github.com/cloudwego/dynamicgo@v0.2.6-0.20240519101509-707f41b6b834/internal/cpu/features.go (about)

     1  /*
     2   * Copyright 2023 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 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 "":
    35  		break
    36  	case "auto":
    37  		break
    38  	case "noavx2":
    39  		HasAVX2 = false
    40  	default:
    41  		panic(fmt.Sprintf("invalid mode: '%s', should be one of 'auto', 'noavx2'", v))
    42  	}
    43  }