Why does the Keil compiler generate bad code for the DS400C80?

I tried to duplicate the first problem using the following example code and couldn't:

struct info_st
  {
  char *ptr;
  int  number_1;
  long number_2;
  };

char junk[] = "1234567890";

char *check_struct_ptr_inc (struct info_st *p)
{
volatile char c;
c = *p->ptr++;
return (c);
}

void main (void)
{
struct info_st ppp = { junk, 12, 123456789L };
check_struct_ptr_inc (&ppp);
while (1);
}

I tried to duplicate the first problem using the following example code and couldn't:

struct info_st
  {
  char *ptr;
  int  number_1;
  long number_2;
  };

char junk[] = "1234567890";

char *check_struct_ptr_inc (struct info_st *p)
{
volatile char c;
c = *p->ptr++;
return (c);
}

void main (void)
{
struct info_st ppp = { junk, 12, 123456789L };
check_struct_ptr_inc (&ppp);
while (1);
}

I am using version 7.06a (the latest version of the compiler)and a large memory model.

I'll try your test program on Monday, and try to determine what the problem is.

Thanks

Barry

This simple example fails on the DS80C400.

Before call
PPP->PTR X:010676


After call
PPP->PTR X:010777


The compiler does not work for the DS80C400.

Which simple example?

Jon

Your simple example.

Hmmm. It works just fine here. Maybe we have different project options. I'm using LX51 and AX51 with LARGE memory model (variables in XDATA) and 512K contiguous mode.

Jon

Jon,

I am using the same tools for the Dallas 400 chip.

Keil has reproduced both prolems and is working on a fix (I hope).

I have also found another reentrant and &ptr problem. Which I have reported to Keil.

Thanks for the simple example.

Barry

I am using Contiguous Mode: 16MB program, if that matters.

For anyone else with these problems, each has been corrected and added to the knowledgebase. Refer to:

http://www.keil.com/support/docs/2605.htm

and

http://www.keil.com/support/docs/2606.htm

Jon