Code coverage tests

This page documents the degree to which the PARI/GP source code is tested by our public test suite, distributed with the source distribution in directory src/test/. This is measured by the gcov utility; we then process gcov output using the lcov frond-end.

We test a few variants depending on Configure flags on the pari.math.u-bordeaux.fr machine (x86_64 architecture), and agregate them in the final report:

• with GMP kernel
• with GMP kernel using --mt=pthread
• with native kernel, including micro-assembler code
• with native kernel, without micro-assembler
• with native kernel, without micro-assembler, disabling GCC extensions (DISABLE_INLINE)
• with GMP kernel, emulating an x86_32 architecture at Configure time via setarch

The target is to exceed 90% coverage for all mathematical modules (given that branches depending on DEBUGLEVEL or DEBUGMEM are not covered). This script is run to produce the results below.

LCOV - code coverage report

Current view: top level - basemath - ellisog.c (source / functions) Coverage Total Hit Test: PARI/GP v2.19.0 lcov report (development 31057-89c4d54ba6) Lines: 98.9 % 1043 1032 Test Date: 2026-07-25 17:02:42 Functions: 100.0 % 89 89 Legend: Lines:     hit not hit

Function Name	Hit count
contrib_full_tors	14
ellnf_prime_degree_hard	42
non_two_torsion_ordinate_char2	49
ellisogenyapply	70
derivhasse	98
ellnf_modpoly	105
ellnf_goodl_l	112
ellnf_isomat	112
ellnf_prime_degree	112
ellnf_prime_degree_easy	112
ellisograph_dummy	154
ellQ_goodl_l	182
isog_identity	252
invisogeny_a4a6	280
isogeny_a4a6	280
corr	336
elkies98	336
isogeny_from_kernel_point	427
divy	476
update_isogeny_polys	532
isomat_perm	539
twistisogeny	616
ellnf_isocrv	644
isomatdbl	714
mkisomatdbl	714
non_two_torsion_abscissa	812
ellisweierstrasspoint	903
ellisogeny	1134
non_two_torsion_ordinate_char_not2	1365
ellcompisog	1379
isog_abscissa	1414
isog_ordinate	1414
ellnfcompisog	1834
get_isog_vars	1876
QXQH_eval	1904
ellisog_by_j	1932
idealgen_minpoly	2016
stariter_hard	2016
ellisog_by_jt	2086
ellisotree	2184
ellweilcurve	2191
path_to_manin	2198
shortest_path	2198
stariter_easy	2240
ellQ_goodl	2492
mkisomat	2534
ellQ_exceptional_iso	2646
ellQ_isomat	2646
list_to_crv	2863
ellisomat	2961
ellisograph_p	3206
fill_LM	3276
ellisograph_r	3472
nfispower_quo	3654
_degree	4116
get_polmodular	4130
ellisograph_a4a6	4193
isomat_find	4340
get_isomat	4382
ellisograph_iso	4571
to_RgX	4760
RgH_eval	5488
distmat_pow	5922
etree_distmat	5922
etree_list	5922
nfmkisomat	5922
ellnf_charpoly	5978
stariter	6048
isograph_p	6482
startor	7994
contrib_weierstrass_pt	8015
RgXY_eval	9660
ellisog_by_roots	10801
ellisog_by_Kohel	10969
trivial_isogeny	11844
to_crv	11949
isogeny_from_kernel_poly	12250
two_torsion_part	12250
first_three_power_sums	12257
make_velu_curve	12621
ellisograph_Kohel_r	14644
a4a6_divpol	15589
ellisograph_Kohel_iso	15589
etree_distmatr	16996
etree_listr	16996
starlaw	18004
isomat_eq	22134
etree_nbnodes	44219
ellmaninconstant	457450

Generated by: LCOV version 2.0-1