Implementing VMX128 AltiVec Variant

[Gordan Bobic]

Ian Lance Taylor wrote:
> Gordan Bobic <gordan@bobich.net> writes:
> 
>> These are the only place I found references to them, apart from the
>> files in the gcc/ada directory:
>>
>> gcc/ada/g-alveop.adb
>> gcc/ada/g-alveop.ads
>> gcc/ada/g-alleve.adb
>> gcc/ada/g-alleve.ads
>>
>> I ignored these - I am making a rash assumption here that these are
>> not too important for a C/C++ only build, but I'd like some
>> confirmation on that. What are the above ada files for?
> 
> I don't know what they are for, but I can confirm that they are
> irrelevant for a C/C++ build.

Just out of interest, I only downloaded the core, gcc and g++ tar balls 
of the source. Why are the above ada files in there if they are 
irrelevant for a C/C++ only build?

>> With the modifications I made, GCC still compiled fine. However,
>> libgcc and libstdc++ DO still get build with the missing instructions
>> (according to objdump -D). Why is that? Is that a consequence of the
>> ADA files? Or something else? Where should I look? Is the it ada files
>> that are the cause of the problem I'm seeing?
> 
> It must be something else.  I'm not sure what, though.  It might be
> something as simple as an instruction built from substrings.  For
> example, search for altivec_vmsumu<VI_char>m in altivec.md.

Hmm, fair point. I'll have a re-check for this. I thought I weeded all 
those out, but I might have missed some.

Thanks.

Gordan