Yeah, 64 bit handles almost all use cases we have. Sometimes we want double the precision (a double) or length (a long), but we can do that without being 128-bit. It’s harder to do half. Sure, it’d be slightly faster for some things, but it’s not significant.
There’s plenty of instructions for processing integers and fp numbers from 8 bits to 512 bits with a single instruction and register. There’s been a lot of work in packed math instructions for neural network inference.
Yeah, 64 bit handles almost all use cases we have. Sometimes we want double the precision (a double) or length (a long), but we can do that without being 128-bit. It’s harder to do half. Sure, it’d be slightly faster for some things, but it’s not significant.
And you can get 128-bit data to the CPU, so those things can be fast if we need them to be.
There’s plenty of instructions for processing integers and fp numbers from 8 bits to 512 bits with a single instruction and register. There’s been a lot of work in packed math instructions for neural network inference.