Supporting pthreads in libjava on Tru64 UNIX

Fri Jul 11 18:20:00 GMT 2003

Richard Henderson writes:
> On Fri, Jul 04, 2003 at 07:20:55PM +0200, Rainer Orth wrote:
> > " beq %0,3f\n"
> > " mb\n"
> > "2:\n"
> > +# ifdef __ELF__
> > ".section .text2,\"ax\"\n"
> > +# endif
> > "3: br 1b\n"
> > +# ifdef __ELF__
> > ".previous"
> > +# endif
>> With the ifdefing, you've created an infinite loop.

That's what you get for working late at night ;-(
> Just nuke it all and do "beq %0,1b"; ev6 machines
> have much better bracnch prediction and don't care
> so much about forward vs back branches.

I'll leave the forward branch and the section switching stuff inside
__ELF__ to avoid possible performance problems on pre-ev6 systems, as Hans
prefers.
> Alternately, if you're using gas, do ".subsection 1"
> instead of ".section .text2".

Alpha/ECOFF gas doesn't support .subsection (or any other ELF directive),
as far as I can see. Anyway, this will have to work with the native
assembler as well, so this is not an option.
Besides, Alpha/ECOFF gas had serious problems when I tried to use it for
gcc a couple of weeks ago. I'll defer looking into this to some later
time.
	Rainer