golang cpu_gc_x86 代码
文件路径：/src/vendor/golang.org/x/sys/cpu/cpu_gc_x86.go
/ 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 (386 || amd64 || amd64p32) && gc
/ +build 386 amd64 amd64p32
/ +build gc
package cpu
/ cpuid is implemented in cpu_x86.s for gc compiler
/ and in cpu_gccgo.c for gccgo.
func cpuid(eaxArg, ecxArg uint32) (eax, ebx, ecx, edx uint32)
/ xgetbv with ecx = 0 is implemented in cpu_x86.s for gc compiler
/ and in cpu_gccgo.c for gccgo.
func xgetbv() (eax, edx uint32)