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I'm trying to see the logic utilization in spartan3 for building a 4-input comparator. for case A>B, if the input is 2bit, the logic utilization is one 4-input LUT. Pretty obvious. A0,A1,B0,B1 inputs and one Y output. But for 4-input comparator, the logic utilization is three 4-input LUTs and mux. But Why???????????????
I have made a good 4:1 mux it can take to 2 bits of opcode input. The opcodes are 00,01,10 and 11. I call it the No Failure Multiplexor or NF mux for short. If you want it and cannot copy and paste it email me at forest_201@hot mail.com. NOTE : THIS IS NOT A JOKE. IT IS A REAL