Computer Organization design Classify the following attribut

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

Solution

1) The processor doesn\'t have subtraction instruction : property of its microarchitecture : because subtraction can be acheived by addition itself i.e adding the number with the 2\'s complement of the second number resulting in subtraction of the two numbers. This decreases the hardware component of the microprocessor

2) its property of Instruction set architecture : as ADD takes less number of cycles to execute

3) its property of microarchitecture : as the architecture provides a separates set of registers for floating point operations

4) one of the operands to an ADD instruction can be a 5-bit constant : property of its instruction set architecture : completely depends upon the how the instructions are fetched and decoded and addressing modes from an instruction

5)An ADD instruction takes N cycles to complete processing : property of its microarchitecture : it depends of the N stage pipeling provided in the architecture of the microprocessor

6) the processor comprises 8 general purpose registers : its property of instruction set architecture

7) 2 to 1 multiplexor couples to one the input ports of the multiplication functional unit : property of its microarchitecture : the function of multiplexor completely depends upon the connection but not on the instruction