8.4: Exercises
- Page ID
- 19907
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\(\newcommand{\avec}{\mathbf a}\) \(\newcommand{\bvec}{\mathbf b}\) \(\newcommand{\cvec}{\mathbf c}\) \(\newcommand{\dvec}{\mathbf d}\) \(\newcommand{\dtil}{\widetilde{\mathbf d}}\) \(\newcommand{\evec}{\mathbf e}\) \(\newcommand{\fvec}{\mathbf f}\) \(\newcommand{\nvec}{\mathbf n}\) \(\newcommand{\pvec}{\mathbf p}\) \(\newcommand{\qvec}{\mathbf q}\) \(\newcommand{\svec}{\mathbf s}\) \(\newcommand{\tvec}{\mathbf t}\) \(\newcommand{\uvec}{\mathbf u}\) \(\newcommand{\vvec}{\mathbf v}\) \(\newcommand{\wvec}{\mathbf w}\) \(\newcommand{\xvec}{\mathbf x}\) \(\newcommand{\yvec}{\mathbf y}\) \(\newcommand{\zvec}{\mathbf z}\) \(\newcommand{\rvec}{\mathbf r}\) \(\newcommand{\mvec}{\mathbf m}\) \(\newcommand{\zerovec}{\mathbf 0}\) \(\newcommand{\onevec}{\mathbf 1}\) \(\newcommand{\real}{\mathbb R}\) \(\newcommand{\twovec}[2]{\left[\begin{array}{r}#1 \\ #2 \end{array}\right]}\) \(\newcommand{\ctwovec}[2]{\left[\begin{array}{c}#1 \\ #2 \end{array}\right]}\) \(\newcommand{\threevec}[3]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \end{array}\right]}\) \(\newcommand{\cthreevec}[3]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \end{array}\right]}\) \(\newcommand{\fourvec}[4]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \\ #4 \end{array}\right]}\) \(\newcommand{\cfourvec}[4]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \\ #4 \end{array}\right]}\) \(\newcommand{\fivevec}[5]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \\ #4 \\ #5 \\ \end{array}\right]}\) \(\newcommand{\cfivevec}[5]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \\ #4 \\ #5 \\ \end{array}\right]}\) \(\newcommand{\mattwo}[4]{\left[\begin{array}{rr}#1 \amp #2 \\ #3 \amp #4 \\ \end{array}\right]}\) \(\newcommand{\laspan}[1]{\text{Span}\{#1\}}\) \(\newcommand{\bcal}{\cal B}\) \(\newcommand{\ccal}{\cal C}\) \(\newcommand{\scal}{\cal S}\) \(\newcommand{\wcal}{\cal W}\) \(\newcommand{\ecal}{\cal E}\) \(\newcommand{\coords}[2]{\left\{#1\right\}_{#2}}\) \(\newcommand{\gray}[1]{\color{gray}{#1}}\) \(\newcommand{\lgray}[1]{\color{lightgray}{#1}}\) \(\newcommand{\rank}{\operatorname{rank}}\) \(\newcommand{\row}{\text{Row}}\) \(\newcommand{\col}{\text{Col}}\) \(\renewcommand{\row}{\text{Row}}\) \(\newcommand{\nul}{\text{Nul}}\) \(\newcommand{\var}{\text{Var}}\) \(\newcommand{\corr}{\text{corr}}\) \(\newcommand{\len}[1]{\left|#1\right|}\) \(\newcommand{\bbar}{\overline{\bvec}}\) \(\newcommand{\bhat}{\widehat{\bvec}}\) \(\newcommand{\bperp}{\bvec^\perp}\) \(\newcommand{\xhat}{\widehat{\xvec}}\) \(\newcommand{\vhat}{\widehat{\vvec}}\) \(\newcommand{\uhat}{\widehat{\uvec}}\) \(\newcommand{\what}{\widehat{\wvec}}\) \(\newcommand{\Sighat}{\widehat{\Sigma}}\) \(\newcommand{\lt}{<}\) \(\newcommand{\gt}{>}\) \(\newcommand{\amp}{&}\) \(\definecolor{fillinmathshade}{gray}{0.9}\)Below are some quiz questions and suggested projects based on this chapter.
Questions
Below are some quiz questions based on this chapter.
1) Explain the difference between the following two instructions:
1. mov rdx, qword [qVar1]
2. mov rdx, qVar1
2) What is the address mode of the source operand for each of the instructions listed below. Respond with Register, Immediate, Memory, or Illegal Instruction.
Note,
mov <dest>, <source>
mov ebx, 14
mov ecx, dword [rbx]
mov byte [rbx+4], 10
mov 10, rcx
mov dl, ah
mov ax, word [rsi+4]
mov cx, word [rbx+rsi]
mov ax, byte [rbx]
3) Given the following variable declarations and code fragment:
ans1 dd 7
mov rax, 3
mov rbx, ans1
add eax, dword [rbx]
What would be in the eax register after execution? Show answer in hex, full register size.
4) Given the following variable declarations and code fragment:
list1 dd 2, 3, 4, 5, 6, 7
mov rbx, list1
add rbx, 4
mov eax, dword [rbx]
mov edx, dword [list1]
What would be in the eax and edx registers after execution? Show answer in hex, full register size.
5) Given the following variable declarations and code fragment:
lst dd 2, 3, 5, 7, 9
mov rsi, 4
mov eax, 1
mov rcx, 2
lp: add eax, dword [lst+rsi]
add rsi, 4
loop lp
mov ebx, dword [lst]
What would be in the eax, ebx, rcx, and rsi registers after execution? Show answer in hex, full register size. Note, pay close attention to the register sizes (32-bit vs. 64-bit).
6) Given the following variable declarations and code fragment:
list dd 8, 6, 4, 2, 1, 0
mov rbx, list
mov rsi, 1
mov rcx, 3
mov edx, dword [rbx]
lp: add eax, dword [list+rsi*4]
inc rsi
loop lp
imu1 dword [list]
What would be in the eax, edx, rcx, and rsi registers after execution? Show answer in hex, full register size. Note, pay close attention to the register sizes (32-bit vs. 64-bit).
7) Given the following variable declarations and code fragment:
list dd 8, 7, 6, 5, 4, 3, 2, 1, 0
mov rbx, list
mov rsi, 0
mov rcx, 3
mov edx, dword [rbx]
lp: add eax, dword [list+rsi*4]
inc rsi
loop lp
cdq
idiv dword [list]
What would be in the eax, edx, rcx, and rsi registers after execution? Show answer in hex, full register size. Note, pay close attention to the register sizes (32-bit vs. 64-bit).
8) Given the following variable declarations and code fragment:
list dd 2, 7, 4, 5, 6, 3
mov rbx, list
mov rsi, 1
mov rcx, 2
mov eax, 0
mov edx, dword [rbx+4]
lp: add eax, dword [rbx+rsi*4]
add rsi, 2
loop lp
imu1 dword [rbx]
What would be in the eax, edx, rcx, and rsi registers after execution? Show answer in hex, full register size. Note, pay close attention to the register sizes (32-bit vs. 64-bit).
Suggested Projects
Below are some suggested projects based on this chapter.
1) Implement the example program to sum a list of numbers. Use the debugger to execute the program and display the final results. Create a debugger input file to show the results.
2) Update the example program from the previous question to find the maximum, minimum, and average for the list of numbers. Use the debugger to execute the program and display the final results. Create a debugger input file to show the results.
3) Implement the example program to compute the lateral total surface area (including the base) and volume of each square pyramid in a set of square pyramids. Once the values are computed, the program finds the minimum, maximum, sum, and average for the total surface areas and volumes. Use the debugger to execute the program and display the final results. Create a debugger input file to show the results.
4) Write an assembly language program to find the minimum, middle value, maximum, sum, and integer average of a list of numbers. Additionally, the program should also find the sum, count, and integer average for the negative numbers. The program should also find the sum, count, and integer average for the numbers that are evenly divisible by 3. Unlike the median, the 'middle value' does not require the numbers to be sorted. Note, for an odd number of items, the middle value is defined as the middle value. For an even number of values, it is the integer average of the two middle values. Assume all data is unsigned. Use the debugger to execute the program and display the final results. Create a debugger input file to show the results.
5) Repeat the previous program using signed values and signed operations. Use the debugger to execute the program and display the final results. Create a debugger input file to show the results.
6) Create a program to sort a list of numbers. Use the following bubble sort38
algorithm:
for ( i = (len-1) to 0 ) {
swapped = false
for ( j = 0 to i-1 )
if ( lst(j) > lst(j+1) ) {
tmp = lst(j)
lst(j) = lst(j+1)
lst(j+1) = tmp
swapped = true
}
if ( swapped = false ) exit
}
Use the debugger to execute the program and display the final results. Create a debugger input file to show the results.