Logout Open In App
Open In App
Warning: foreach() argument must be of type array|object, bool given in /var/www/html/web/app/themes/studypress-core-theme/template-parts/header/mobile-offcanvas.php on line 20

Chapter 2: Q15E (page 167)

Question: Provide the type and hexadecimal representation of the following instruction:

sw \(t1, 32(\)t2)

Short Answer

Expert verified

The instruction is i-type and the hexadecimal representation is 0xAD490032

Step by step solution

01

Determine the MIPS instruction types

The MIPS instructions are of two types R-type and I-type.

R-type instructions refer to the instructions that use the register values for performing operations.

I-Type instructions refer to the instructions that use the immediate values rather than the register values.

02

Determine a type and the hexadecimal representation of the instruction

The given instruction is I-type. The instructions sw and lw are of I type because of the offset value provided.

The instruction fields of the given instruction are as follows:

sw $t1,32($t2)





Opcode-6bits

rsource-5bits

rdestination-5bits

address-16bits

43

10

9

32

Convert all the above values to binary values:

1010 1101 0100 1001 0000 0000 0011 0010

Now convert the binary to hexadecimal:

0xAD490032

Therefore, the hexadecimal representation of the given instruction is 0xAD490032

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

[5] Consider the following MIPS loop:

LOOP: slt \(t2, \)0, \(t1

beq \)t2, \(0, DONE

subi \)t1, \(t1, 1

addi \)s2, \(s2, 2

j LOOP

DONE:

2.26.1 [5] <§2.7> Assume that the register \)t1 is initialized to the value 10. What is the value in register \(s2 assuming \)s2 is initially zero?

2.26.2 [5] <§2.7> For each of the loops above, write the equivalent C code routine. Assume that the registers \(s1, \)s2, \(t1, and \)t2 are integers A, B, i, and temp, respectively.

2.26.3 [5] <§2.7> For the loops written in MIPS assembly above, assume that the register $t1 is initialized to the value N. How many MIPS instructions are executed?

For each MIPS instruction, show the value of the opcode(OP), source register(RS), and target register(RT) fields. For the I-type instructions, show the value of the immediate field, and for the R-type instructions, show the value of the destination register(RD) field.

addi \(t0,\)s6,4

add \(t1.\)s6,\(0

sw \)t1, 0(\(t0)

lw \)t0,0(\(t0)

add \)s0,\(t1,\)t0

Question 2.4 [5] For the MIPS assembly instructions below, what is the corresponding C statement? Assume that the variables f, g, h, i, and j are assigned to registers \(s0, \)s1, \(s2, \)s3, and \(s4, respectively. Assume that the base address of the arrays A and B are in registers \)s6 and \(s7, respectively.

sll \)t0, \(s0, 2 # \)t0 = f * 4

add \(t0, \)s6, \(t0 # \)t0 = &A[f]

sll \(t1, \)s1, 2 # \(t1 = g * 4

add \)t1, \(s7, \)t1 # \(t1 = &B[g]

lw \)s0, 0(\(t0) # f = A[f]

addi \)t2, \(t0, 4

lw \)t0, 0(\(t2)

add \)t0, \(t0, \)s0

sw \(t0, 0(\)t1)

For the following C statement, write a minimal sequence of MIPS assembly instructions that does the identical operation. Assume \(t1=A, \)t2=B and $s1 is the base address of C.

A=C0□4;

The following instruction is not included in the MIPS instruction set:

rpt $t2, loop # if(R[rs]>0) R[rs]=R[rs]−1, PC=PC+4+BranchAddr

2.25.1 [5] <§2.7> If this instruction were to be implemented in the MIPS

instruction set, what is the most appropriate instruction format?

2.25.2 [5] <§2.7> What is the shortest sequence of MIPS instructions that

performs the same operation?
See all solutions

Recommended explanations on Computer Science Textbooks

Game Design in Computer Science

Read Explanation

Data Representation in Computer Science

Read Explanation

Algorithms in Computer Science

Read Explanation

Computer Network

Read Explanation

Computer Organisation and Architecture

Read Explanation

Problem Solving Techniques

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free