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Elementary,Middle School,High School,College,University,PHD
| Teaching Since: | May 2017 |
| Last Sign in: | 398 Weeks Ago, 3 Days Ago |
| Questions Answered: | 66690 |
| Tutorials Posted: | 66688 |
MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
Suppose A is a 10 × 10 array of (4-byte) integers, indexed from [0][0] through [9][9]. Suppose further that the address of A is currently in register r1, the value of integer i is currently in register r2, and the value of integer j is currently in register r3. Give pseudo-assembly language for a code sequence that will load the value of A[i][j] into register r1 (a) assuming that A is implemented using (row-major) contiguous allocation; (b) assuming that A is implemented using row pointers. Each line of your pseudocode should correspond to a single instruction on a typical modern machine. You may use as many registers as you need. You need not preserve the values in r1, r2, and r3. You may assume that i and j are in bounds, and that addresses are 4 bytes long. Which code sequence is likely to be faster? Why?
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