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 - RgX.c (source / functions) Hit Total Coverage Test: PARI/GP v2.18.1 lcov report (development 30831-19b50a36d0) Lines: 1681 1844 91.2 % Date: 2026-04-21 09:26:02 Functions: 212 231 91.8 % Legend: Lines: hit not hit

Function Name	Hit count
RgXQX_mul	0
RgXQX_powers	0
RgXQX_sqr	0
RgXV_prod	0
RgX_RgXQV_eval	0
RgX_RgXn_eval	0
RgX_Rg_eval_bk	0
RgX_Rg_translate_FpX	0
RgX_sqrhigh_i	0
RgX_sqrhigh_i2	0
RgXn_div_FpXQX	0
RgXn_exp	0
RgXn_inv_FpXQX	0
RgXn_powu	0
RgXn_sqr_basecase	0
_RgX_mul	0
_gen_sub	0
_sub	0
_zeroXn	0
RgX_Rg_translate_FpXQX	7
RgXn_sqrt	7
RgXn_sqrhigh	14
RgXQX_RgXQ_mul	35
RgX_rem_FpXQX	70
RgXn_inv_FpX	91
zero_FpXQX_mod	91
RgXn_div_FpX	98
rfrac_deflate	140
rfrac_deflate_max	140
rfrac_deflate_order	140
RgXn_reverse	154
RgXQV_RgXQ_mul	168
RgX_sqr_FpXQX	196
QXY_QXQ_evalx	294
_gen_zero	301
RgXn_sqr2	315
RgXQM_mul	322
RgXX_to_RgM	322
RgXQ_trace	476
RgXnV_red_shallow	483
RgXn_powers	483
RgXV_maxdegree	588
RgX_derivn	798
RgX_RgXnV_eval	966
_zero	1232
RgX_homogenize_deg	1260
ZX_unscale_divpow	1393
RgXQV_red	1449
RgX_mul_FpXQX	1477
QXQX_homogenous_evalpow	1652
_oneXn	1939
RgXY_swap	2051
RgXn_powu_i	2286
RgXV_rescale	2401
RgXQ_norm	2659
RgX_divs	2863
RgXQ_matrix_pow	2933
RgXV_RgV_eval	2947
RgX_digits	3234
QXV_QXQ_eval	3248
do_QXQ_eval	3542
RgX_homogenous_derivn	3773
RgXY_derivx	3836
RgX_muls	3985
_mulXn	4528
RgXn_eval	5593
RgXV_unscale	6489
QXQM_to_mod_shallow	6720
RgXQV_factorback	7118
RgM_to_RgXV_reverse	7202
QX_ZXQV_eval	7455
RgXQ_powers	8603
QXQ_powers	9506
_RgX_divrem	11809
RgX_pseudodivrem	11832
_sqrXn	11893
ZXQ_powers	12061
RgXQX_pseudodivrem	12077
RgXn_sqr	12152
QXQXV_to_mod	12572
ZX_unscale_div	12997
RgXQM_red	13195
RgX_sqr_QXQX	13418
QXQC_to_mod_shallow	14854
RgX_sqr_FpX	16975
ZXQX_dvd	17720
RgX_homogenize	18102
QXQV_to_mod	22344
RgM_to_RgXX	23714
RgX_affine	30226
RgXY_swapspec	33151
RgX_sqr_i	33236
RgX_sqrspec_basecase	33275
RgX_sqrspec	33314
RgXQX_RgXQ_translate	33584
RgX_recip	35301
QXQX_to_mod	37212
RgX_normalize	39711
RgX_splitting	43631
RgX_rem_QXQX	49851
RgX_unscale	52063
RgXn_expint	52917
RgX_integXn	56376
RgX_recip_shallow	59388
RgX_Rg_add_shallow	65090
RgX_rem_FpX	67781
RgXQC_red	68187
RgX_homogenous_eval	70342
_sqr	74805
RgXV_to_RgM	79011
zero_FpX_mod	83272
_pow	88307
RgX_sqrspec_basecase_limb	94825
RgXQ_pow	102160
_ZXQmul	111179
RgXQ_powu	120402
RgXQX_pseudorem	138802
RgX_pseudorem	138802
RgX_RgV_eval	142885
RgXQX_divrem	156752
RgX_mul2n	161412
RgX_mul_QXQX	165568
QXQ_to_mod	168329
ZXQ_powu	168493
Kronecker_to_mod	180561
RgV_to_RgX_reverse	188283
_ZXQsqr	200589
QXQX_to_mod_shallow	204096
RgX_addspec	222463
RgX_Rg_sub	223158
RgX_div_by_X_x	265222
_mul	280969
get_Rg_algebra	295001
RgM_to_RgXV	302952
RgX_rotate_shallow	317037
RgV_to_RgM	336562
RgX_RgXQ_eval	417400
RgX_liftred	444256
RgXQX_red	497492
_gen_cmul	512818
RgX_addmulXn	514933
RgXn_div	562607
RgX_mul_FpX	582113
_add	623251
RgX_homogenous_evalpow	634256
_gen_sqr	635720
RgXn_recip_shallow	649050
ZX_unscale	681444
_red	724131
RgXn_inv	808297
RgX_deriv	832714
QXQ_to_mod_shallow	840695
gen_bkeval	881564
RgX_valrem_inexact	882639
RgX_inflate	885244
RgXn_inv_fast	1005331
RgXn_inv_i	1005331
_one	1019382
_cmul	1040390
rem	1050951
ZX_z_unscale	1179284
RgX_deflate	1187359
Rg_to_RgC	1360405
RgXn_div_fast	1366421
RgXn_div_i	1366421
RgX_sqr	1462990
RgX_sqr_fast	1475142
RgX_shift	1577735
RgX_mulhigh_i2	1801193
RgX_mul_normalized	1821788
Rg_get_0	1862498
_gen_mul	1975411
ZX_unscale2n	1988844
RgXY_degreex	2022736
_gen_nored	2151597
_gen_one	2194203
RgV_to_RgX	2283384
RgXn_div_gen	2371576
RgX_recipspec_shallow	2589736
RgXn_mulhigh	2848403
RgX_mulhigh_i	2904794
RgX_mulXn	2997517
RgX_blocks	3021591
RgX_recip_i	3756307
RgX_val	3984033
RgX_rescale	4352997
Rg_RgX_sub	4886874
RgX_Rg_divexact	5238286
RgX_Rg_translate_basecase	6085291
RgX_Rg_translate_i	6085478
RgX_Rg_translate_fast	6446085
RgX_Rg_translate	6446087
RgX_neg	6522604
RgXn_mul_basecase	7591743
RgX_renormalize_lg	8301659
RgXn_red_shallow	8301967
RgX_addspec_shallow	9062356
RgX_addmulXn_shallow	9744084
RgXn_mul2	10559969
gen_bkeval_powers	12118552
RgXn_mul	12219932
gen_RgXQ_eval_powers	14036409
RgX_divrem	14183949
RgX_rem	14658427
RgX_rem_fast	14658474
RgX_to_RgC	15351073
brent_kung_optpow	19605544
_gen_add	19660125
RgX_divrem_i	23450880
RgX_equal	24796476
RgX_Rg_add	26294834
RgX_Rg_div	29639097
RgX_mul_i	32815436
RgX_mulspec_basecase	33611601
RgX_mulspec	34252222
RgX_coeff_div	36973025
RgX_even_odd	49864423
RgX_sub	69192363
RgX_mul	69282713
RgX_valrem	80783992
RgXspec_kill0	82439744
RgX_mul_fast	84407416
RgX_mulspec_basecase_limb	113559201
RgX_coeff_simplify	113649291
RgX_add	118045547
Rg_get_1	156855507
RgX_shift_shallow	175800474
RgX_Rg_mul	236801025
RgX_coeff_sub	247308092
RgX_coeff_add	441834923
RgX_coeff_mul	728464974

Generated by: LCOV version 1.16