diff options
Diffstat (limited to 'tests/mpcheck-template3.c')
| -rw-r--r-- | tests/mpcheck-template3.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/tests/mpcheck-template3.c b/tests/mpcheck-template3.c index c16d8de..e6718a8 100644 --- a/tests/mpcheck-template3.c +++ b/tests/mpcheck-template3.c @@ -24,12 +24,61 @@ along with this program. If not, see http://www.gnu.org/licenses/ . #define TOSTRING(x) STRINGIFY(x) #define FUN CAT2(test_,FOO) +#define CHECK CAT2(check_,FOO) #define MPC_FOO CAT2(mpc_,FOO) #ifndef CFOO #define CFOO CAT2(CAT2(c,FOO),SUFFIX) #endif #define BAR TOSTRING(FOO) +#define EXTRA 20 + +/* routine to double-check result from MPC with more precision and without + reduced exponent range */ +static void +CHECK (mpc_t x, mpc_t y, mpc_t z) +{ + mpfr_exp_t saved_emin = mpfr_get_emin (); + mpfr_exp_t saved_emax = mpfr_get_emax (); + mpfr_prec_t p = mpfr_get_prec (mpc_realref (x)), pp = p + EXTRA; + mpc_t t; + int ok, inex_re, inex_im; + + /* enlarge exponent range to the largest possible */ + mpfr_set_emin (mpfr_get_emin_min ()); + mpfr_set_emax (mpfr_get_emax_max ()); + + mpc_init2 (t, pp); + MPC_FOO (t, x, y, MPC_RNDNN); + inex_re = mpfr_prec_round (mpc_realref (t), p, MPFR_RNDN); + inex_im = mpfr_prec_round (mpc_imagref (t), p, MPFR_RNDN); + /* restore exponent range */ + mpfr_set_emin (saved_emin); + mpfr_set_emax (saved_emax); + inex_re = mpfr_check_range (mpc_realref (t), inex_re, MPFR_RNDN); + inex_re = mpfr_subnormalize (mpc_realref (t), inex_re, MPFR_RNDN); + inex_im = mpfr_check_range (mpc_imagref (t), inex_im, MPFR_RNDN); + inex_im = mpfr_subnormalize (mpc_imagref (t), inex_im, MPFR_RNDN); + + /* check real parts agree */ + ok = mpfr_agree (mpc_realref (z), mpc_realref (t), inex_re) + && mpfr_agree (mpc_imagref (z), mpc_imagref (t), inex_im); + + if (!ok) + { + mpfr_printf ("Potential bug in mpc_%s for\n", BAR); + mpfr_printf (" x=(%Re,%Re)\n", mpc_realref (x), mpc_imagref (x)); + mpfr_printf (" y=(%Re,%Re)\n", mpc_realref (y), mpc_imagref (y)); + mpfr_printf (" mpc_%s to precision %lu gives (%Re,%Re)\n", BAR, p, + mpc_realref (z), mpc_imagref (z)); + mpfr_printf (" mpc_%s to precision %lu gives (%Re,%Re)\n", BAR, pp, + mpc_realref (t), mpc_imagref (t)); + exit (1); + } + + mpc_clear (t); +} + static void FUN (mpfr_prec_t p, unsigned long n) { @@ -108,6 +157,8 @@ FUN (mpfr_prec_t p, unsigned long n) Max_err_im = max_err_im; } } + if (recheck && cmp != 0) + CHECK (x, y, z); } mpc_clear (x); mpc_clear (y); |