Calculator fail in scientific binary mode with NOT operator

Bug #631402 reported by Paolo Sammicheli on 2010-09-06
This bug affects 3 people
Affects Status Importance Assigned to Milestone
gcalctool (Ubuntu)

Bug Description

Binary package hint: gcalctool
Maverick BETA

Switch to Programming mode, select Binary as base and calculate the following sums. If any of these answers are wrong, report it as a bug in launchpad

   1. NOT 1 = 0
   2. 0 AND 1 = 0
   3. 0 OR 1 = 1

Performing NOT 1 it gives 1111111111111111111111111111111111111111111111111111111111111110 as result.

NOT operator seems to work in some cases:

NOT 1 AND 1 = 0
0 AND NOT 1 = 0

and not in others:

NOT 1 OR 1 = 1111111111111111111111111111111111111111111111111111111111
NOT 0 OR 0 = 1111111111111111111111111111111111111111111111111111111111

description: updated
Angel Abad (angelabad) on 2010-09-06
Changed in gcalctool (Ubuntu):
status: New → Confirmed
Pedro Villavicencio (pedro) wrote :

Thank you for your bug report. This bug has been reported to the developers of the software. You can track it and make comments at:

description: updated
Changed in gcalctool (Ubuntu):
importance: Undecided → Low
status: Confirmed → Triaged
Changed in gcalctool:
status: Unknown → New
Robert Ancell (robert-ancell) wrote :

This is the correct behaviour - the NOT operator flips all the bits in the word - in this case the word size is set to 64 bit in the preferences.

Changed in gcalctool (Ubuntu):
status: Triaged → Invalid
Changed in gcalctool:
status: New → Invalid
Changed in gcalctool:
importance: Unknown → Medium
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