Apparently my memory is false, I thought originally the salsa20 variants and machine code were on cryp.to in my memory, but Dan Berstein's site is - https://cr.yp.to/
While at a startup when we were looking at data at rest encryption, streaming encryption and other such things. Dan had a page with different implementations (cross compiled from his assembler representation) to target chipsets and instruction sets. Using VMs (this was the early/mid 2000s) and such, it was interesting to see what of those instruction sets were supported. In testing, there would be occasional hiccups where an implementation wasn't fully supported though the VM claimed such.
While at a startup when we were looking at data at rest encryption, streaming encryption and other such things. Dan had a page with different implementations (cross compiled from his assembler representation) to target chipsets and instruction sets. Using VMs (this was the early/mid 2000s) and such, it was interesting to see what of those instruction sets were supported. In testing, there would be occasional hiccups where an implementation wasn't fully supported though the VM claimed such.