Libraries don’t cut it, IMO. Sometimes you want your complete input data in registers, 4x4 matrices fit there nicely. Other times you want to stream stuff from

Libraries don’t cut it, IMO. Sometimes you want your complete input data in registers, 4x4 matrices fit there nicely. Other times you want to stream stuff from memory, the above-mentioned 24x24 multiplication streams the complete matrix, while loading 4-long chunks of the vector. I’ve wrote an introduction article some time ago: http://const.me/articles/simd/simd.pdf http://const.me/articles/simd/simd.pdf Here’s more practical one: https://stackoverflow.blog/2020/07/08/improving-performance-with-simd-intrinsics-in-three-use-cases/ https://stackoverflow.blog/2020/07/08/improving-performance-...