Hi DJ.

> I've added NULL checks in simulators even when the hardware has RAM at
> address zero.  Typically, a command line option and/or gdb command is
> required to enable it, since it usually just gets in the way more
> often than it helps.  I wouldn't want it to be unconditional.

OK - here is a revised v850.igen patch without the trap for executing 
via a NULL pointer.  I'll look at adding that feature back in, 
controlled via a command line option, at some later date.

OK to apply ?

Cheers
   Nick

sim/v850/ChangeLog

2012-09-10  Nick Clifton  <nickc@redhat.com>

	* v850.igen (W,WWWW): Correct computation of register number.
	(JR32): Remove unnecessary comma.
	(cmovf.s): Register 0 is an invalid source register.
	(maddf.s): Remove bogus intermediary rounding.
	(nmaddf.s): Likewise.
	(trncf.sl): Remove bogus initial rounding.
	(trncf.dw): Likewise.
	(trncf.sl): Likewise.
	(trncf.sw): Likewise.