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Diffstat (limited to 'tools/mpcheck/mpcheck-template1.c')
| -rw-r--r-- | tools/mpcheck/mpcheck-template1.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/tools/mpcheck/mpcheck-template1.c b/tools/mpcheck/mpcheck-template1.c new file mode 100644 index 0000000..ee56e01 --- /dev/null +++ b/tools/mpcheck/mpcheck-template1.c @@ -0,0 +1,155 @@ +/* template for complex -> complex function, for example acos + +Copyright (C) 2020 INRIA + +This file is part of GNU MPC. + +GNU MPC is free software; you can redistribute it and/or modify it under +the terms of the GNU Lesser General Public License as published by the +Free Software Foundation; either version 3 of the License, or (at your +option) any later version. + +GNU MPC is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for +more details. + +You should have received a copy of the GNU Lesser General Public License +along with this program. If not, see http://www.gnu.org/licenses/ . +*/ + +#define CAT1(X,Y) X ## Y +#define CAT2(X,Y) CAT1(X,Y) +#define STRINGIFY(x) #x +#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, 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, 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 x=(%Re,%Re)\n", BAR, + mpc_realref (x), mpc_imagref (x)); + 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) +{ + unsigned long i = 0; + mpc_t x, z, t; + TYPE complex xx, zz; + int inex, cmp; + unsigned long errors = 0, max_err_re = 0, max_err_im = 0; + /* allow reduced exponent range */ +#if defined(FOO_EMIN) || defined(FOO_EMAX) + mpfr_exp_t saved_emin = emin, saved_emax = emax; + emin = FOO_EMIN; + emax = FOO_EMAX; +#endif + + if (verbose > 0) + printf ("Testing function %s\n", BAR); + + gmp_randseed_ui (state, seed); + + mpc_init2 (x, p); + mpc_init2 (z, p); + mpc_init2 (t, p); + for (i = 0; i < n; i++) + { + mpcheck_random (x); + inex = MPC_FOO (z, x, MPC_RNDNN); + mpfr_subnormalize (mpc_realref (z), MPC_INEX_RE(inex), MPFR_RNDN); + mpfr_subnormalize (mpc_imagref (z), MPC_INEX_IM(inex), MPFR_RNDN); + xx = mpc_get_type (x, MPC_RNDNN); + zz = CFOO (xx); + mpc_set_type (t, zz, MPFR_RNDN); + cmp = mpcheck_mpc_cmp (t, z); + if (cmp != 0) + { + unsigned long err_re = ulp_error (mpc_realref (t), mpc_realref (z)); + unsigned long err_im = ulp_error (mpc_imagref (t), mpc_imagref (z)); + if (verbose > 0 && (err_re > max_err_re || err_im > max_err_im)) + { + mpfr_printf (" mpc_%s and c%s differ by (%lu,%lu) ulp(s)\n for x=(%Re,%Re)\n", + BAR, BAR, err_re, err_im, + mpc_realref (x), mpc_imagref (x)); + mpfr_printf (" mpc_%s gives (%Re,%Re)\n", BAR, + mpc_realref (z), mpc_imagref (z)); + mpfr_printf (" c%s gives (%Re,%Re)\n", BAR, + mpc_realref (t), mpc_imagref (t)); + } + if (recheck) + CHECK (x, z); + errors ++; + if (err_re > max_err_re) + { + max_err_re = err_re; + if (max_err_re > Max_err_re) + Max_err_re = max_err_re; + } + if (err_im > max_err_im) + { + max_err_im = err_im; + if (max_err_im > Max_err_im) + Max_err_im = max_err_im; + } + } + } + mpc_clear (x); + mpc_clear (z); + mpc_clear (t); + printf ("Errors for %s: %lu/%lu (max %lu,%lu) [seed %lu]\n", BAR, + errors, n, max_err_re, max_err_im, seed); +#if defined(FOO_EMIN) || defined(FOO_EMAX) + emin = saved_emin; + emax = saved_emax; +#endif +} + +#undef FOO +#undef CFOO |