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 v2.18.1 lcov report (development 31042-0fbe168e69) Lines: 91.2 % 814 742 Test Date: 2026-07-23 17:04:59 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	1902116
QX_mul	3814399
QX_sqr	110801
RgXX_to_Kronecker	6756499
RgXX_to_Kronecker_spec	10024467
RgXX_to_Kronecker_var	3164
RgX_check_QX	369817
RgX_check_ZX	2979573
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	45702
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	317489367
ZXX_shifti	826
ZXX_sqr_Kronecker	5306
ZX_Z_add	87517
ZX_Z_add_shallow	95029
ZX_Z_divexact	5144942
ZX_Z_eval	524759
ZX_Z_mul	15028901
ZX_Z_sub	161613
ZX_Z_translate	4000691
ZX_Z_translate_basecase	3906911
ZX_add	39084459
ZX_affine	690868
ZX_copy	5943374
ZX_deriv	7945168
ZX_digits	518
ZX_div_by_X_1	21
ZX_divuexact	977809
ZX_equal	2582283
ZX_eval1	4732
ZX_eval2BIL	5557926
ZX_eval2BILspec	95716155
ZX_expi	5557926
ZX_expispec	172409274
ZX_max_lg	109373
ZX_mod_Xnm1	1737297
ZX_mul	115748762
ZX_mulspec	124206429
ZX_mulspec_mulii	38184942
ZX_mulu	17045
ZX_neg	599459
ZX_rem	11658502
ZX_remi2n	106286
ZX_rescale	36311
ZX_rescale2n	0
ZX_rescale_lt	0
ZX_shifti	6526728
ZX_sqr	139291571
ZX_sqrspec	139291571
ZX_sqrspec_basecase	76693119
ZX_sqrspec_basecase_limb	316728913
ZX_sqrspec_sqri	18041500
ZX_sub	29578728
ZX_val	346900
ZX_valrem	31526481
ZX_valspec	336958092
ZXn_mul	2600127
ZXn_sqr	1575
Z_XpN_powu	0
Z_ZX_mulshiftspec	48371748
Z_ZX_sub	2739500
Z_mod2BIL_Fq	1199133
Z_mod2BIL_ZX	57490913
Z_mod2BIL_ZXQ	65338
Z_sqrshiftspec_ZX	43737537
_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