Explain pass-1 algorithm of passes used in two-pass-assemble, Computer Engineering

Assignment Help:

Explain pass-1 algorithm of passes used in two-pass assembler?

Pass I:

(i) Separate the symbol, operand fields and mnemonic opcode

(ii) Make the symbol table

(iii) Perform the LC processing

(iv) Constructs intermediate representation.

Pass I uses the subsequent data structures:

OPTAB: A table of associated information and mnemonic opcodes

SYMTAB: It is a symbol table

LITTAB: A table literally utilized in the program

OPTAB consists of the field mnemonic opcode, information and class. The class field shows whether the opcode corresponds to a declaration statement (DL) an imperative statement (IS) or an assembler directive (AD).

SYMTAB entry consists of the fields address and length.

A LITTAB entry consists of literals and address.


Related Discussions:- Explain pass-1 algorithm of passes used in two-pass-assemble

Balanced trees and their operations, what is ment by avl tree n insertion n...

what is ment by avl tree n insertion n deletion ,2-3 tress insertion n deletion

Evaluation functions for cutoff search , Evaluation Functions for Cutoff Se...

Evaluation Functions for Cutoff Search - artificial intelligent Evaluation functions guess the score that may be guaranteed if a specific world state is reached. In chess, such

Editor - tools necessary for assembly language programming, Q. Editor - Too...

Q. Editor - Tools necessary for assembly language programming? The editor is a program which allows the user to enter and modify as well as store a group of instructions or tex

Fixed arithmetic pipelines, Fixed Arithmetic pipelines  We obtain the e...

Fixed Arithmetic pipelines  We obtain the example of multiplication of fixed numbers. The Two fixed-point numbers are added by the ALU using shift and add operations. This sequ

Where signalling transfer point exist, Signalling transfer point (STP) exis...

Signalling transfer point (STP) exist in (A) Strowger exchange                  (B)  SS7 (C)  Local area network                 (D)  PABX Ans: STP that is stand f

Basic working of network layer, Q. Basic working of Network layer? Net...

Q. Basic working of Network layer? Network layer: Network layer is responsible for routing a packet within the subnet that is, from source to destination nodes across numerou

Callable modules of program code within one abap/4 program, How can we crea...

How can we create callable modules of program code within one ABAP/4 program? We can create callable modules by two techniques:- By defining Macros. By creating incl

Mathcad solution to compute the ellipsoid radii , Question: Write a Mat...

Question: Write a MathCad solution to compute the ellipsoid radii at a point. Use the defining parameters for the GRS80 ellipsoid - a and f - in table 19.1. Program Equation 19

Which important terminal required between dte and pstn, An important termin...

An important terminal that is required between DTE and PSTN is (A)  Server                                      (B) MODEM (C)  Relay

Fully parallel associative processor (fpap), Fully Parallel Associative Pro...

Fully Parallel Associative Processor (FPAP):  This processor accepts the bit parallel memory organisation. FPAP has two type of this associative processor named as: Word Org

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