[fpc-devel] (patch) optimized 32 to 64 bits multiplication for i386

[Sergei Gorelkin]

Hello,

The attached patch implements i386-specific codegeneration for 32 -> 64 
bits multiplications, approximately as described in "FPC HowToDo" wiki page.
I also copied the generic part from tcgaddnode into 
ti386addnode.second_mul, so that all multiplications are handled in a 
single procedure. Although there was no absolute need to do that, it 
makes the code easier to understand.

Regards,
Sergei
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