Sideband Stack Optimizer ?

[dsouza123]

On the following linked page  http://forums.amd.com/devblog/categories.cfm?catid=271
for the new Barcelona CPUs it mentions a new Sideband Stack Optimizer is that also for 32 bit assembly ?

Also discussed are SSE4a instructions and IBS (Instruction Based Sampling) along with other new/modified assembly instructions.