On December 30, 2016 4:48:22 PM GMT+01:00, Tom Lane <t...@sss.pgh.pa.us> wrote:
>and got no warnings and the attached output.  I'm not very good at
>PPC assembler, but I think what is happening in the "char" case is that
>gcc is trying to emulate a byte-wide operation using a word-wide one,
>ie an lwarx/stwcx. loop. 

Hm.  This seems to suggest a straight out code generation bug in that compiler, 
not a failure in intrinsic detection.

I'll note that there's certainly ppc64 machine with that intrinsic working 
(tested that on the community hydra during atomics development).  So either 
it's a bug specific to some compiler version,  or 32bit ppc.

I assume there's no trivial way to get a newer compiler on that machine?

Sent from my Android device with K-9 Mail. Please excuse my brevity.

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