Cmps-string manipulation instruction-microprocessor, Assembly Language

Assignment Help:

CMPS : Compare String Byte or String Word:-The CMPS instruction may be utilized to compare two strings of Words or byte. The length of the string ought to be stored in the CX. If both the word or byte strings are equal, zero flag is set. Flags are affected in the similar way as CMP instruction. The DS: SI and ES: DI point to the 2 strings. The REP instruction prefix is utilized to repeat the operation till register CX (counter) becomes zero or the condition specified by the REP prefix is false.

Following string of instructions describe the instruction. Comparison of the string begin from initial byte / word  of the string, after each comparison the index registers  are updated depending on the direction flag and the counter is decremented. This byte by byte / word by word comparison continues until a mismatch is found. When, a mismatch is found, the carry flag and zero flags are modified properly and the execution proceeds further.

Example :

2388_cmps.jpg

If both strings are fully equal, for example the register CX becomes zero, the ZF is set, or else, ZF is reset.

 


Related Discussions:- Cmps-string manipulation instruction-microprocessor

Al registre, check the al-register for palindromic number

check the al-register for palindromic number

Assignment, 1. Write an assembly program that adds the elements in the odd ...

1. Write an assembly program that adds the elements in the odd indices of the following array. Use LOOP. What is the final value in the register? array1 DWORD 10, 20, 30, 40, 50, 6

Boolean and comparison instructions, what will be the value of EAX after fo...

what will be the value of EAX after following instructions execute? mov bx, 0FFFFh and bx, 6Bh

Assignment, Write an assembly program that adds the elements in the odd ind...

Write an assembly program that adds the elements in the odd indices of the following array. Use LOOP. What is the final value in the register?

Write policy-microprocessor, Write Policy A write policy determines how...

Write Policy A write policy determines how the cache deals with a write cycle. The 2 common write policies areWrite-Throughand Write-Back. In Write-Back policy, the cache behav

Project 1: Text Conversion, I need a text conversion program written in ass...

I need a text conversion program written in assembly language

Write a mips assembly language program, Write a MIPS/SPIM assembly language...

Write a MIPS/SPIM assembly language program that prints the smallest and largest values found in a non-empty table of N word-sized integers. The address of the first entry in your

Dma-how dma works-microprocessor, DMA DMA stands for Direct Memory ...

DMA DMA stands for Direct Memory Access It is uses same Address/Data lines on ISA bus It controls the ISA bus instead of the processor ("bus master") Floppy

Selecting array elements, implement the following c++ code in assembly lang...

implement the following c++ code in assembly language using the block-structured .IF and .while directives

Logical instruction-microprocessor, Logical Instruction : This type of...

Logical Instruction : This type of instructions is utilized for carrying out the bit by bit shift, basic logical operations or rotate. All of the condition code flags are affe

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