Yes, it's been studied. You rapidly run into diminishing returns. http://arxiv.org/ftp/arxiv/papers/1205/1205.1871.pdf http://arxiv.org/ftp/arxiv/papers/1205/1

Yes, it's been studied. You rapidly run into diminishing returns. http://arxiv.org/ftp/arxiv/papers/1205/1205.1871.pdf http://arxiv.org/ftp/arxiv/papers/1205/1205.1871.pdf Here's a good thread discussing this: https://groups.google.com/forum/#!searchin/comp.arch/number$20of$20registers/comp.arch/BClo97LG3mo/DhEfQXKaRM4J https://groups.google.com/forum/#!searchin/comp.arch/number$...