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 30793-1ceee7ca5f) Lines: 1336 1642 81.4 % Date: 2026-04-10 09:27:03 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
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
dpeM_diagonal_shallow	20140
RgM_flip	34918
lllgramint	36439
lllall	36699
get_gaussred	44539
RgM_is_square_mat	45828
dpetor	93774
setG2_heuristic	187610
realsqrdotproduct	197413
setG_heuristic	205626
dpe_negz	244395
submulzu2n	262549
addmulzu2n	271563
Babai_heuristic	288770
mulshift	317610
dpe_addmuluz	342907
absrsmall2	401466
dpe_submuluz	412418
rotateG	443224
ZM_is_knapsack	606870
ZM_flatter_rank	624856
fplll_flatter	625817
ZM_flatter	626870
dperotate	652350
addmuliu642n	668118
u64toineg	668118
submuliu642n	683445
absrsmall	696466
lll_trivial	771772
dpe_muluz	799876
get_gramschmidt	1099270
realdotproduct	1183370
ZM_is_lower	1205489
lll	1243426
drop	1347073
potential	1347073
sizered	1347073
flat	1347074
affii_or_copy_gc	1390424
dpe_abssmall	1390428
submulshift	1499787
fplll_dpe	1603899
dpe_addz	1943119
vectail_inplace	2091374
fplll_fast	2104928
lll_finish	2165536
dbldotsquare	2482879
gramschmidt_dynprec	2694146
affdbldpe	3207793
cget_dpemat	3207796
addmuliu2n	4087264
mpabscmp	4097253
submuliu2n	4173183
ZM_is_upper	4236829
addmulziu	4580738
Babai_dpe	4656388
condition_bound	4727452
GS_extraprec	4727453
ZM2_lll_norms	4847980
gsisinv	5195611
dpe_cmpmul	5264675
dpe_cmp	5264677
lllfp	5371420
spread	5853386
submulziu	5923356
ZM_lll_norms	7138117
nbits2prec64	7492750
cget_dblmat	8419692
addmuliu64_inplace	9567280
submuliu64_inplace	9625761
pari_rint	10771456
rotateG_fast	11519514
update_alpha	11962857
cget_dpevec	13301488
dpe_divz	14079167
dpe_abscmp	14519605
setG2_fast	16989988
addzi	17783059
subzi	18524733
u64toi	19876486
affidpe	20757641
setG_fast	22622016
set_line	24893420
affdpe	25733737
Babai_fast	30151513
rotate	31883006
dblrotate	34558505
cget_dblvec	35005454
dpe_normalize	48115300
dpe_submulz	51706169
dpe_subz	53737276
dpe_mulz	56970675
dpe_normalize0	108579773
dbldotproduct	118049600
itodbl_exp	162335333

Generated by: LCOV version 1.16