local installation

[KlausScheffler]

Hi Darijan

thanks for that very nice and educative compiler. I would like to use your compiler for a home-built cpu (where I can define the machine code on my own via micro code), and the very simple x86-like machine code seems perfect for that. However, I need to modify some constants such as size of stack etc, so I need to toach your code and need to run it locally on my PC. I am not an expert in html and Java, but if I download your code and start ccode.html, it just does not start to compile. Not sure if some files are missing. Actually I dont need the html environment, maybe I just can input a text file (with c code) to your Java compiler.

I would be happy for any help, thanks a lot Klaus

[darijanrijan]

Hi Klaus,

you can't run it so simply. The compiler itself needs to compiled and run as a Java application. You need jlex and java_cup jars to compile .lex and .cup files - you can find the files and tutorial here: http://www.cs.cornell.edu/courses/cs412/2002sp/resources/skeleton.html

I used a tomcat server to tie it all together and run the app, but you can use whatever you want (e.g. Spring, or any other server that can run jars).

[KlausScheffler]

Hi Darijan

thanks, I also realized that all needs to be compiled. Works all fine now, thanks a lot.

[KlausScheffler]

Hi Darijan

sorry, another issue: all stack and memory addresses increase/decrease by 4. Do you assume that each memory location can only hold 8 bits? I am not sure, but if I have a memory that can hold 32 bits then the factor 1 should also work. Similarly, all offsets to base/stackpointer are multiples of 4. Can this be changed to 1? I found a hard-coded "4" in "Codegen" that seems to multiply addresses with 4, can this be set to 1?

Thanks so much for your help Klaus

[UInt2048]

@KlausScheffler The underlying assumption is that memory addresses always refer to a single byte, but this is supposed to be a 32-bit system, so 4 bytes = 32 bits, hence the factor of 4.