lw $t3 , 0 ( $ t 3 ) and $t3 , $t3 , $ t 0 andi $t2 , $t2 , 0

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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What the code below does?

Consider the following code used to implement a new instruction: foo $t3,$t1,$t2:


mask : . word 0xFFFFF83F
start : la $t0 , mask
lw $t0 , 0 ( $ t 0 )
la $t3 , s h f t r
lw $t3 , 0 ( $ t 3 )
and $t3 , $t3 , $ t 0
andi $t2 , $t2 , 0 x 0 0 1 f
sll $t2 , $t2 , 6
or $t3 , $t3 , $ t 2
la $t5 , s h f t r
sw $t3 , 0 ( $ t 5 )

shftr: sll $t3 , $t1 , 0

What does foo does?

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