GATE CS 2026 Set 2 — Question 44

MCQ+2 / -0.67MediumInstruction FormatsInstructions & Addressing ModesComputer Organization & Architecture

Computer Organization & Architecture → Instructions & Addressing Modes → Instruction Formats

Last updated 5 September 2026

Question

Consider a processor that has 16 general purpose registers and it uses 2-byte instruction format for all its instructions. Variable-sized opcodes are permitted. There are three different types of instructions; M-type, R-type, and C-type. Each M-type instruction has 2 register operands and a 6-bit immediate operand. Each R-type instruction has 3 register operands. Each C-type instruction has a register operand and a 6-bit offset value. If there are 2 unique M-type opcodes and 7 unique R-type opcodes, which one of the following options gives the maximum number of unique opcodes possible for C-type instructions?

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