[Asterisk-Users] G.729a beta codec on old Pentiums

[Christopher Lee]

> Okay, doesn't mean so much to me, but it might help someone.

Nor I. I've posted the results to the RT ticket I've already got open with
Digium support in case it helps them as well.

> > (gdb) x/5i $eip
> > 0x4044e862 <lsp_get_quant+210>: fcomi  %st(5),%st
> > 0x4044e864 <lsp_get_quant+212>: jbe    0x4044eb40 <lsp_get_quant+944>
> > 0x4044e86a <lsp_get_quant+218>: fsubr  %st,%st(2)
> > 0x4044e86c <lsp_get_quant+220>: faddp  %st,%st(1)
> > 0x4044e86e <lsp_get_quant+222>: fxch   %st(1)

I'm wondering did this gdb command return the last 5 assembler instructions
to execute before the program crashed?

I did some searching for Pentium x86 instructions, and fcomi, fsubr, faddp,
and fxch are all FPU instructions, so perhaps the module is indeed bombing
out in the old Pentium FPU.

But as above, I really don't know enough about the nitty gritty of GNU
debugger and x86 assembler to fully appreciate what I'm looking at so
perhaps I should leave it to the experts from here :-)

If anyone has the beta G.729a codec successfully running on a Pentium (with
or without MMX) CPU of similar vintage please drop me a line and let me
know, as then I can rule out the machine itself and look harder at figuring
out why my particular Asterisk installation isn't working.

Cheers,
Chris Lee