[LLVMdev] Guidance regarding a dummy project

[Richard Gorton]

The documents John mentions are highly useful.  I'm actually doing this 
- and find the source in various other architecture subtrees to be 
invaluable - lib/Target/<target>.  Our machine is a 64-bit RISC machine, 
so reading the PPC/Mips/Sparc code is useful.  For some instructions, 
ARM has been useful (pre/post increment/decrement).

If this is a commercial effort, Synopsys makes a tool called Processor 
Designer which can take you quite a ways to doing this.

Best of Luck,

     Richard Gorton
     www.cog-e.com



On 6/6/2014 10:53 AM, John Criswell wrote:
> Dear Pratik,
>
> What I think you will want to do is to create a new assembler and a 
> new code generator for your architecture.  This, I suspect, means that 
> you'll need to understand how to describe your architecture's 
> instruction set using TableGen, how to create an assembler using the 
> MC interface, and how to build a code generator.
>
> My best suggestion is to start looking at the documentation "Writing 
> an LLVM Backend" and "The LLVM Target-Dependent Code Generator" at 
> http://llvm.org/docs. The "Tablegen" document may also help.  The 
> links for these documents are at:
>
> http://llvm.org/docs/WritingAnLLVMBackend.html
> http://llvm.org/docs/CodeGenerator.html
> http://llvm.org/docs/TableGen/index.html
>
> As I have not written a new code generator from scratch myself, that's 
> about all the help I can offer.  I suggest reading these documents (if 
> you have not already) and then write the list with more specific 
> questions as needed.
>
> Good luck,
>
> John Criswell
>
>
> On 6/4/14, 3:37 AM, pratik dand wrote:
>> Dear,
>>
>> I am looking to build a compiler-assembler with a custom architecture.
>> I have a new Instruction set defined with me and I would like atleast 
>> my C programs to get converted to assembly language corresponding to 
>> the custom architecture.
>>
>> I have been going through llvm and its resources on the web, Can any 
>> one of you offer guidance about the above problem.
>>
>> All I want is to develop a tool which can take in a custom 
>> architecture and assemble all programs corresponding to the architecture.
>>
>> Regards,
>> Pratik
>>
>>
>>
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>
>
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