    24  )
    25  
    26  var (
    27      HasAVX  = cpuid.CPU.Has(cpuid.AVX)
    28      HasAVX2 = cpuid.CPU.Has(cpuid.AVX2)
    29      HasSSE = cpuid.CPU.Has(cpuid.SSE)
    30  )
    31  
    32  func init() {
    33      switch v := os.Getenv("SONIC_MODE"); v {
    34          case ""       : break
    35          case "auto"   : break
    36          case "noavx"  : HasAVX = false; fallthrough
    37          case "noavx2" : HasAVX2 = false
    38          default       : panic(fmt.Sprintf("invalid mode: '%s', should be one of 'auto', 'noavx', 'noavx2'", v))
    39      }
    40  }