Compiler Design

Question

1 .Which of these is not a part of Synthesis phase .Please states the reason also Along with your answer.
(A)   Obtain machine code corresponding to the mnemonic from the Mnemonics table
(B)   Obtain address of a memory operand from the symbol table
(C)    Perform LC processing
(D)  Synthesize a machine instruction or the machine form of a constant

2 . What is Mnemonics Table and LC processing and what is the use of both of them ?

Answer 1

Mnemonics Table  is works during synthesis phases of a compiler. It mainly process ADD , SUB  instruction like MUX

LC processing is location counter that holds first address of a instruction

There are two phases ,how the assembler works

(i) Analysis phase and (ii) Synthesis phase

In analysis phase we create symbol table and mnemonic table

In synthesis phase we process the instruction by those tables

So, (A) and (B) both in synthesis phase

(C) It is in analysis phase

(D) Synthesis machine instruction is also in synthesis phase

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