Consider the following high-level code snippet. Assume that the base addresses of arrayl and array2 are...
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Consider the following high-level code snippet. Assume that the base addresses of arrayl and array2 are held in R1 and R2 and that array2 is initialized before it is used. int i; int array1[100]; int array2[100]; for (i=0; i <100; i=i+1) array[i] = array2[1]; (a) Write the code snippet in ARM assembly without using pre- or post-indexing or a scaled register. Use as few instructions as possible (given the constraints). (b) Write the code snippet in ARM assembly with pre- or post-indexing and a scaled register available. Use as few instructions as possible. (c) Compare the difference in code density (i.e., number of instructions) between (a) and (b). Discuss any advantages or disadvantages. Consider the following high-level code snippet. Assume that the base addresses of arrayl and array2 are held in R1 and R2 and that array2 is initialized before it is used. int i; int array1[100]; int array2[100]; for (i=0; i <100; i=i+1) array[i] = array2[1]; (a) Write the code snippet in ARM assembly without using pre- or post-indexing or a scaled register. Use as few instructions as possible (given the constraints). (b) Write the code snippet in ARM assembly with pre- or post-indexing and a scaled register available. Use as few instructions as possible. (c) Compare the difference in code density (i.e., number of instructions) between (a) and (b). Discuss any advantages or disadvantages.
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Related Book For
Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
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