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 - lll.c (source / functions) Hit Total Coverage Test: PARI/GP v2.18.1 lcov report (development 30824-18397de1d0) Lines: 1336 1642 81.4 % Date: 2026-04-18 09:26:04 Functions: 125 130 96.2 % Legend: Lines: hit not hit

Function Name	Hit count
Babai	0
RgM_flop	0
dbg_flatter	0
dbg_flattergram	0
fplll	0
kerint	28
matkerint0	28
lllgramkerim	35
lllkerim	35
lllgen	42
lllgramgen	42
lllgramkerimgen	42
lllkerimgen	42
kerint0	56
qflllgram	63
incrementalGSgen	168
lllallgen	168
lllgramallgen	168
lllint	183
REDgen	196
do_SWAPgen	196
qflllgram0	245
qflll0	301
pslg	504
ZM_flattergram	961
ZM_flattergram_rank	961
gramschmidt_upper	1336
dpeM_diagonal_shallow	1547
RgM_Cholesky_dynprec	2967
flattergram_i	2967
ZM_to_RM	4244
fplll_heuristic	4244
gc_lll	4833
lllgram	9089
truncexpo	12138
ZC_to_RC	15945
dpetor	23604
RgM_flip	34918
lllgramint	36439
lllall	36699
get_gaussred	44538
RgM_is_square_mat	45828
setG2_heuristic	187610
realsqrdotproduct	197413
setG_heuristic	205626
dpe_negz	244406
submulzu2n	262549
addmulzu2n	271563
Babai_heuristic	288770
mulshift	317610
dpe_addmuluz	342905
absrsmall2	401466
dpe_submuluz	412418
rotateG	443222
ZM_is_knapsack	606737
ZM_flatter_rank	624836
fplll_flatter	625797
ZM_flatter	626850
dperotate	652345
addmuliu642n	668118
u64toineg	668118
submuliu642n	683445
absrsmall	696466
lll_trivial	771773
dpe_muluz	799871
get_gramschmidt	1099257
realdotproduct	1183370
ZM_is_lower	1205477
lll	1243426
potential	1346983
sizered	1346983
drop	1346984
flat	1346984
affii_or_copy_gc	1390402
dpe_abssmall	1390412
submulshift	1499787
fplll_dpe	1603886
dpe_addz	1943106
vectail_inplace	2091223
fplll_fast	2104781
lll_finish	2165389
dbldotsquare	2482587
gramschmidt_dynprec	2693967
cget_dpemat	3207763
affdbldpe	3207767
addmuliu2n	4087543
mpabscmp	4096806
submuliu2n	4173934
ZM_is_upper	4236637
addmulziu	4580717
Babai_dpe	4656280
GS_extraprec	4727168
condition_bound	4727170
ZM2_lll_norms	4847809
gsisinv	5195344
dpe_cmpmul	5264572
dpe_cmp	5264580
lllfp	5371148
spread	5852976
submulziu	5923239
ZM_lll_norms	7137843
nbits2prec64	7492318
cget_dblmat	8419096
addmuliu64_inplace	9567280
submuliu64_inplace	9625761
pari_rint	10770244
rotateG_fast	11518410
update_alpha	11961758
cget_dpevec	13300942
dpe_divz	14078731
dpe_abscmp	14519205
setG2_fast	16988296
addzi	17782904
subzi	18524580
u64toi	19876486
affidpe	20756880
setG_fast	22619573
set_line	24891211
affdpe	25733330
Babai_fast	30148699
rotate	31879715
dblrotate	34555142
cget_dblvec	35001905
dpe_normalize	48113875
dpe_submulz	51704838
dpe_subz	53735812
dpe_mulz	56969212
dpe_normalize0	108576082
dbldotproduct	118041364
itodbl_exp	162315704

Generated by: LCOV version 1.16