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

Help with assemly language assignment, Will be needing help with assembly l...

Will be needing help with assembly language assignments over the course of 4 weeks

8086, Ask(2) Write a program to mask bits D3D2D1D0 and to set bits D5D4 and...

Ask(2) Write a program to mask bits D3D2D1D0 and to set bits D5D4 and to invert bits D7D6 of the AX register question #Minimum 100 words accepted#

Rol-logical instruction-microprocessor, ROL : Rotate Left without Carry: T...

ROL : Rotate Left without Carry: This instruction rotates the content of the destination operand to the left by the specified count bit-wise excluding the carry. The most signific

PIC, LIST p=18f4550 #include org 0x0000 movlw 0x00 _________ movlw 0xFF ...

LIST p=18f4550 #include org 0x0000 movlw 0x00 _________ movlw 0xFF movwf PORTB end .

Web services. , describes vertical and horizontal web services protocols. N...

describes vertical and horizontal web services protocols. Next, identify the similarities and differences between vertical and horizontal web services protocols. Finally, explain w

Develop an assembly language program, • To develop an assembly language pro...

• To develop an assembly language program to control a "simulated" intelligent domestic lighting system with the intention of deterring burglary. • To produce a schematic circuit d

Assembly help, use">http://www.raritanval.edu/uploadedFiles/faculty/cs/full...

use">http://www.raritanval.edu/uploadedFiles/faculty/cs/full-time/Brower/CISY256/2013Spring/CISY256%20Assembly%20Project.pdf use microsoft visual 2010 and http://www.asmirvine.c

Interrupt table-how interrupt table processed-microprocessor, Interrupt Tab...

Interrupt Table Each interrupt level has a booked memory location, called an interrupt vector.  All these vectors (or pointers) are stored in the interrupt table. Table lies at

External hardware-interrupts-microprocessor, External Hardware-Interrupts ...

External Hardware-Interrupts External hardware-interrupts are generated by controllers of external devices or coprocessors and are connected to the processor pin for Non Mask a

Addressing mode of 8086-microprocessor, Addressing mode of 8086 : Addre...

Addressing mode of 8086 : Addressing mode specify a way of locating operands or data. Depending on the data types used the memory  addressing  modes and in the instruction  ,

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