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) Coverage Total Hit Test: PARI/GP v2.18.1 lcov report (development 31042-0fbe168e69) Lines: 91.8 % 1852 1701 Test Date: 2026-07-23 17:04:59 Functions: 92.0 % 187 172 Legend: Lines:     hit not hit

Function Name	Hit count
Fl_invgen	5916703
Q_nffactor	28532
Q_to_famat	197087
RM_round_maxrank	98530
ZM_famat_limit	568151
ZV_cba	28
ZV_cba_extend	49
Z_cba	757372
Z_cba_rec	6828640
Z_dcba_rec	0
Z_ppgle	0
Z_ppio	986167
Z_ppo	19280526
Z_to_famat	376291
_idealaddtoone	803264
_idealmulred	28605
_idealsqrred	35759
_mul	11384
_sqr	35759
addmul_mat	66489
append	155935
chk_vdir	21
err_divexact	7
ext_inv	20406
ext_mul	61060
ext_pow	0
ext_sqr	33946
factorbackprime	75626
famatV_factorback	13814
famatV_zv_factorback	56273
famat_Z_gcd	0
famat_add	162630
famat_div	200121
famat_div_shallow	10311
famat_idealfactor	0
famat_inv	199357
famat_inv_shallow	26947
famat_makecoprime	2220969
famat_mul	451454
famat_mul_shallow	224916
famat_mulpow_shallow	88348
famat_mulpows_shallow	147672
famat_pow	60642
famat_pow_shallow	62033
famat_pows_shallow	151899
famat_reduce	308206
famat_remove_trivial	67007
famat_sqr	22984
famat_sub	20910
famat_to_Fp_coprime	665
famat_to_nf	0
famat_to_nf_moddivisor	18606
famatsmall_reduce	185896
get_random_a	118265
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	294023
idealHNF_factor	240113
idealHNF_factor_i	294023
idealHNF_inv	69867
idealHNF_inv_Z	212264
idealHNF_mul	474529
idealHNF_mul_two	975295
idealHNF_norm_pval	4247956
idealHNF_val	4385184
idealadd	83578
idealaddmultoone	35
idealaddtoone	98
idealaddtoone0	70
idealaddtoone_i	17633
idealaddtoone_raw	785631
idealappr	14
idealappr0	14
idealapprfact	0
idealapprfact_i	54089
idealcoprime	84
idealcoprimefact	37191
idealdiv	39744
idealdiv0	56
idealdivexact	5263
idealdivpowprime	13007
idealdown	3031
idealfactor	268344
idealfactor_limit	268771
idealfactor_partial	25515
idealfromgens	42
idealhnf	665
idealhnf0	413
idealhnf_principal	1393279
idealhnf_shallow	1857433
idealhnf_two	803578
idealintersect	21
idealinv	115838
idealismaximal	77
idealismaximal_i	77
idealismaximal_int	42
idealismaximal_mat	21
idealispower	3906
idealmin	7
idealmul	512055
idealmul0	70
idealmul_aux	512055
idealmulelt	266228
idealmulpowprime	828262
idealmulred	17221
idealnorm	106058
idealnumden	389759
idealpow	942129
idealpow0	2499
idealpow_aux	942129
idealpowprime	1309347
idealpowred	80386
idealpows	313399
idealprod	1064
idealprodprime	666
idealprodval	1917
idealpseudomin	142667
idealpseudomin_nonscalar	0
idealpseudominvec	1254116
idealpseudored	1346028
idealred0	139178
idealred_elt	13192
idealredmodpower	59192
idealredmodpower_i	118370
idealsqr	39245
idealsqr_aux	39245
idealsqrprime	317554
idealsqrtn_int	7756
idealtwoelt	97948
idealtwoelt0	2485
idealtwoelt2	42
idealtyp	16553902
idealval	9806937
in_ideal	28
isideal	91
lcmuu	1645000
make_integral	10920
mat_ideal_two_elt	251101
mat_ideal_two_elt2	21
matreduce	77
nfV_eltembed	84
nfV_idealhnf	448
nfV_to_ZM	448
nf_coprime_part	126
nf_get_Gtwist	139185
nf_get_Gtwist1	12667
nf_remove_denom_p	4377799
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	226153
p_makecoprime	95069
prV_e_muls	28588
prV_lcm_capZ	81194
prV_primes	66234
pr_hnf	3803297
pr_inv	17863
pr_inv_p	38689
pr_uniformizer	58442
ramified_root	7749
ramified_root_simple	7
sunits_makecoprime	98
to_Fp_coprime	122255
to_famat	0
to_famat_shallow	2769792
trivial_merge	28
twistG	12709
u_ppo	54305725
vec_mulid	455
vecdiv	903
vecinv	826
vecmul	16133722
vecpow	0
vecsqr	185983
zk_pvalrem	4331966

Generated by: LCOV version 2.0-1