Lpc2000

--- In lpc2000@yahoogroups.com, "Karl Olsen" <kro@p...> wrote:
>
> ---- Original Message ----
> From: "soren_t_hansen" <soren_t_hansen@y...>
> To: <lpc2000@yahoogroups.com>
> Sent: Saturday, December 31, 2005 12:12 PM
> Subject: [lpc2000] Divide by zero
> 
> > What happenes if you make a division by zero on the LPC2132? I suspect
> > that you enter the Undefined Instruction exception handler, but is
> > that correct? I haven't been able to find anything about it in the
> > manual.
> 
> No, the ARM7TDMI does not have a hardware divide instruction, so
divisions
> are purely a software matter.
> 
> With gcc, the compiler calls __divsi3 and __udivsi3 for signed and
unsigned
> integer divisions, and they are implemented in libgcc, a part of
gcc.  If
> you try to divide by zero, they call __div0, and then return 0.  The
default
> implementation of __div0 does nothing.
> 
> Other compilers might handle it differently.
> 
> Karl Olsen
>

I'm using the GNUARM toolchain. Does that mean that a divide by zero
doesn't result in anything?

/Søren