The information you need is either in the documentation or a design
decision you're going to have to make.
Gabe
On 03/09/11 21:00, K J wrote:
> Could you please tell me the specific related locations in the source
> code, such as the block “decode OPCODE default Unknown::unknown(){}”
> in src\arch\alpha\isa\decoder.isa? Because I am not familiar with the
> structure of the program. Thank you.
>
> KJ
>
> On Wed, Mar 9, 2011 at 11:01 PM, Gabe Black <[email protected]
> <mailto:[email protected]>> wrote:
>
> The file you'd modify is src/arch/alpha/isa/decoder.isa. The
> syntax for this file is found on the wiki here:
>
> http://www.m5sim.org/wiki/index.php/The_M5_ISA_description_language
>
> When adding a blob for your instruction, you'll probably want to
> put the bits from the actual source and destination registers into
> intermediate arrays so that their components can be manipulated
> individually. Then, once you've computed the output, you'd take
> the value from the intermediate result array and move it into the
> destination register. The way the parser identifies sources and
> destinations is that anything to the left of an equals sign is
> considered a destination, and anything else is considered a
> source. Its easiest to make sure the parser understands what your
> doing even with complex operations like this by using intermediate
> variables and reading and writing what the parser sees as operands
> with nice, clean assignments. This also means you won't really be
> able to use, for instance, memcpy since the destination will be a
> function argument and look like a source even though it's being
> written to.
>
> Gabe
>
>
> On 03/09/11 19:49, K J wrote:
>> Hi All,
>>
>> Could you please tell me if I want to add a special instruction
>> into the Alpha ISA, which files and functions I need to modify?
>> The M5 version is “m5-stable-f299139501f7”. The instruction like
>> an addition of two vectors:
>> VVADD Va, Vb, Vc
>> For (i=0; i<128, i++) {
>> Vc[i]=Va[i]+Vb[i];
>> }
>> Thank you.
>>
>> KJ
>>
>>
>> _______________________________________________
>> m5-users mailing list
>> [email protected] <mailto:[email protected]>
>> http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
>
>
> _______________________________________________
> m5-users mailing list
> [email protected] <mailto:[email protected]>
> http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
>
>
>
> _______________________________________________
> m5-users mailing list
> [email protected]
> http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
_______________________________________________
m5-users mailing list
[email protected]
http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
