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 30831-19b50a36d0) Lines: 1336 1642 81.4 % Date: 2026-04-22 09:25:48 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	342907
absrsmall2	401466
dpe_submuluz	412418
rotateG	443223
ZM_is_knapsack	606500
ZM_flatter_rank	624840
fplll_flatter	625801
ZM_flatter	626854
dperotate	652348
addmuliu642n	668118
u64toineg	668118
submuliu642n	683445
absrsmall	696466
lll_trivial	771775
dpe_muluz	799876
get_gramschmidt	1099263
realdotproduct	1183370
ZM_is_lower	1205486
lll	1243426
drop	1346985
potential	1346985
sizered	1346985
flat	1346986
affii_or_copy_gc	1390426
dpe_abssmall	1390432
submulshift	1499787
fplll_dpe	1603898
dpe_addz	1943123
vectail_inplace	2090996
fplll_fast	2104547
lll_finish	2165161
dbldotsquare	2482480
gramschmidt_dynprec	2693969
affdbldpe	3207787
cget_dpemat	3207796
addmuliu2n	4082020
mpabscmp	4096425
submuliu2n	4167330
ZM_is_upper	4236646
addmulziu	4580751
Babai_dpe	4656239
GS_extraprec	4727165
condition_bound	4727166
ZM2_lll_norms	4848043
gsisinv	5195338
dpe_cmpmul	5264538
dpe_cmp	5264541
lllfp	5371157
spread	5852734
submulziu	5923367
ZM_lll_norms	7137826
nbits2prec64	7492327
cget_dblmat	8418164
addmuliu64_inplace	9567280
submuliu64_inplace	9625761
pari_rint	10769104
rotateG_fast	11515593
update_alpha	11959089
cget_dpevec	13301136
dpe_divz	14078335
dpe_abscmp	14518784
setG2_fast	16983953
addzi	17783490
subzi	18525092
u64toi	19876486
affidpe	20756578
setG_fast	22614089
set_line	24885398
affdpe	25732970
Babai_fast	30141694
rotate	31871470
dblrotate	34546692
cget_dblvec	34997505
dpe_normalize	48111716
dpe_submulz	51702673
dpe_subz	53733757
dpe_mulz	56967024
dpe_normalize0	108571477
dbldotproduct	118008632
itodbl_exp	162210806

Generated by: LCOV version 1.16