#468 Subtraction with data in acc error
When doing a 16 bit subtraction where the right side
resides in the accumulator, the high byte is
incorrectly? complimented resulting in the wrong result.
A cut down gzipped .lst file follows compiled with
--i-code-in-asm.
I had to leave all the serial code initialisation and
stuff in there to prevent the compiler from optimising
the problem away.
I also found that something like
void setup_vars(void)
{
i = 64;
j = 3;
}
void main(void)
{
(Other init routines here)
setup_vars
k = (i+20) - (j*5);
}
would not call the setup_vars routine. there was no
trace of it in the .lst file and it just did not work.
Also having a problem with initialised variables.
like
xdata unsigned char IP[4] = { 192,168,1,100 };
it appears to be compiled in, seems to work in the
simulator but on my 89c668 does not write the right
values to ram. doing a manual init byte by byte works
however.
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We can't fix bugs, unless we're able to reproduce them.
Please supply complete, compilable examples (attaching
files doesn't work reliably, but it often works in a second
step!).
Futhermore it would be much easier to process your reports,
if you would file a separate bug report for each problem.
Even if I close this report for now plese feel free to submit new
ones. The bugs seem to be serious and we want to learn
more about them.
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user_id=589052
Hi,
one part of the problem might be missing "()"
and the compiler not complaining about it.
Frieder
This seems OK for me? :
int i,j,k;
void setup_vars(void)
{
i = 64;
j = 3;
}
void main(void)
{
/* (Other init routines here) */
setup_vars(); /* OK? OK! */
setup_vars; /* no warning (and no code either) */
k = (i+20) - (j*5);
}