Lpc2000

You're absolutely right...thanks Karl!

Clearly my constructors aren't doing any comparisons that set the zero
flag (since this works for me)

per Karl's comment, the comparison of r5 to zero should be done again
after the constructor returns and before the bne... and then there are
probably more elegant solutions.

--- In lpc2000@yahoogroups.com, "Karl Olsen" <kro@p...> wrote:
> --- In lpc2000@yahoogroups.com, "dave_albert" <david_albert@h...> 
> wrote:
> > Here's a snippet of code I use to call C++ constructors in crt0.S
> > I call it after clearing .bss and initializing .data:
> > 
> > 
> >      /* Call global C++ object constructors */
> > 
> >      ldr     r4, =__CTOR_LIST__      @ Null terminated list of ctors
> > Ctor_Loop:      
> >      ldr     r5, [r4], #+4           @ Fetch constructor address
> >      cmp     r5, #0                  @ Test for end of list
> >      addne   lr, pc, #4              @ Save return address
> >      movne   pc, r5                  @ Call constructor
> >      bne     Ctor_Loop               @ Continue for all constructors
> > 
> 
> Won't the called constructor likely modify the zero flag so that 
> the "bne Ctor_Loop" might terminate the loop prematurely?
> 
> Karl Olsen