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 - base4.c (source / functions) Hit Total Coverage Test: PARI/GP v2.18.1 lcov report (development 30657-d14c2a9e4e) Lines: 1696 1847 91.8 % Date: 2026-01-30 09:23:18 Functions: 170 185 91.9 % Legend: Lines: hit not hit

Function Name	Hit count
Fl_invgen	5900937
Q_nffactor	28482
Q_to_famat	197083
RM_round_maxrank	97991
ZM_famat_limit	568152
ZV_cba	28
ZV_cba_extend	49
Z_cba	757267
Z_cba_rec	6827597
Z_dcba_rec	0
Z_ppgle	0
Z_ppio	986062
Z_ppo	19279415
Z_to_famat	376303
_idealaddtoone	803222
_idealmulred	28605
_idealsqrred	35754
_mul	11384
_sqr	35754
addmul_mat	66516
append	154120
chk_vdir	21
err_divexact	7
ext_inv	20404
ext_mul	60612
ext_pow	0
ext_sqr	33941
factorbackprime	75597
famatV_factorback	13814
famatV_zv_factorback	56273
famat_Z_gcd	0
famat_add	160830
famat_div	200126
famat_div_shallow	10311
famat_idealfactor	0
famat_inv	199371
famat_inv_shallow	26952
famat_makecoprime	2220937
famat_mul	449628
famat_mul_shallow	225064
famat_mulpow_shallow	88321
famat_mulpows_shallow	147670
famat_pow	60642
famat_pow_shallow	62006
famat_pows_shallow	152024
famat_reduce	306365
famat_remove_trivial	67000
famat_sqr	22979
famat_sub	20899
famat_to_Fp_coprime	665
famat_to_nf	0
famat_to_nf_moddivisor	18606
famatsmall_reduce	184684
get_random_a	117742
gpidealfactor	189
gpidealval	7119
hnf_QC_QC	7
hnf_Q_Q	21
hnf_Q_QC	77
hnf_Z_QC	70
hnf_Z_ZC	77
idealHNF_Z_factor	0
idealHNF_Z_factor_i	293982
idealHNF_factor	240105
idealHNF_factor_i	293982
idealHNF_inv	69862
idealHNF_inv_Z	211931
idealHNF_mul	474514
idealHNF_mul_two	975337
idealHNF_norm_pval	4248319
idealHNF_val	4385989
idealadd	83578
idealaddmultoone	35
idealaddtoone	98
idealaddtoone0	70
idealaddtoone_i	17633
idealaddtoone_raw	785591
idealappr	14
idealappr0	14
idealapprfact	0
idealapprfact_i	54082
idealcoprime	84
idealcoprimefact	37189
idealdiv	39744
idealdiv0	56
idealdivexact	5263
idealdivpowprime	13007
idealdown	3031
idealfactor	268277
idealfactor_limit	268704
idealfactor_partial	25515
idealhnf	665
idealhnf0	413
idealhnf_principal	1391718
idealhnf_shallow	1855830
idealhnf_two	802978
idealintersect	21
idealinv	115836
idealismaximal	77
idealismaximal_i	77
idealismaximal_int	42
idealismaximal_mat	21
idealispower	3906
idealmin	7
idealmul	512024
idealmul0	70
idealmul_aux	512024
idealmulelt	266228
idealmulpowprime	828381
idealmulred	17221
idealnorm	105784
idealnumden	389735
idealpow	942613
idealpow0	2499
idealpow_aux	942611
idealpowprime	1309910
idealpowred	80023
idealpows	313347
idealprod	1064
idealprodprime	666
idealprodval	1917
idealpseudomin	142425
idealpseudomin_nonscalar	0
idealpseudominvec	1252980
idealpseudored	1344890
idealred0	138489
idealred_elt	13401
idealredmodpower	59192
idealredmodpower_i	118370
idealsqr	39240
idealsqr_aux	39240
idealsqrprime	317615
idealsqrtn_int	7756
idealtwoelt	97410
idealtwoelt0	2485
idealtwoelt2	42
idealtyp	16545174
idealval	9801743
in_ideal	28
isideal	91
lcmuu	1638942
make_integral	10920
mat_ideal_two_elt	250555
mat_ideal_two_elt2	21
matreduce	63
nfV_eltembed	84
nfV_idealhnf	84
nf_coprime_part	126
nf_get_Gtwist	138495
nf_get_Gtwist1	12667
nf_remove_denom_p	4376567
nf_to_Fp_coprime	119798
nfdivmodpr	0
nfkermodpr	0
nfmulmodpr	7
nfpowmodpr	0
nfsolvemodpr	0
nfweilheight	84
nfweilheight_i	84
not_in_ideal	14
ok_elt	225043
p_makecoprime	94881
prV_e_muls	28504
prV_lcm_capZ	80948
prV_primes	66233
pr_hnf	3801333
pr_inv	17866
pr_inv_p	38327
pr_uniformizer	58379
ramified_root	7749
ramified_root_simple	7
sunits_makecoprime	98
to_Fp_coprime	122255
to_famat	0
to_famat_shallow	2768074
trivial_merge	28
twistG	12709
u_ppo	54297906
vec_mulid	91
vecdiv	903
vecinv	826
vecmul	16029534
vecpow	0
vecsqr	185983
zk_pvalrem	4330770

Generated by: LCOV version 1.16