Question

Write an assembly language program that evaluates X = (A + B) / (C-D) considering each of the following instruction formats: a) Three-address instruction format b) Two-Address instruction format c) One-address instruction format

Answer 1

The given expression is x = (A + B)/(0-1) @ ALP in three- celéress ins Auction formaat :- One thing to keep in mind that we have to always use. minimum 70.of inslau ction and minimum me of distinget registers while weuiling ALP 3- address instruction formal:- ADD RAB R, MCA] +M[6] , SUB R2, CD DIV X, R1,R2 MEX] £R/R2 J © ALP in Two - address instruction -format: We have to always use minimum no. of ins.buctions and registers. 2- address in sGuction format : MOV R1, these cule the Comments REMI] - MD ADD R., A Mox R2, C SUB R2,D DIY R,,R2 Mov X, Ri - M [0] RERIM[A] REM[C] - R₂L R-M[o] - RC-R/R2 M[X] LR min. no. of © ALP in one-address formal: Always use insbuctions and distinct pegislats - address instuction format LOAD SUB C D STORE Ack M[e] ACE AC-MED] METAL C-D ACL MEA Act ActMEB] Act Ac/MET] MCx] EAC LOAD ADD DIY STORE

Summary - fon 3, address format we or using 3 operands of meinician, Ini address format ve ogue Wing 2 operonds of an instruction and 1 operand in 1-oddress "format ga i odelosess format accumulator is playing a huge Ble. Ac means ricecomulalax.