
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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Transcribed Image Text:You are given an instruction set architecture (ISA) with a variable-length instruction encoding
scheme and instruction categories for a test program as tabulated in Table 1.
Table 1: Instruction Categories and Encoding Scheme
Instruction Length (bits)
Instruction Category
Frequency
40%
24
ALU operations
Loads
Stores
32
32
20%
20%
20%
16
Branches
A. Compute the average instruction length (AIL) for the variable-length instruction encoding
scheme in Table 1.
B. Compute the memory storage requirements (in bytes) for the test program under the
variable-length instruction encoding scheme (Table 1) if it contains 1 billion (i.e., 1 x 10º)
instructions.
C. Compute the memory savings (as a percentage) compared to a baseline fixed-length
instruction encoding scheme with 32 bits per instruction for the test program with 1 billion
(i.e., 1 x 10°) instructions.
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