Merging CPU cores

I have an idea to increase single-thread performance.
CPU cores should be merged into one macrocore which give any core any available resources.
Example: you want to multiply 100 vectors in one non-multithreaded function.
Normally:one core will execute the operations using its own resources.
With macrocore:the multiplication will be assigned to all available SIMD/FPU/ALU units in the macrocore(all core units).

>>16
That's better than something like RaspPi which boots from a processor with no public documentation.

Also, http://www.coreboot.org/