golang cpu_gc_arm64 代码
文件路径：/src/vendor/golang.org/x/sys/cpu/cpu_gc_arm64.go
/ Copyright 2019 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 gc
/ +build gc
package cpu
func getisar0() uint64
func getisar1() uint64
func getpfr0() uint64