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A processor has 40 distinct instructions and 24 general purpose registers. A 32-bit instruction word has an opcode, two register operands and an immediate operand. The number of bits available for the immediate operand field is ________.
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- 11
- 16
- 7
- 32
Correct Option: B
6 bits are needed for 40 distinct instructions (because, 32 < 40 < 64) 5 bits are needed for 24 general purpose registers (because, 16 < 24 < 32) 32-bit instruction word has an opcode(6 bit), two register operands(total 10 bits) and an immediate operand (x bits). The number of bits available for the immediate operand field => x = 32 – (6 + 10) = 16 bits
