Yes, the missing 64-bit conversion is the key problem, I will try removing isync later.
Thanks for your support. 2010/3/26 Segher Boessenkool <seg...@kernel.crashing.org> > > Yes indeed. Could you post the relevant piece if disassembly from > > your original binary (the one that has the problem)? Or send me the > > binary (not to the mailing list), I'll do it then. > > Ah scratch that. I compiled your original code (after fixing the > compile errors -- there is no such type as "bool" in C). > > The problem is that (upper << 32) | lower thing. "upper" is a 32-bit > type, so shifting it by 32 or more bits is undefined. GCC compiles this > to (shortened): > > 0: mftbu 9 ; mftbl 11 ; mftbu 0 ; cmpw 0,9 ; bne 0b # so far so good > slwi 0,0,0 ; or 4,0,11 ; li 3,0 ; blr > > so it shifts by 0, i.e. it does upper | lower . > > Case closed, no hardware problem :-) > > > Segher > >
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