"Vadim Mikheev" <vmikheev@sectorbase.com> writes:
> I've asked if anyone can send crc64 impl to me and got only one from
> Nathan Myers. Unfortunately, SWISS-PROT impl assumes that long long
> is 8 bytes - is it portable?
No, it's not. I have written an implementation that uses uint64 if
available (per configure results) otherwise a pair of uint32 registers.
(See pg_crc.h in as-yet-uncommitted patches I posted to pgpatches.)
Interestingly, gcc -O on HP-PA generates essentially the same code
sequence for either the 64- or dual-32-bit versions of the macro...
regards, tom lane
