GCC vs MSVC compiler issues in a port
John Cotton Ericson
Ericson2314@yahoo.com
Fri Jan 18 22:31:00 GMT 2013
After replacing more inline assembly with C/C++ I was indeed able to get
something to render so I could at least visually debug. That means I can
now work backwards: adding blocks of inline assembly back in and
carefully verifying that the gcc inline assembly matches the original
through disassembly.
In addition, I also found some documentation which should help me make
proper run-time tests, as such tests are the only real way to verify the
C/C++ and make sure this works on architectures besides x86-32.
Between those two methods I think I'll be able to smoothly finish this.
Thank you both very much!
On 12/28/2012 06:46 PM, Oleg Endo wrote:
> On Sun, 2012-12-23 at 00:39 -0500, John Cotton Ericson wrote:
>
>> I agree, I tried to make my inline assembly as match the original as
>> much is possible. But you just can't rule it out while it's still there.
> Well, as a first step, I'd replace all inline asm stuff with C/C++
> implementations in the original version using MSVC. Performance might
> become worse than the original, or it might not. Either way, I'd leave
> those optimizations for later. Moreover, it would give you a CPU
> independent version of the code, which is often a good thing :)
>
>> For testing would you recommend something like
>> http://check.sourceforge.net/ ?
> A test_main with a bunch of assert checks should suffice as a start.
>
> Cheers,
> Oleg
>
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