stack instructions, Basic Computer Science

Assignment Help:
These instructions permit the use of the stack to store or recover data.
POP
POPF
PUSH
PUSHF

POP INSTRUCTION
Purpose: It improves a portion of information from the stack
POPF INSTRUCTION
Purpose: It extracts the flags stored on the stack
POPF
This command moves bits of the word stored on the superior part of the stack to the flag register.
PUSH INSTRUCTION
Purpose: It puts a word on the stack.
Syntax:
PUSH source
The PUSH instruction reduces by two the value of SP and then transfers the data of the source operator to the new resulting address on the just modified register.
The decrement on the address is due to the fact that when adding values to the stack, this one raises from the greater to the smaller segment address, consequently by subtracting 2 from the SP register what we do is to raise the size of the stack by two bytes, which is the only amount of information the stack can handle on every input and output of information.
PUSHF INSTRUCTION
Purpose: It situates the value of the flags on the stack.
Syntax:
PUSHF
This command reduces by 2 the value of the SP register and then the content of the flag register is relocated to the stack, on the address indicated by SP.
The flags are gone stored in memory on the similar bits indicated on the POPF command.

Related Discussions:- stack instructions

Systems Analysis and Design, Ask question #MiniProfessional and Scientific ...

Ask question #MiniProfessional and Scientific Staff Management (PSSM) is a unique type of temporary staffing agency. Many organizations today hire highly skilled, technical employe

What is Decode or execution cycle?, just the once the instruction has bee...

just the once the instruction has been fetched and is accumulated, the next step is to decode the instruction so as to work out what actions should be performed to execute it. This

Output design, Discuss the factors considered during output design

Discuss the factors considered during output design

Applications software, Applications Software: General aspects on appli...

Applications Software: General aspects on applications software. Applications software is the program that allow the user to get the required work done. In other words, applic

Describe any five requirements of clustering in data mining, Question 1...

Question 1 What is data mining? What are the major issues in data mining? Explain 2 What is meant by data reduction? Explain any three techniques of data reduction 3 Define a b

What is the definition of instructiion set?, For a processor to be able ...

For a processor to be able to process an instruction, it requires to be able to determine what the instruction is asking to be carried out. For this to take place, the CPU requires

Sma* search - artificial intelligence, SMA* Search-Artificial intelligence ...

SMA* Search-Artificial intelligence IDA* search is good from a memory point of view. actually it may  be criticised for not using enough memory - utilizing  more memory may inc

#title, what is HMtl stands for, meaning and purpose

what is HMtl stands for, meaning and purpose

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd