#7949: Bit-shifts in Z/(n)
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Reporter: spancratz | Owner: spancratz
Type: defect | Status: new
Priority: minor | Milestone: sage-4.3.1
Component: basic arithmetic | Keywords: bit shift, integer mod ring
Work_issues: | Author: spancratz
Upstream: N/A | Reviewer:
Merged: |
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Comment(by spancratz):
Looking at the related methods for types ``IntegerMod_int``, note that
{{{
def __rshift__(IntegerMod_int self, int right):
...
return self._new_c(self.ivalue >> right)
}}}
Here, the code ignores right shifts with negative values of ``right``, in
which case one has to take the modulus.
The patch (to be attached) will address this, too.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7949#comment:1>
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