golang util_gc 代码
文件路径：/src/cmd/dist/util_gc.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.
//go:build gc
// +build gc
package main
// useVFPv1 tries to execute one VFPv1 instruction on ARM.
// It will crash the current process if VFPv1 is missing.
func useVFPv1()
// useVFPv3 tries to execute one VFPv3 instruction on ARM.
// It will crash the current process if VFPv3 is missing.
func useVFPv3()
// useARMv6K tries to run ARMv6K instructions on ARM.
// It will crash the current process if it doesn't implement
// ARMv6K or above.
func useARMv6K()