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 30848-b1463d63da) Lines: 1336 1642 81.4 % Date: 2026-04-30 09:27:33 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	244396
submulzu2n	262549
addmulzu2n	271563
Babai_heuristic	288770
mulshift	317610
dpe_addmuluz	342907
absrsmall2	401466
dpe_submuluz	412418
rotateG	443224
ZM_is_knapsack	606606
ZM_flatter_rank	624836
fplll_flatter	625797
ZM_flatter	626850
dperotate	652350
addmuliu642n	668118
u64toineg	668118
submuliu642n	683445
absrsmall	696466
lll_trivial	771768
dpe_muluz	799876
get_gramschmidt	1099266
realdotproduct	1183370
ZM_is_lower	1205479
lll	1243426
drop	1346984
flat	1346985
potential	1346986
sizered	1346986
affii_or_copy_gc	1390408
dpe_abssmall	1390433
submulshift	1499787
fplll_dpe	1604031
dpe_addz	1943123
vectail_inplace	2091222
fplll_fast	2104783
lll_finish	2165390
dbldotsquare	2482536
gramschmidt_dynprec	2693970
affdbldpe	3208057
cget_dpemat	3208063
addmuliu2n	4085044
mpabscmp	4096767
submuliu2n	4170149
ZM_is_upper	4236780
addmulziu	4580763
Babai_dpe	4656404
GS_extraprec	4727122
condition_bound	4727122
ZM2_lll_norms	4847948
gsisinv	5195300
dpe_cmpmul	5264685
dpe_cmp	5264688
lllfp	5371163
spread	5852802
submulziu	5923382
ZM_lll_norms	7137981
nbits2prec64	7492348
cget_dblmat	8419106
addmuliu64_inplace	9567338
submuliu64_inplace	9625841
pari_rint	10770409
rotateG_fast	11518446
update_alpha	11961807
cget_dpevec	13301515
dpe_divz	14078877
dpe_abscmp	14519290
setG2_fast	16988447
addzi	17783270
subzi	18524907
u64toi	19876624
affidpe	20757260
setG_fast	22619713
set_line	24891419
affdpe	25733588
Babai_fast	30148708
rotate	31879299
dblrotate	34555272
cget_dblvec	35001403
dpe_normalize	48114624
dpe_submulz	51705331
dpe_subz	53736409
dpe_mulz	56969892
dpe_normalize0	108577937
dbldotproduct	118042633
itodbl_exp	162339284

Generated by: LCOV version 1.16