Hi!
I am trying to bring interrupt handling routine size down (and speed up)
for mipsel-embedded target.
I need to use inline assembler routines like this one
procedure TSystemCore.setCoreTimerComp(value : longWord); assembler;
nostackframe;
asm
mtc0 $a1,$11,0
end ['a1'];
inside of the interrupt handler, but as soon as I include the call to
this procedure the number of registers that get saved explodes. When I
only need to modify some peripheral I usually get away with only $v0 and
$v1 registers getting saved, but with asm routine included all registers
get saved.
Same is true if I put the asm block directly inside of the interrupt
handler.
As you can see I have added the used registers list for this procedure
so my expectation was that only the register declared does get added to
the list of used registers.
Is this a bug on mips platform or is there in general no way to define
the list of used registers for an assembler routine so that register
allocation works more efficient?
Or is there another way for me to trick freepascal in not saving all
registers?
Thank you,
Michael
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