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: 2026-04-21 09:26:02 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	244389
submulzu2n	262549
addmulzu2n	271563
Babai_heuristic	288770
mulshift	317610
dpe_addmuluz	342907
absrsmall2	401466
dpe_submuluz	412418
rotateG	443224
ZM_is_knapsack	606377
ZM_flatter_rank	624834
fplll_flatter	625795
ZM_flatter	626848
dperotate	652350
addmuliu642n	668118
u64toineg	668118
submuliu642n	683445
absrsmall	696466
lll_trivial	771774
dpe_muluz	799876
get_gramschmidt	1099266
realdotproduct	1183370
ZM_is_lower	1205482
lll	1243427
drop	1346973
flat	1346973
potential	1346973
sizered	1346973
affii_or_copy_gc	1390416
dpe_abssmall	1390430
submulshift	1499787
fplll_dpe	1603902
dpe_addz	1943123
vectail_inplace	2090871
fplll_fast	2104431
lll_finish	2165032
dbldotsquare	2482382
gramschmidt_dynprec	2693943
affdbldpe	3207804
cget_dpemat	3207805
addmuliu2n	4084700
mpabscmp	4096076
submuliu2n	4171424
ZM_is_upper	4236620
addmulziu	4580781
Babai_dpe	4656218
GS_extraprec	4727071
condition_bound	4727071
ZM2_lll_norms	4848195
gsisinv	5195253
dpe_cmpmul	5264520
dpe_cmp	5264523
lllfp	5371124
spread	5852531
submulziu	5923371
ZM_lll_norms	7137849
nbits2prec64	7492251
cget_dblmat	8417712
addmuliu64_inplace	9567280
submuliu64_inplace	9625761
pari_rint	10767512
rotateG_fast	11514666
update_alpha	11958084
cget_dpevec	13301209
dpe_divz	14078143
dpe_abscmp	14518618
setG2_fast	16982399
addzi	17783453
subzi	18524894
u64toi	19876486
affidpe	20756377
setG_fast	22612165
set_line	24883344
affdpe	25732795
Babai_fast	30139330
rotate	31868572
dblrotate	34543924
cget_dblvec	34994742
dpe_normalize	48110871
dpe_submulz	51701819
dpe_subz	53732891
dpe_mulz	56966166
dpe_normalize0	108569548
dbldotproduct	118005303
itodbl_exp	162239296

Generated by: LCOV version 1.16