I used the Intel Software Development Emulator (SDE) about a decade ago. It lets you develop and test software on a CPU that doesn't have the necessary vector extensions (AVX, etc.). I presume it uses the SIGILL trapping technique. In practice, I found it to be about 1000× slower than native - but that's why it's intended to be a development tool. https://www.intel.com/content/www/us/en/developer/articles/t...