github.com/c9s/go@v0.0.0-20180120015821-984e81f64e0c/src/runtime/cpuflags_amd64.go (about)

     1  // Copyright 2015 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package runtime
     6  
     7  var useAVXmemmove bool
     8  
     9  func init() {
    10  	// Let's remove stepping and reserved fields
    11  	processor := processorVersionInfo & 0x0FFF3FF0
    12  
    13  	isIntelBridgeFamily := isIntel &&
    14  		processor == 0x206A0 ||
    15  		processor == 0x206D0 ||
    16  		processor == 0x306A0 ||
    17  		processor == 0x306E0
    18  
    19  	useAVXmemmove = support_avx && !isIntelBridgeFamily
    20  }