hm....
thanks,
fixed.
it looks like we've faced with some sort of gcc's voodoo -
if(ull > 0xffffffffULL) - does not work, but if(ull > 0x00ffffffffULL) does.
~d
On Sunday 22 December 2002 09:40, Oleg Skydan wrote:
> Hi All,
> I have found a significant BUG in the simulator.
>
> When you use HW multiplyer MAC command, and result exceeds 0xFFFFFFFF
> (e.g. it needs to use __SUMEXT to fit) the __SUMEXT register does not
> updates.
>
> Here is the program:
>
> int x;
> int main()
> {
> asm volatile ("mov #0xFFFF,&__MPY\n"\
> "mov #0xFFFF,&__OP2\n"\
> "mov #0xFFFF,&__MAC\n"\
> "mov #0xFFFF,&__OP2\n"\
> "mov &__SUMEXT,&x\n" : :); //At this point Result=0x1 FFFC 0002, so
> x should be 0x01, but it is 0 !
> //so does __SUMEXT
> }
>
> The IAR C-SPY simulates this program with the correct result.
>
> Thenks,
> Oleg.
>
>
>
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