func SSE2() bool {
	var info [4]uint32
	CpuId(&info, 1)
	return info[3]&(1<<26) != 0  
}
SSE2 returns true if the the CPU supports SSE2 instructions
package simd
func Available() bool {
	return SSE2()
}
func CpuId(info *[4]uint32, ax uint32)