Consider the following fragment of Brookshear machine assembly language code: MOV FC -> R2 // Load R2 with 11111100 (binary) AND R1, R2 -> R1 // Put R1 AND R2 in R1 ROT R1, 2 // Rotate R1 by 2 bits right If the initial value held in R1 (register 1) is interpreted as a non-negative integer, what is the programmer's overall aim in writing this fragment of code?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Chapter1: Introduction
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Consider the following fragment of Brookshear machine assembly language code:
MOV FC -> R2 // Load R2 with 11111100 (binary)
AND R1, R2 -> R1 // Put R1 AND R2 in R1
ROT R1, 2
// Rotate R1 by 2 bits right
If the initial value held in R1 (register 1) is interpreted as a non-negative integer, what is the programmer's overall aim in writing this fragment of code?
O mask off the two least significant bits of the number stored in R2
O addition of the value in R1 to the value in R2
O division of the value in R1 by 4
O multiplication of the value in R1 by 2
Transcribed Image Text:Consider the following fragment of Brookshear machine assembly language code: MOV FC -> R2 // Load R2 with 11111100 (binary) AND R1, R2 -> R1 // Put R1 AND R2 in R1 ROT R1, 2 // Rotate R1 by 2 bits right If the initial value held in R1 (register 1) is interpreted as a non-negative integer, what is the programmer's overall aim in writing this fragment of code? O mask off the two least significant bits of the number stored in R2 O addition of the value in R1 to the value in R2 O division of the value in R1 by 4 O multiplication of the value in R1 by 2
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