AMD's own Single Instruction Multiple Data (SIMD) instruction set, known since 1998 as 3DNow! is now up for retirement, with its maker saying that it won't be supported by various processors currently in the pipeline.
While lacking 3DNow! set, AMD's upcoming chips will, of course, support SSE (its many versions) so developers shouldn't have a big problem with running their apps smoothly using those instructions.
The memory of 3DNow! will live on though as the PREFETCH and PREFETCHW instructions are still going to be supported by new processors. Now where are those Fusion parts?