Computer Organization design

Classify the following attributes of a microprocessor as either a property of its microarchitecture or its instruction set architecture (ISA). Justify your answer when appropriate. The processor does not have a subtract instruction The comparison functional unit of the processor doesn't employ subtraction as the basis for performing the comparison of two operands. The processor implements a floating point multiply instruction in software One of the operands to an ADD instruction can be a 5-bit constant. An ADD instruction take N cycles to complete processing. The processor comprises 8 general purpose registers (GPRs) A 2-to-1 multiplexer couples to one of the input ports of the multiplication functional unit The cache memory has one address port and two data output ports