Auto Packed Registers logic option

Allows the Compiler to implement a register and a combinational function in the same logic cell, or to implement registers using I/O cells, RAM blocks, or DSP blocks instead of logic cells. This option controls how aggressively the Fitter combines registers with other function blocks in order to reduce logic element count. When using the Auto Packed Registers option, you must turn on the Optimize IOC Register Placement for Timing logic option.