230 s15 h03 tvvu3 .pdf

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Author: Truong

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Name: Truong Vu
Email: tvvu3@asu.edu
1. Xor $s7, $a3, $t5
Find the code from the references
Op code = 000000
Shamt = 000000
Xor = 100110
$s7 = 23 = 10111
$a3 = 7 = 00111
$t5 = 13 = 01101
Use the R-format to put the binary values in the correct location
000000 00111 01101 10111 000000 100110
Convert Binary To Hex.
Answer: 0x01DB_7026

2. ori $s1, $zero, 21345
Find the code from the reference sheet.
Ori = 001101
$s1 = 17 = 10001
$zero = 0 = 00000
21345 = 0101001101100001
Use the I-format to put the binary values in the correct location
001101 00000 10001 0101001101100001
Convert Binary To Hex.
Answer: 0x3411_5361

3. Convert Hex to Binary
0x3C01_1001 = 0011 1100 0000 0001 0001 0000 0000 0001
Find the op code and look it up in the reference sheet.
Op code = 001111 = lui
Lower 16 bits are 0
Find T = First 5 digits after the op code.
T = 00001 = $at
Answer: Lui $at, imm

4. Convert Hex to Binary
0x0011_4B43 = 0000 0000 0001 0001 0100 1011 0100 0011
Find the op code and the function
Op code = 000000 (R Format)
Funct = 000011 = sra
Syntax: sra rd, rt, shamt
Use R-Format to find what each binary sequence means.
Encoding: 000000 00000 10001 01001 01101 000011
op

rs

rt

rs: unused
rt: 10001 = $17 = $s1
rd: 01001 = $9 = $t1
shamt: 01101 = 13
Instruction: sra $t1, $s1, 13

rd

shamt funct


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