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:

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 30802-b11b770002) Lines: 1673 1844 90.7 %
Date: 2026-04-11 09:26:21 Functions: 211 231 91.3 %
Legend: Lines: hit not hit

Function Name Sort by function name Hit count Sort by 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_homogenous_derivn 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
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_homogenous_eval 16604
RgX_sqr_FpX 16975
ZXQX_dvd 17720
RgX_homogenize 18102
QXQV_to_mod 22343
RgM_to_RgXX 23714
RgX_affine 30226
RgXY_swapspec 33141
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 52062
RgXn_expint 52920
RgX_integXn 56376
RgX_recip_shallow 59388
RgX_Rg_add_shallow 65086
RgX_rem_FpX 67781
RgXQC_red 68187
_sqr 74805
RgXV_to_RgM 79011
zero_FpX_mod 83272
_pow 88307
RgX_sqrspec_basecase_limb 94825
RgXQ_pow 102160
_ZXQmul 111182
RgXQ_powu 120406
RgXQX_pseudorem 138802
RgX_pseudorem 138802
RgX_RgV_eval 142885
RgXQX_divrem 156752
RgX_mul2n 159564
RgX_mul_QXQX 165568
QXQ_to_mod 168329
ZXQ_powu 168496
Kronecker_to_mod 180561
RgV_to_RgX_reverse 188283
_ZXQsqr 200593
QXQX_to_mod_shallow 204096
RgX_addspec 222463
RgX_Rg_sub 223144
RgX_div_by_X_x 265216
_mul 280959
get_Rg_algebra 294988
RgM_to_RgXV 302956
RgX_rotate_shallow 317037
RgV_to_RgM 336530
RgX_RgXQ_eval 417394
RgX_liftred 444256
RgXQX_red 497492
_gen_cmul 512818
RgX_addmulXn 514933
RgXn_div 562607
RgX_mul_FpX 582113
_add 623235
RgX_homogenous_evalpow 629213
_gen_sqr 635449
RgXn_recip_shallow 645781
ZX_unscale 681402
_red 724098
RgXn_inv 808301
RgX_deriv 831446
QXQ_to_mod_shallow 840695
gen_bkeval 881599
RgX_valrem_inexact 882625
RgX_inflate 885259
RgXn_inv_fast 1005341
RgXn_inv_i 1005341
_one 1019354
_cmul 1040369
rem 1050958
ZX_z_unscale 1179248
RgX_deflate 1187346
Rg_to_RgC 1360199
RgXn_div_fast 1366421
RgXn_div_i 1366421
RgX_sqr 1499118
RgX_sqr_fast 1511270
RgX_shift 1577735
RgX_mulhigh_i2 1801193
RgX_mul_normalized 1821786
Rg_get_0 1862498
_gen_mul 1974339
ZX_unscale2n 1988707
RgXY_degreex 2022605
_gen_nored 2150489
_gen_one 2193292
RgV_to_RgX 2283429
RgXn_div_gen 2371582
RgX_recipspec_shallow 2586560
RgXn_mulhigh 2848403
RgX_mulhigh_i 2904794
RgX_mulXn 2997517
RgX_blocks 3021591
RgX_recip_i 3756394
RgX_val 3984033
RgX_rescale 4352770
Rg_RgX_sub 4886741
RgX_Rg_divexact 5238144
RgX_Rg_translate_basecase 6084975
RgX_Rg_translate_i 6085164
RgX_Rg_translate_fast 6445694
RgX_Rg_translate 6445696
RgX_neg 6522081
RgXn_mul_basecase 7591743
RgX_renormalize_lg 8301660
RgXn_red_shallow 8301966
RgX_addspec_shallow 9061967
RgX_addmulXn_shallow 9743626
RgXn_mul2 10559969
gen_bkeval_powers 12120596
RgXn_mul 12219932
gen_RgXQ_eval_powers 14037253
RgX_divrem 14181721
RgX_rem_fast 14658262
RgX_rem 14658278
RgX_to_RgC 15338902
brent_kung_optpow 19609657
_gen_add 19637444
RgX_divrem_i 23448329
RgX_equal 24796437
RgX_Rg_add 26293531
RgX_Rg_div 29637058
RgX_mul_i 32815118
RgX_mulspec_basecase 33611288
RgX_mulspec 34251920
RgX_coeff_div 36967866
RgX_even_odd 49866199
RgX_sub 69191393
RgX_mul 69243250
RgX_valrem 80780249
RgXspec_kill0 82439150
RgX_mul_fast 84367981
RgX_mulspec_basecase_limb 113557764
RgX_coeff_simplify 113647662
RgX_add 118065957
Rg_get_1 156849065
RgX_shift_shallow 175797338
RgX_Rg_mul 236773371
RgX_coeff_sub 247257640
RgX_coeff_add 441813691
RgX_coeff_mul 728329183

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