// Copyright 2018 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. // //go:build !purego package subtle import "golang.org/x/sys/cpu" var useAVX2 = cpu.X86.HasAVX2 //go:noescape func xorBytes(dst, a, b *byte, n int)