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 30657-d14c2a9e4e) Lines: 1336 1642 81.4 % Date: 2026-01-29 09:23:20 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
matkerint0	28
lllgramkerim	35
lllkerim	35
kerint	42
lllgen	42
lllgramgen	42
lllgramkerimgen	42
lllkerimgen	42
qflllgram	63
kerint0	70
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	20147
RgM_flip	34918
lllgramint	36439
lllall	36699
get_gaussred	44538
RgM_is_square_mat	45828
dpetor	93802
setG2_heuristic	187610
realsqrdotproduct	197413
setG_heuristic	205626
dpe_negz	244397
submulzu2n	262549
addmulzu2n	271563
Babai_heuristic	288770
mulshift	317717
dpe_addmuluz	342913
absrsmall2	401466
dpe_submuluz	412412
rotateG	443224
ZM_is_knapsack	606289
ZM_flatter_rank	624836
fplll_flatter	625797
ZM_flatter	626850
dperotate	652350
addmuliu642n	668454
u64toineg	668454
submuliu642n	684645
absrsmall	696466
lll_trivial	771701
dpe_muluz	799876
get_gramschmidt	1098839
realdotproduct	1183370
ZM_is_lower	1205112
lll	1243329
drop	1347114
potential	1347114
flat	1347115
sizered	1347115
affii_or_copy_gc	1390418
dpe_abssmall	1390432
submulshift	1501323
fplll_dpe	1603480
dpe_addz	1943126
vectail_inplace	2090305
fplll_fast	2103821
lll_finish	2164436
dbldotsquare	2481112
gramschmidt_dynprec	2694230
affdbldpe	3206954
cget_dpemat	3206957
addmuliu2n	4089942
mpabscmp	4096489
submuliu2n	4182024
ZM_is_upper	4236488
addmulziu	4580816
Babai_dpe	4655116
GS_extraprec	4727757
condition_bound	4727758
ZM2_lll_norms	4848815
gsisinv	5195508
dpe_cmpmul	5263467
dpe_cmp	5263476
lllfp	5371398
spread	5852697
submulziu	5923318
ZM_lll_norms	7137870
nbits2prec64	7492767
cget_dblmat	8415263
addmuliu64_inplace	9572242
submuliu64_inplace	9623289
pari_rint	10767763
rotateG_fast	11515264
update_alpha	11958600
cget_dpevec	13296373
dpe_divz	14076525
dpe_abscmp	14516968
setG2_fast	16984091
addzi	17783294
subzi	18524791
u64toi	19880176
affidpe	20752597
setG_fast	22612333
set_line	24882922
affdpe	25731437
Babai_fast	30141939
rotate	31870094
dblrotate	34545790
cget_dblvec	34983141
dpe_normalize	48111183
dpe_submulz	51703160
dpe_subz	53734292
dpe_mulz	56966496
dpe_normalize0	108568344
dbldotproduct	118037444
itodbl_exp	162360004

Generated by: LCOV version 1.16