Homework Help is Here – Start Your Trial Now!
Engineering
Computer Engineering
What is the value of the stack pointer before the program executes

What is the value of the stack pointer before the program executes

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
See similar textbooks
icon
Related questions
Question

2. What is the address where the ascii string "!= " is stored? 

 

3. What is the value of the stack pointer before the program executes?

.globl main .data input: output: result_str: .text main: exit: .word 6 .word 0 .asciz "! = lw a0, input jal fact_func la t0, output sw a0,0(t0) lw a0, input li a7,1 ecall la a0, result_str li a7,4 ecall lw a0, output li a7,1 ecall li a0, 0 li a7, 93 ecall ebreak addi sp, sp, -8 sw s0, 0(sp) sw ra, 4(sp) mv s0, a0 bgtz a0,$L2 li a0,1 j $L1 addi a0, a0,-1 jal fact_func mul a0, a0, so lw s0, 0(sp) lw ra, 4(sp) addi sp, sp, 8 ret fact_func: $L2: $L1: # The location for the input data # allocates 4 byte set to 4 # The location for the output data # allocates 4 byte set to 4 # The location for the result string data # allocates 1 byte per chacter plus null character # Label for start of program # Load input Value # Load output address to to # Save output value to output memory location # Load Input value into ao # System call code for print_int code 1 # Make system call # Put result_str address in a0 # System call code for print_str code 4 # Make system call # Load output value into a0 # System call code for print_int code 1 # Make system call # Exit (93) with code 0 #System call value. #Make system call # Finish with breakpoint # Make room to save values on the stack # This function uses 1 callee save regs # The return address needs to be saved # Save the argument into so # Branch if n > 0 # Return 1 # Jump to code to return # Compute n - 1 # Call factorial function # Compute fact(n-1) * n # Restore any callee saved regs used # Restore return address # Update stack pointer # Jump to return address
Transcribed Image Text:.globl main .data input: output: result_str: .text main: exit: .word 6 .word 0 .asciz "! = lw a0, input jal fact_func la t0, output sw a0,0(t0) lw a0, input li a7,1 ecall la a0, result_str li a7,4 ecall lw a0, output li a7,1 ecall li a0, 0 li a7, 93 ecall ebreak addi sp, sp, -8 sw s0, 0(sp) sw ra, 4(sp) mv s0, a0 bgtz a0,$L2 li a0,1 j $L1 addi a0, a0,-1 jal fact_func mul a0, a0, so lw s0, 0(sp) lw ra, 4(sp) addi sp, sp, 8 ret fact_func: $L2: $L1: # The location for the input data # allocates 4 byte set to 4 # The location for the output data # allocates 4 byte set to 4 # The location for the result string data # allocates 1 byte per chacter plus null character # Label for start of program # Load input Value # Load output address to to # Save output value to output memory location # Load Input value into ao # System call code for print_int code 1 # Make system call # Put result_str address in a0 # System call code for print_str code 4 # Make system call # Load output value into a0 # System call code for print_int code 1 # Make system call # Exit (93) with code 0 #System call value. #Make system call # Finish with breakpoint # Make room to save values on the stack # This function uses 1 callee save regs # The return address needs to be saved # Save the argument into so # Branch if n > 0 # Return 1 # Jump to code to return # Compute n - 1 # Call factorial function # Compute fact(n-1) * n # Restore any callee saved regs used # Restore return address # Update stack pointer # Jump to return address
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
Computer Networking: A Top-Down Approach (7th Edi…
Computer Networking: A Top-Down Approach (7th Edi…
Computer Engineering
ISBN:
9780133594140
Author:
James Kurose, Keith Ross
Publisher:
PEARSON
Computer Organization and Design MIPS Edition, Fi…
Computer Organization and Design MIPS Edition, Fi…
Computer Engineering
ISBN:
9780124077263
Author:
David A. Patterson, John L. Hennessy
Publisher:
Elsevier Science
Network+ Guide to Networks (MindTap Course List)
Network+ Guide to Networks (MindTap Course List)
Computer Engineering
ISBN:
9781337569330
Author:
Jill West, Tamara Dean, Jean Andrews
Publisher:
Cengage Learning
Concepts of Database Management
Concepts of Database Management
Computer Engineering
ISBN:
9781337093422
Author:
Joy L. Starks, Philip J. Pratt, Mary Z. Last
Publisher:
Cengage Learning
Prelude to Programming
Prelude to Programming
Computer Engineering
ISBN:
9780133750423
Author:
VENIT, Stewart
Publisher:
Pearson Education
Sc Business Data Communications and Networking, T…
Sc Business Data Communications and Networking, T…
Computer Engineering
ISBN:
9781119368830
Author:
FITZGERALD
Publisher:
WILEY
SEE MORE TEXTBOOKS