golang cpuflags_amd64 代码
文件路径：/src/runtime/cpuflags_amd64.go
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package runtime
import (
"internal/cpu"
)
var useAVXmemmove bool
func init() {
// Let's remove stepping and reserved fields
processor := processorVersionInfo & 0x0FFF3FF0
isIntelBridgeFamily := isIntel &&
processor == 0x206A0 ||
processor == 0x206D0 ||
processor == 0x306A0 ||
processor == 0x306E0
useAVXmemmove = cpu.X86.HasAVX && !isIntelBridgeFamily
}