for PPC, I guess sizeof is returning 16 for alignment reasons

With PPC, it actually uses the 16 bytes (in the form of 2 8-byte doubles).
There are other processors that use 12 bytes but assign 16 bytes (for alignment purposes, as you said).

Cheers,
Rob

In reply to Re^4: powerpc double-double arithmetic by syphilis
in thread powerpc double-double arithmetic by syphilis

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