Operating Systems and Networking Coursework Example | Topics and Well Written Essays - 1250 words

Operating Systems and Networking - Coursework Example the following fields: opcode: 8 bits ra: 6 bits rb: 6 bits rc: 6 bits rd: 6 bits where ra, rb, rc, specify three input registers and rd specifies one destination register. If there is a single register file to store the identifications of all registers, how many registers could there be in that register file? 1.3. A processor has 24 registers, uses 8-bit immediate, and has 36 different instructions (corresponding to 36 operation codes) in its instruction set. These 36 instructions are classified into 4 types as listed below: Assume that the ISA requires that all instructions be multiple of 8 bits (1 byte) in length, and the operation codes (opcodes) are fixed length. Answer the following questions and write down the calculation steps involved. Type C: 6 bits of the operation code, 5 bits for the source register, 8 bits of the immediate, and 5 bits of the destination register. This totals to 19 bits. These are rounded up again to 24 bits. 24 bits are equivalent to 3 bytes. Therefore 3 bytes are required to encode type c instruction. The pipelining diagram is used to show the execution of a series or a sequence of instructions of processes of a computer. In the diagram, the sequence of instructions is shown vertically; that is from the top to the bottom. As for the clock cycles, they are often shown in the horizontal; that is from the left to the right. Each and every instruction is divided into its component stages. There are 3 instructions. Suppose a non-pipelining processor took 50 Nano seconds to process one instruction, and then it would take 3 * 50 = 150 Nano seconds to complete all the instructions. However when pipelining is used, we instead have 4 segment pipeline with a clock cycle that takes at least 10 Nano seconds approximately. 2.2. Suppose we have a slightly more complex program with data dependency and branches. Assume that in the case of branching, the instruction following a branch is always executed. Note that a conditional branch