For Intel CPUs, it's most likely based on Architectures Optimization Reference Manual published by Intel - https://www.intel.com/content/dam/www/public/us/en/do

For Intel CPUs, it's most likely based on Architectures Optimization Reference Manual published by Intel - https://www.intel.com/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-optimization-manual.pdf https://www.intel.com/content/dam/www/public/us/en/documents...