x64 = x86_64 = amd64 64位指令集,是对IA-32的扩展,由AMD提出,implemented by AMD,Intel.可兼容32位指令集(IA-32) 目前大部分64位计算机均使用这套指令集. 为什么叫x86-64,因为它是X86的一部分,兼容X86的其他指令集(32-bit,16-bit). 详见wiki x86-64 (also known as x64, x86_64 and AMD64[note 1]) is the 64-bit version of the x…