#11005: Update Simon's GP scripts and convert to use via gp2c
-------------------------------------+-------------------------------------
Reporter: cremona | Owner: cremona
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-5.13
Component: elliptic curves | Resolution:
Keywords: simon_two_descent | Merged in:
spkg | Reviewers:
Authors: John Cremona, | Work issues: Update to work with
Martin Raum | Simon's latest scripts
Report Upstream: N/A | Commit:
Branch: | Stopgaps:
Dependencies: #11230, #11234, |
#11130 |
-------------------------------------+-------------------------------------
Description changed by pbruin:
Old description:
> 1. Denis Simon's GP scripts (in data/extcode/pari/simon) need updating.
>
> 2. Using them via gp2c would be more efficient.
>
> The scripts have been combined into one and revised to make the gp2c-
> compliant, and gp2c has been used to make a single C file from them.
> This can be compiled (once, on building Sage) into a shared library file
> which can then be used in a GP session, the result being faster running
> of all the functions.
>
> To implement this we (1) patched the extcode repository (removing the old
> scripts); (2) patched the sage library repository, mainly to adapt the
> interface in elliptic_curves/gp_simon.py but also to correct the doctest
> output (due to the script upgrade giving different generators in some
> cases); (3) patched the build system so that the c file (also now in
> elliptic_curves/) is compiled and the resulting shared library installed
> where it can be loaded.
>
> So there are two patches needed! (Previous versions of this also
> required a new spkg but that was redundant.)
>
> 1. Apply the patch trac_11005-simon-sage-3.patch to the sage library.
> 2. Apply the patch trac_11005-simon-extcode.patch to the extcode
> branch.
>
> Followed by sage -b.
>
> See also #11372 (a bug which might be fixed by this ticket).
New description:
1. Denis Simon's GP scripts (in data/extcode/pari/simon) need updating.
2. Using them via gp2c would be more efficient.
The scripts have been combined into one and revised to make the gp2c-
compliant, and gp2c has been used to make a single C file from them. This
can be compiled (once, on building Sage) into a shared library file which
can then be used in a GP session, the result being faster running of all
the functions.
To implement this we (1) patched the extcode repository (removing the old
scripts); (2) patched the sage library repository, mainly to adapt the
interface in elliptic_curves/gp_simon.py but also to correct the doctest
output (due to the script upgrade giving different generators in some
cases); (3) patched the build system so that the c file (also now in
elliptic_curves/) is compiled and the resulting shared library installed
where it can be loaded.
So there are two patches needed! (Previous versions of this also required
a new spkg but that was redundant.)
1. Apply the patch trac_11005-simon-sage-3.patch to the sage library.
2. Apply the patch trac_11005-simon-extcode.patch to the extcode
branch.
Followed by sage -b.
See #11041 for a list of related bug reports.
--
--
Ticket URL: <http://trac.sagemath.org/ticket/11005#comment:26>
Sage <http://www.sagemath.org>
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