Re: Overflow Test for M*/

On 7/13/24 02:15, mhx wrote:

On Sat, 13 Jul 2024 2:03:54 +0000, dxf wrote:
 [..]

How many applications have you written requiring a negative divisor?

 I note that in the 68 occurrences of M*/ inside about 1900 files,
32 appear as ".. 1 M*/ ..".
 

The use of 1 M*/ just points to a missing factor of M*/ being omitted from the standard. In kForth, we provide the missing factor:
DS* ( d n -- t )
where t is a signed triple length product. Therefore, 1 M*/ can be replaced by
DS* drop
and the division can be avoided.
If you need an overflow check, it may be a bit more complicated, though.
--
Krishna