6 what are the pros and cons of fixed length and variable length instructions
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27 Aug 2018 What are the advantages and disadvantages using of fixed and variable length extents ? What are the advantages and disadvantages of fixed length instructions as compared to variable length instructions? Which types are generally used in a RISC What are the advantages and disadvantages of using a variable-length instruction format? By: Suresh Kumar Mukhiya - In: Computer architecture - 0 comments. The instruction thus fed to the system can be of two types: fixed length instructions and variable length instructions. Advantages of fixed-length instructions are given below: It simplifies the process of instruction fetching. The instruction pointer is incremented by a constant amount. Advantages of fixed length instructions: - Easy decode (simple pipeline). In particular it is simple to decode several instructions in parallel, as the decode of the In some architectures, notably most reduced instruction set computers (RISC), instructions are a fixed length, typically fixed-length instructions· advantage: fixed-length instruction is fast and results in better performancewhen instruction levelpipelining is used.·.31 Jan 2014 A minor advantage of fixed length instructions compared to typical variable length encodings is that instruction addresses (and branch offsets) use fewer bits. This has been exploited in some ISAs to provide a small amount of extra storage for mode information. hint bits within its instruction, but compilers are not obliged to use them. Delayed Superscalar: advantage -- packing; disadvantage -- dependency check at rename is the fixed length usually requires too many no-ops, worse use of cache, Fixed length instructions are easier to decode; but Fixed length instructions waste Instructions and operands are implicitly taken from the stack; Advantages.