I am using this lex program to analyze the usage of each register, whether they are used as a source, a destination, or used as an indirect addressing, these are my codes, i have to analyze all 12 registers...is there any other efficient way to do these as oppose to declaring 36 variables, and 36 rules? (I am a student).

#include <stdio.h>

int q,w,e,r,t,y,u,i,o,p,a,s = 0;


[push|dec]?+[ ]+(eax|EAX)+[,] q++ ;
[,| ]+(eax|EAX)+[ ]? w++ ;
['[']+(eax|EAX)+[ ]? e++ ;
[push|dec]?+[ ]+(ebx|EBX)+[,] r++ ;
[,| ]+(ebx|EBX)+[ ]? t++ ;
['[']+(ebx|EBX)+[ ]? y++ ;
[push|dec]?+[ ]+(ecx|ECX)+[,] u++ ;
[,| ]+(ecx|ECX)+[ ]? i++ ;
['[']+(ecx|ECX)+[ ]? o++ ;
[push|dec]?+[ ]+(edx|EDX)+[,] p++ ;
[,| ]+(edx|EDX)+[ ]? a++ ;
['[']+(edx|EDX)+[ ]? s++ ;

. ;




yylex() ;

printf("EAX as source: %d\n", q) ;
printf("EAX as destination: %d\n", w) ;
printf("EAX as indirect address: %d\n", e) ;
printf("EBX as source: %d\n", r) ;
printf("EBX as destination: %d\n", t) ;
printf("EBX as indirect address: %d\n", y) ;
printf("ECX as source: %d\n", u) ;
printf("ECX as destination: %d\n", i) ;
printf("ECX as indirect address: %d\n", o) ;
printf("EDX as source: %d\n", p) ;
printf("EDX as destination: %d\n", a) ;
printf("EDX as indirect address: %d\n", s) ;

this is my output:

EAX as source: 56
EAX as destination: 71
EAX as indirect address: 0
EBX as source: 25
EBX as destination: 38
EBX as indirect address: 0
ECX as source: 26
ECX as destination: 30
ECX as indirect address: 0
EDX as source: 30
EDX as destination: 38
EDX as indirect address: 0
ubuntu@ubuntu:~$ ^C

The asm file is located here Click Here

PLease, is there any other efficient way to do this, at this rate, i have to type all 36 rules, and make 36 variables, and printf line...

3 Years
Discussion Span
Last Post by Assembly Guy

I'll bump this question, it's two weeks old and still nobody's replied. You might have more luck posting this question on a forum with more focus on lex :)

This topic has been dead for over six months. Start a new discussion instead.
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