diff options
Diffstat (limited to 'tests/mpcheck-template2.c')
| -rw-r--r-- | tests/mpcheck-template2.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/tests/mpcheck-template2.c b/tests/mpcheck-template2.c index 3539c2d..7a2a8c0 100644 --- a/tests/mpcheck-template2.c +++ b/tests/mpcheck-template2.c @@ -24,10 +24,52 @@ 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) #define CFOO CAT2(CAT2(c,FOO),SUFFIX) #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, mpfr_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; + mpfr_t t; + int inex, ok; + + /* enlarge exponent range to the largest possible */ + mpfr_set_emin (mpfr_get_emin_min ()); + mpfr_set_emax (mpfr_get_emax_max ()); + + mpfr_init2 (t, pp); + MPC_FOO (t, x, MPFR_RNDN); + inex = mpfr_prec_round (t, p, MPFR_RNDN); + /* restore exponent range */ + mpfr_set_emin (saved_emin); + mpfr_set_emax (saved_emax); + inex = mpfr_check_range (t, inex, MPFR_RNDN); + inex = mpfr_subnormalize (t, inex, MPFR_RNDN); + + /* check real parts agree */ + ok = mpfr_agree (z, t, inex); + + if (!ok) + { + mpfr_printf ("Potential bug in mpc_%s for x=(%Re,%Re)\n", BAR, + mpc_realref (x), mpc_imagref (x)); + mpfr_printf (" mpc_%s to precision %lu gives %Re\n", BAR, p, z); + mpfr_printf (" mpc_%s to precision %lu gives %Re\n", BAR, pp, t); + exit (1); + } + + mpfr_clear (t); +} + static void FUN (mpfr_prec_t p, unsigned long n) { @@ -66,6 +108,8 @@ FUN (mpfr_prec_t p, unsigned long n) mpfr_printf (" mpc_%s gives %Re\n", BAR, z); mpfr_printf (" c%s gives %Re\n", BAR, t); } + if (recheck) + CHECK (x, z); errors++; if (err > max_err) { |