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Stidhamjason, what do you mean with math coprocessor?
The CPU micro architecture now contains ALU’s (Arithmetic Logic Units) and FPU’s (Floating Point Units) that do the job of a traditional math coprocessor.
There have been improvements in the ALU/FPU instructions with Haswell processors.
Please check the following article for more information about these changes: http://www.anandtech.com/show/6355/intels-haswell-architecture/8