Microprocessor including an efficiency logic unit

A design structure tangibly embodied in a non-transitory computer-readable storage medium for designing, manufacturing, or testing an integrated circuit, the design structure comprising instructions that when executed by a processor generate a representation of hardware components comprising:

• a first arithmetic logic unit (ALU) to perform fixed point instructions using at least two general registers to read data from a first and second general register of a plurality of general registers and write a result in at least a third general register of the plurality of general registers a second ALU to perform non-updating fixed point instructions using at least two general registers to only read data from the general registers;
• and
• an efficiency logic unit coupled to the first ALU and the second ALU, the efficiency logic unit to receive an instruction and determine whether the received instruction is an updating fixed point instruction or a non-updating fixed point instruction based on a number of general registers to be used to execute the received instruction and send the received instruction to the first ALU if the received instruction is the updating fixed point instruction or to the second ALU if the received instruction is the non-updating fixed point instruction, wherein the efficiency logic unit is to compare the received instruction to a predetermined list or table of instructions that indicates that the first ALU or the second ALU is to execute the received instruction;
• and wherein the first ALU is to perform updating fixed point instructions and the second ALU is to exclusively perform the non-updating fixed point instructions, wherein the non-updating fixed point instructions comprise at least one arithmetic operation.