Closed burnsauce closed 2 years ago
What is the use case? Personally I never had much of a desire to use double numbers.
On Fri, 14 Jan 2022 at 08:49, Poindexter Frink @.***> wrote:
Some forths feature double literals via a trailing period, e.g.: 40000. , -1234567.
While double literals themselves are not that big a feature, they require implementation of m*/ to operate. From the standard:
M*/ was once described by Chuck Moore as the most useful arithmetic operator in Forth. It is the main workhorse in most computations involving double-cell numbers.
It's the only operator that multiplies with a double as an input.
Should these be added to Durexforth?
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Fixed point math would benefit greatly from M*/
Fixed point math would benefit greatly from M*/
The single-precision divisor limits fractional components to 14-bits, as, say fractional multiply requires f1 * f2 / 1 << fbits
. As we cannot divide by a signed $8000 we must set the fractional component at 14 to divide by $4000.
Therefore, M*/
offers no great automatic advantage in fractional math for multiplication. I will continue to explore this space.
Some forths feature double literals via a trailing period, e.g.:
40000.
,-1234567.
While double literals themselves are not that big a feature, they require implementation of
m*/
to operate. From the standard:It's the only operator that multiplies with a double as an input.
Should these be added to Durexforth?