Re: solaris build problem with Sun compilers

Tom Lane wrote:
> Alan Stange <stange(at)rentec(dot)com> writes:
> > I believe the trick here is that Solaris 10 will only run on v9 hardware
> > (or the sun4u systems), which all have the instruction. But the v8 ABI
> > "model" doesn't have it. So, in some sense the ABI doesn't "allow"
> > this instruction, but the hardware does, so they can just slam it in
> > knowing that it'll work.
>
> Well, that might be OK for Sun's compiler since they know what a given
> version of Solaris will run on. But I don't think we can adopt the same
> attitude for our gcc code path; that has to work on Sparc-based Linuxen
> and BSDen. I don't think it's appropriate to kiss off support for v8
> chips when we haven't seen any proof at all of a performance boost in
> return.
>
> Maybe the right answer is to leave the code as-is, ie, deliberately not
> the same for Sun and gcc compilers.

OK, I have applied the following patch which documents that the Solaris
CC TAS ASM only works for sparc9. Hopefully either sparc8 is not needed
(unlikely) or someone will fix it. I have CC'ed the original
contributor who added "cas".

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Bruce Momjian http://candle.pha.pa.us
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