2. (10 points) Write a MIPS code that would switch the values of registers R1 an

Q: 2. (10 points) Write a MIPS code that would switch the values of registers R1 an

Below code is to swap the value of two registers R1 and R2 I am using a simple concept here, let's say R1=a and R2=b then R1=R1+R2=a+b then R2=R1-R2=(a+b)-b=a then R1=R1-R2=(a+b)-a=b This way the values of two registers will be switched Here is the required code for this problem: .text .glob1 main main: ADD R1,R1,R2 SUB R2,R1,R2 SUB R1,R1,R2 li $v0,10 # exit syscall .data

ID: 3709118 • Letter: 2

Question

2. (10 points) Write a MIPS code that would switch the values of registers R1 and R2. Your code SHOULD NOT use Loads/Stores. Your code SHOULD use the MIPS syntax explained in class.

In a style similar to this

ADDI R1, R0, #1

SW R1, 2000 (R0)

LOOP: LW R1, 2000 (R0)

MULT R2, R1, #4

ADDI R3,R2, #5000

LW R4, 0 (R3)

LW R5, 1500 (R0)

ADD R6, R4, R5

LW R1, 2000 (R0)

MULT R2, R1, #4

ADDI R1, R1, #1

SW R6, 0(R7) S

W R1, 2000 (R0)

ADDI R1, R1, #1

SW R1, 2000 (R0)

ADDI R1, R1, #1

LW R1, 2000 (R0)

ADDI R8, R1, #-101

BNEZ R8, LOOP

Explanation / Answer

Below code is to swap the value of two registers R1 and R2

I am using a simple concept here, let's say R1=a and R2=b

then R1=R1+R2=a+b

then R2=R1-R2=(a+b)-b=a

then R1=R1-R2=(a+b)-a=b

This way the values of two registers will be switched

Here is the required code for this problem:

.text

.glob1 main

main:

ADD R1,R1,R2

SUB R2,R1,R2

SUB R1,R1,R2

li $v0,10 # exit

syscall

.data

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2. (10 points) Write a MIPS code that would switch the values of registers R1 an

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