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+--- Thread: [Free42] DSE bug (/thread-8804.html)
[Free42] DSE bug - Werner - 08-09-2017 08:50 PM
Hello Thomas,
1e19
DSE ST X
skips and adds 8 instead of subtracting 1 (and not skipping).
I use that all the time as a shortcut for 1 -. Old habits die hard.
Up till 1e18 it's ok, 1e19 and up is wrong.
Cheers, Werner
(latest version 2.0.5. Of course)
RE: [Free42] DSE bug - Dieter - 08-09-2017 09:00 PM
(08-09-2017 08:50 PM)Werner Wrote: 1e19
DSE ST X
skips and adds 8 instead of subtracting 1 (and not skipping).
(...)
(latest version 2.0.5. Of course)
FWIW: my Free42 Decimal version 1.5.5 from 2014 behaves the same.
Dieter
RE: [Free42] DSE bug - Thomas Okken - 08-10-2017 01:52 AM
(08-09-2017 08:50 PM)Werner Wrote: Hello Thomas,
1e19
DSE ST X
skips and adds 8 instead of subtracting 1 (and not skipping).
I use that all the time as a shortcut for 1 -. Old habits die hard.
Up till 1e18 it's ok, 1e19 and up is wrong.
Cheers, Werner
(latest version 2.0.5. Of course)
The DSE and ISG code uses a 64-bit integer while breaking up the control variable into its components. That works fine in Free42 Binary, but can fail in Decimal, since the Decimal versions (both BCD20- and Intel-based) can represent integers that don't fit in 64 bits.
I'll fix this in 2.0.6.
I guess I should also take a look at the other functions that break up numbers in this manner, like HMS+. Seems unlikely to cause problems in practice, but a bug is a bug is a bug!
RE: [Free42] DSE bug - Thomas Okken - 08-13-2017 03:40 AM
I fixed ISG and DSE in the Decimal versions.
→HMS, →HR, HMS+, and HMS- didn't have this 64-bit int issue, so those are unchanged.
RE: [Free42] DSE bug - Werner - 08-13-2017 07:55 AM
Thanks, Thomas!
Werner