contrib/go/_std_1.18/src/runtime/cpuflags_amd64.go


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// 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
}