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 - ZX.c (source / functions) Coverage Total Hit Test: PARI/GP v2.19.0 lcov report (development 31092-e6893b0017) Lines: 91.2 % 814 742 Test Date: 2026-08-12 17:02:34 Functions: 92.5 % 107 99 Legend: Lines:     hit not hit

Function Name	Hit count
FqM_mul_Kronecker	81851
Kronecker_to_ZXQX	24269
Kronecker_to_ZXX	1782719
QXQM_mul	5124
QXQM_sqr	7
QXQX_QXQ_mul	3465
QXQX_mul	13377
QXQX_powers	476
QXQX_sqr	1904
QX_ZX_rem	1902140
QX_mul	3814405
QX_sqr	110793
RgXX_to_Kronecker	6756499
RgXX_to_Kronecker_spec	10024501
RgXX_to_Kronecker_var	3164
RgX_check_QX	369824
RgX_check_ZX	2979561
RgX_check_ZXX	1022
Xpm1_powu	434
ZC_mod2BIL_FqC	305402
ZC_mod2BIL_ZXQC	14896
ZM_mod2BIL_FqM	81851
ZM_mod2BIL_ZXQM	6769
ZXC_eval2BIL	1092747
ZXC_expi	1092747
ZXM_eval2BIL	177100
ZXM_expi	177100
ZXQM_mul	6629
ZXQM_sqr	140
ZXQX_ZXQ_mul	8988
ZXQX_mul	22365
ZXQX_sqr	1904
ZXT_remi2n	45162
ZXV_ZX_fromdigits	0
ZXV_Z_mul	7476
ZXV_dotproduct	74242
ZXV_equal	28
ZXV_remi2n	0
ZXX_Z_add_shallow	0
ZXX_Z_divexact	56469
ZXX_Z_mul	8883
ZXX_evalx0	7877
ZXX_max_lg	5598
ZXX_mul_Kronecker	3053260
ZXX_renormalize	317521444
ZXX_shifti	826
ZXX_sqr_Kronecker	5306
ZX_Z_add	87232
ZX_Z_add_shallow	95014
ZX_Z_divexact	5147402
ZX_Z_eval	524920
ZX_Z_mul	15034064
ZX_Z_sub	161616
ZX_Z_translate	4000581
ZX_Z_translate_basecase	3906799
ZX_add	39097665
ZX_affine	690891
ZX_copy	5943361
ZX_deriv	7945141
ZX_digits	518
ZX_div_by_X_1	21
ZX_divuexact	977809
ZX_equal	2582285
ZX_eval1	4732
ZX_eval2BIL	5557926
ZX_eval2BILspec	95737860
ZX_expi	5557926
ZX_expispec	172436806
ZX_max_lg	109373
ZX_mod_Xnm1	1737297
ZX_mul	115759822
ZX_mulspec	124216702
ZX_mulspec_mulii	38194869
ZX_mulu	17045
ZX_neg	599480
ZX_rem	11658559
ZX_remi2n	105566
ZX_rescale	36305
ZX_rescale2n	0
ZX_rescale_lt	0
ZX_shifti	6526856
ZX_sqr	139302313
ZX_sqrspec	139302313
ZX_sqrspec_basecase	76698946
ZX_sqrspec_basecase_limb	316754782
ZX_sqrspec_sqri	18043351
ZX_sub	29585519
ZX_val	346901
ZX_valrem	31526463
ZX_valspec	336989351
ZXn_mul	2600127
ZXn_sqr	1575
Z_XpN_powu	0
Z_ZX_mulshiftspec	48372050
Z_ZX_sub	2740748
Z_mod2BIL_Fq	1199133
Z_mod2BIL_ZX	57502691
Z_mod2BIL_ZXQ	65338
Z_sqrshiftspec_ZX	43740566
_ZX_add	0
_ZX_divrem	735
_ZX_mul	0
_ZX_sqr	266
scalar_ZX	55393
scalar_ZX_shallow	22897
zx_to_ZX	20923
zx_z_divexact	112

Generated by: LCOV version 2.0-1