Using Three-state logic to speed up floating point multiplication
You are confusing tri-state signalling with ternary logic.

There is no efficient way of implementing ternary logic in a modern CMOS microchip. Tri-stated ("floating") signals cannot be used as a third state; a floating signal that is not pulled either high or low will behave unpredictably. (In most situations, gate capacitance within the chip will cause it to remain in whatever state it was last.)