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) Coverage Total Hit Test: PARI/GP v2.19.0 lcov report (development 31092-e6893b0017) Lines: 81.2 % 1645 1336 Test Date: 2026-10-12 17:03:14 Functions: 96.2 % 131 126 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	968
ZM_flattergram_rank	968
gramschmidt_upper	1402
dpeM_diagonal_shallow	1736
RgM_Cholesky_dynprec	2988
flattergram_i	2988
ZM_to_RM	4706
fplll_heuristic	4706
gc_lll	5460
lllgram	9093
ZC_to_RC	22443
truncexpo	24469
dpetor	26670
RgM_flip	34953
lllgramint	36441
lllall	36701
get_cholesky	44547
RgM_is_square_mat	45834
thsn	92871
setG2_heuristic	195115
realsqrdotproduct	207826
setG_heuristic	217970
Babai_heuristic	302144
dpe_negz	366739
absrsmall2	442325
rotateG	479947
ZM_is_knapsack	607739
ZM_flatter_rank	625252
fplll_flatter	626220
ZM_flatter	627266
dperotate	718524
addmuliu642n	729530
u64toineg	729530
submuliu642n	747684
absrsmall	761889
lll_trivial	771853
mulshift	938305
thre	1033988
get_gramschmidt	1099660
ZM_is_lower	1205625
lll	1244995
realdotproduct	1289785
dpe_addmuluz	1345057
drop	1347830
flat	1347830
potential	1347830
sizered	1347830
dpe_submuluz	1433659
fplll_dpe	1605267
submulshift	2074362
vectail_inplace	2093699
fplll_fast	2107678
lll_finish	2168318
affii_or_copy_gc	2183624
dpe_abssmall	2183624
dbldotsquare	2485090
gramschmidt_dynprec	2695660
affdbldpe	3210534
cget_dpemat	3210534
mpabscmp	4109726
ZM_is_upper	4239649
addmuliu2n	4665670
GS_extraprec	4729251
condition_bound	4729251
submuliu2n	4739439
Babai_dpe	4767851
ZM2_lll_norms	4851224
lllfp	5375744
dpe_cmp	5479941
dpe_cmpmul	5479941
spread	5856110
dpe_addz	6685227
ZM_lll_norms	7144292
nbits2prec64	7496581
cget_dblmat	8430712
dpe_muluz	8704419
addmuliu64_inplace	10613593
submuliu64_inplace	10666126
addmulziu	10826608
pari_rint	11658621
rotateG_fast	11962792
submulziu	12229399
update_alpha	12442739
cget_dpevec	13317699
dpe_divz	15649912
dpe_abscmp	15813587
submulzu2n	16867897
addmulzu2n	17070592
setG2_fast	17618338
u64toi	22027403
affidpe	22440965
setG_fast	23273465
set_line	25553460
Babai_fast	31686892
addzi	32506340
affdpe	33169014
rotate	33264538
subzi	33271522
cget_dblvec	35115028
dblrotate	35888376
dpe_submulz	69699421
dpe_mulz	75179362
dpe_subz	76425226
dpe_normalize	77498827
dbldotproduct	129242186
dpe_normalize0	153391674
itodbl_exp	177119569

Generated by: LCOV version 2.0-1