It is common to find assembly-code lines of the form xorq %rcx, %rcx In code that was

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It is common to find assembly-code lines of the form

xorq %rcx, %rcx

In code that was generated from C where no exclusive-or operations were present.

A. Explain the effect of this particular exclusive-or instruction and what useful operation it implements.

B. What would be the more straightforward way to express this operation in assembly code?

C. Compare the number of bytes to encode any two of these three different implementations of the same operation.

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Computer Systems A Programmers Perspective

ISBN: 9781292101767

3rd Global Edition

Authors: Randal E. Bryant, David R. O'Hallaron

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Question Posted: Nov 06, 2023 10:10 AM

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It is common to find assembly-code lines of the form xorq %rcx, %rcx In code that was

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A This instruction is used to set register rcx to zero expl...View the full answer

Computer Systems A Programmers Perspective

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