Intel provides a tool that emulates instructions which are unsupported by the host CPU, so it's likely that the code was tested before hardware became available

Intel provides a tool that emulates instructions which are unsupported by the host CPU, so it's likely that the code was tested before hardware became available. https://software.intel.com/en-us/articles/intel-software-development-emulator https://software.intel.com/en-us/articles/intel-software-dev... > Intel is releasing this Intel SDE so that developers can gain familiarity with our upcoming instruction set extensions.