COMPUTER SCIENCE AND ENGINEERING
COMPUTER ARCHITECTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2 byte
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3 byte
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4 byte
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8 byte
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Detailed explanation-1: -Explanation: Instruction in ARM machines is encoded into Four Byte Word. Explanation: The address space in ARM is 2^32.
Detailed explanation-2: -Each ARM instruction is encoded into a 32-bit word. Access to memory is provided only by Load and Store instructions. ARM data-processing instructions operate on data and produce new value. They are not like the branch instructions that control the operation of the processor and sequencing of instructions.
Detailed explanation-3: -For ARM, a word is 32-bits (4 bytes). A dword is 64-bits (8 bytes). This holds true from ARMv1 to latest ARMv8 architectures.
Detailed explanation-4: -The instruction format for ARM 32-bit processor is 32 bits. The I bit in instruction format is used to define type of Operand2, if I = 0 the operand2 is register, if I = 1 mean operand 2 is an immediate data. The following figure shows Data Processing Instruction formats.
Detailed explanation-5: -ARM has 16 data-processing instructions, shown in Table A3-2. Most data-processing instructions take two source operands, though Move and Move Not take only one.