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 - rootpol.c (source / functions) Hit Total Coverage Test: PARI/GP v2.18.1 lcov report (development 30764-6b81f1f3fa) Lines: 1467 1530 95.9 % Date: 2026-03-23 09:27:26 Functions: 116 119 97.5 % Legend: Lines: hit not hit

Function Name	Hit count
FFT	56
FFT_i	98
FFTinv	56
QX_complex_roots	296304
RgX_gtofp_bit	7047875
RgX_normalize1	35703
X2XP1	5990874
ZX_Uspensky	1313816
ZX_Uspensky_equal	28
ZX_Uspensky_equal_yes	14
ZX_Uspensky_no	21
ZX_deg1root	15203
ZX_graeffe	5439
ZX_realroots_irred	48572
ZX_rescale2prim	2233935
ZX_sturm	6395
ZX_sturm_i	123071
ZX_sturm_irred	116676
ZX_sturmpart	1128218
ZX_to_ZiX	16493294
ZiX_sqr	99236930
_gen_nored	11210367
_gen_one	14475926
_gen_zero	326012
_intervalcmp	0
_mp_add	24665184
_mp_cmul	34781456
_mp_mul	4374670
_mp_sqr	6298424
_mp_sub	0
_sqrtnr	22594
a_posteriori_errors	537464
abs_update	8021201
abs_update_r	780113
all_roots	536362
append_clone	1616150
bkeval_single_power	5236402
check_ab	1178846
checkbound	2354822
checkvalidpol	267212
clean_roots	536409
cleanroots	231763
cmp_complex_appr	2241441
conformal_basecase	1406463
conformal_mapping	468783
conformal_pol	1406581
dblexp	6562551
dbllog2	304090225
dft	503320
dual_modulus	1014485
eval_rel_pol	13168405
fft	14193793
fft2	7462
findpower	41032128
fix_roots	537462
fix_roots1	398782
fujiwara_bound	2271925
fujiwara_bound_real	1406886
graeffe	49609840
homothetie	1613551
homothetie2n	9978969
homothetie_gauss	36565775
ind_maxlog2	904356
initdft	998247
isexactpol	240103
isexactscalar	934017
isreal	963711
isvalidcoeff	1230439
logmax_modulus	4458702
logmin_modulus	1617716
logmodulus	608204
logpre_modulus	608199
logradius	494926
lower_bound	41031998
mydbllog2i	226907962
mydbllog2r	57613429
mydbllogr	9565518
mygprec	63865234
mygprec_absolute	4344151
mygprec_special	537471
mygprecrc	215576449
mygprecrc_special	2181389
myshiftic	136143286
myshiftrc	35577085
newton_polygon	5520587
optimize_split	494930
parameters	494929
pol_to_gaussint	17627110
polgraeffe	14
polmod_to_embed	84
polrootsbound	27102
polrootsbound_i	27095
polsolve	166705
quicktofp	6981329
realroots	50627
refine_F	503315
refine_H	2464602
root_error	1914401
roots	8368
roots_aux	240131
roots_com	240103
rootsdeg0	42
scalepol	4297388
scalepol2n	0
sol_ok	3378
solve_exact_pol	231495
split_0	495301
split_0_1	469152
split_0_2	469152
split_1	468782
split_2	494927
split_complete	1528069
split_fromU	494929
split_pols	166698
splitcauchy	166716
splitpoleval	5236451
tocomplex	1215854
update_radius	494930
usp	1126108

Generated by: LCOV version 1.16