I am sorry about that. I have pasted the code i am trying out but i know it has a major flaw in it. Especially when i decalre $length_buffer, what i really want to say is that my $length_buffer is 32bytes wide i.e it can hold 256 bits. Anytime i read out an instrution address such as 

0x405d75  
0x4035f7  
0x4035f8  
0x4035fb

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i compute its length and diplay it in bytes so i could use it for comparing the length of the address and the buffer in bytes. the source from where i picked up using the pragma Use bytes is below. (http://perlmeme.org/howtos/using_perl/length.html) 

#!user/bin/perl
#use strict;
#use warnings;
use bytes;

$length_buffer= length(0x100) ;                                       
+             #buffer length
print "$length_buffer, \n";
$base=length(0x00);                                                   
+              #base address
print "$base, \n";

$base_end= ($base+ $length_buffer-1);                                 
+   #base_end address, here it means it goes from 0 to 255 which is 25
+6 elements in the buffer
print " The end of the buffer=$base_end, \n";                         
+   #just to check if the buffer end prints correctly, in this case it
+s 255


#$temp= 0xFFFFFFE0;
$count_hit=0;                                                         
+   #counter to calculate the number of hits
$count_miss=0;                                                        
+   #counter to calculate number of misses

################## Input and output Files#############################
+#######################################################

open(FILE1," < output_log.txt") or die "can't read the file";         
+   #trace file input
open(FILE2, "> o_hit_miss.txt") or die "can't write into the file";   
+   #output file containing the hit and miss informaiton


######################################################################
+#########################################################

while(<FILE1>){
    
    $inst_addr= $_;                                                  #
+ read the lines and store in in inst_addr
    #print " $inst_addr \n";                                          
+# to check if the inst_addr is being read out correctly from the give
+n file
    
###########################################calcultes the length of the
+ address and prints the same in bytes####################
    if($inst_addr) {
        
        #use bytes;                                               # Pr
+agma to display the string in bytes and not in characters
        
    #$len_ofinstr=length( $inst_addr);                                
+#calculates the length of string in bytes and assigns it to $len_inst
+r
    #print " Length in bytes: ", $len_ofinstr, "\n";                  
+#prints the length in bytes for my understanding

    
    if($len_ofinstr >= $base && $len_ofinstr <=$base_end) {
        
        #print" $hit, \n";
        #print FILE2 $hit. "\n";
        
        #print " The inst fits in the buffer->hit, \n";
        $len_ofinstr+=$len_ofinstr;
        #print "Total number of bytes in the buffer=", $len_ofinstr, "
+\n";
        
        $count_hit=$count_hit+1;
        #print " Number of hits in the buffer= $count_hit", "\n";
        print FILE2 "number of hits in buffer". $count_hit. "\n";
    }
}
    else{
        
        if($len_inst == $length_buffer) {
            
            print " it can not hold anymore, \n";
            $base= $instr_addr & 0xffffffe0;
        }
    }
}

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In reply to Re^4: How to assign a variable its width/vector by samd
in thread How to assign a variable its width/vector by samd

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