static void ternary_test (void) { int prec; int rnd; int inex, expected_inex; mpf_t x; mpfr_t y; mpf_init2 (x, 256); mpfr_init2 (y, 256); for (prec = 2; prec <= 256; prec++) { mpf_set_prec (x, prec); mpfr_set_prec (y, PREC (x) * GMP_NUMB_BITS + 1); /* y == 1 */ mpfr_set_ui_2exp (y, 1, prec, MPFR_RNDN); RND_LOOP (rnd) { inex = mpfr_get_f (x, y, (mpfr_rnd_t) rnd); if (inex != 0 || mpfr_cmp_f (y, x) !=0) { printf ("Error in mpfr_get_f (x, y, %s)\nx = ", mpfr_print_rnd_mode ((mpfr_rnd_t) rnd)); mpf_out_str (stdout, 2, 0, x); printf ("\ny = "); mpfr_dump (y); if (inex != 0) printf ("got ternary value = %+d, expected: 0\n", inex); exit (1); } } /* y == 1 + epsilon */ mpfr_nextbelow (y); RND_LOOP (rnd) { switch (rnd) { case MPFR_RNDU: case MPFR_RNDA: case MPFR_RNDN: expected_inex = +1; break; default : expected_inex = -1; } inex = mpfr_get_f (x, y, (mpfr_rnd_t) rnd); if (! SAME_SIGN (expected_inex, inex) || SAME_SIGN (expected_inex, mpfr_cmp_f (y, x))) { printf ("Error in mpfr_get_f (x, y, %s)\nx = ", mpfr_print_rnd_mode ((mpfr_rnd_t) rnd)); mpf_out_str (stdout, 2, 0, x); printf ("\ny = "); mpfr_dump (y); if (! SAME_SIGN (expected_inex, inex)) printf ("got ternary value = %+d, expected: %+d\n", inex, expected_inex); exit (1); } } /* y == positive random float */ mpfr_random2 (y, MPFR_LIMB_SIZE (y), 1024, RANDS); RND_LOOP (rnd) { inex = mpfr_get_f (x, y, (mpfr_rnd_t) rnd); if (! SAME_SIGN (inex, -mpfr_cmp_f (y, x))) { printf ("Error in mpfr_get_f (x, y, %s)\nx = ", mpfr_print_rnd_mode ((mpfr_rnd_t) rnd)); mpf_out_str (stdout, 2, 0, x); printf ("\ny = "); mpfr_dump (y); printf ("got ternary value = %+d, expected: %+d\n", inex, -mpfr_cmp_f (y, x)); exit (1); } } } mpf_clear (x); mpfr_clear (y); }
int main (void) { mpf_t x; mpfr_t y, z; unsigned long i; mpfr_exp_t e; int inex; tests_start_mpfr (); mpfr_init (y); mpfr_init (z); mpf_init (x); i = 1; while (i) { mpfr_set_ui (y, i, MPFR_RNDN); if (mpfr_get_f (x, y, MPFR_RNDN) != 0 || mpf_cmp_ui (x, i)) { printf ("Error: mpfr_get_f(%lu) fails\n", i); exit (1); } if (i <= - (unsigned long) LONG_MIN) { long j = i < - (unsigned long) LONG_MIN ? - (long) i : LONG_MIN; mpfr_set_si (y, j, MPFR_RNDN); if (mpfr_get_f (x, y, MPFR_RNDN) != 0 || mpf_cmp_si (x, j)) { printf ("Error: mpfr_get_f(-%lu) fails\n", i); exit (1); } } i *= 2; } /* same tests, but with a larger precision for y, which requires to round it */ mpfr_set_prec (y, 100); i = 1; while (i) { mpfr_set_ui (y, i, MPFR_RNDN); inex = mpfr_get_f (x, y, MPFR_RNDN); if (! SAME_SIGN (inex, - mpfr_cmp_f (y, x)) || mpf_cmp_ui (x, i)) { printf ("Error: mpfr_get_f(%lu) fails\n", i); exit (1); } mpfr_set_si (y, (signed long) -i, MPFR_RNDN); inex = mpfr_get_f (x, y, MPFR_RNDN); if (! SAME_SIGN (inex, - mpfr_cmp_f (y, x)) || mpf_cmp_si (x, (signed long) -i)) { printf ("Error: mpfr_get_f(-%lu) fails\n", i); exit (1); } i *= 2; } /* bug reported by Jim White */ for (e = 0; e <= 2 * GMP_NUMB_BITS; e++) { /* test with 2^(-e) */ mpfr_set_ui (y, 1, MPFR_RNDN); mpfr_div_2exp (y, y, e, MPFR_RNDN); inex = mpfr_get_f (x, y, MPFR_RNDN); mpf_mul_2exp (x, x, e); if (inex != 0 || mpf_cmp_ui (x, 1) != 0) { printf ("Error: mpfr_get_f(x,y,MPFR_RNDN) fails\n"); printf ("y="); mpfr_dump (y); printf ("x="); mpf_div_2exp (x, x, e); mpf_out_str (stdout, 2, 0, x); exit (1); } /* test with 2^(e) */ mpfr_set_ui (y, 1, MPFR_RNDN); mpfr_mul_2exp (y, y, e, MPFR_RNDN); inex = mpfr_get_f (x, y, MPFR_RNDN); mpf_div_2exp (x, x, e); if (inex != 0 || mpf_cmp_ui (x, 1) != 0) { printf ("Error: mpfr_get_f(x,y,MPFR_RNDN) fails\n"); printf ("y="); mpfr_dump (y); printf ("x="); mpf_mul_2exp (x, x, e); mpf_out_str (stdout, 2, 0, x); exit (1); } } /* Bug reported by Yury Lukach on 2006-04-05 */ mpfr_set_prec (y, 32); mpfr_set_prec (z, 32); mpf_set_prec (x, 32); mpfr_set_ui_2exp (y, 0xc1234567, -30, MPFR_RNDN); mpfr_get_f (x, y, MPFR_RNDN); inex = mpfr_set_f (z, x, MPFR_RNDN); if (inex != 0 || ! mpfr_equal_p (y, z)) { printf ("Error in mpfr_get_f:\n inex = %d, y = ", inex); mpfr_dump (z); printf ("Expected:\n inex = 0, y = "); mpfr_dump (y); exit (1); } mpfr_clear (y); mpfr_clear (z); mpf_clear (x); special_test (); prec_test (); ternary_test (); tests_end_mpfr (); return 0; }
int main (void) { mpfr_t x, u; mpf_t y, z; mpfr_exp_t emax; unsigned long k, pr; int r, inexact; tests_start_mpfr (); mpf_init (y); mpf_init (z); mpf_set_d (y, 0.0); /* check prototype of mpfr_init_set_f */ mpfr_init_set_f (x, y, MPFR_RNDN); mpfr_set_prec (x, 100); mpfr_set_f (x, y, MPFR_RNDN); mpf_urandomb (y, RANDS, 10 * GMP_NUMB_BITS); mpfr_set_f (x, y, RND_RAND ()); /* bug found by Jean-Pierre Merlet */ mpfr_set_prec (x, 256); mpf_set_prec (y, 256); mpfr_init2 (u, 256); mpfr_set_str (u, "7.f10872b020c49ba5e353f7ced916872b020c49ba5e353f7ced916872b020c498@2", 16, MPFR_RNDN); mpf_set_str (y, "2033033E-3", 10); /* avoid 2033.033 which is locale-sensitive */ mpfr_set_f (x, y, MPFR_RNDN); if (mpfr_cmp (x, u)) { printf ("mpfr_set_f failed for y=2033033E-3\n"); exit (1); } mpf_set_str (y, "-2033033E-3", 10); /* avoid -2033.033 which is locale-sensitive */ mpfr_set_f (x, y, MPFR_RNDN); mpfr_neg (u, u, MPFR_RNDN); if (mpfr_cmp (x, u)) { printf ("mpfr_set_f failed for y=-2033033E-3\n"); exit (1); } mpf_set_prec (y, 300); mpf_set_str (y, "1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111", -2); mpf_mul_2exp (y, y, 600); mpfr_set_prec (x, 300); mpfr_set_f (x, y, MPFR_RNDN); if (mpfr_check (x) == 0) { printf ("Error in mpfr_set_f: corrupted result\n"); mpfr_dump (x); exit (1); } MPFR_ASSERTN(mpfr_cmp_ui_2exp (x, 1, 901) == 0); /* random values */ for (k = 1; k <= 1000; k++) { pr = 2 + (randlimb () & 255); mpf_set_prec (z, pr); mpf_urandomb (z, RANDS, z->_mp_prec); mpfr_set_prec (u, ((pr / GMP_NUMB_BITS + 1) * GMP_NUMB_BITS)); mpfr_set_f (u, z, MPFR_RNDN); if (mpfr_cmp_f (u , z) != 0) { printf ("Error in mpfr_set_f:\n"); printf ("mpf (precision=%lu)=", pr); mpf_out_str (stdout, 16, 0, z); printf ("\nmpfr(precision=%lu)=", ((pr / GMP_NUMB_BITS + 1) * GMP_NUMB_BITS)); mpfr_out_str (stdout, 16, 0, u, MPFR_RNDN); putchar ('\n'); exit (1); } mpfr_set_prec (x, pr); mpfr_set_f (x, z, MPFR_RNDN); mpfr_sub (u, u, x, MPFR_RNDN); mpfr_abs (u, u, MPFR_RNDN); if (mpfr_cmp_ui_2exp (u, 1, -pr - 1) > 0) { printf ("Error in mpfr_set_f: precision=%lu\n", pr); printf ("mpf ="); mpf_out_str (stdout, 16, 0, z); printf ("\nmpfr="); mpfr_out_str (stdout, 16, 0, x, MPFR_RNDN); putchar ('\n'); exit (1); } } /* Check for +0 */ mpfr_set_prec (x, 53); mpf_set_prec (y, 53); mpf_set_ui (y, 0); for (r = 0 ; r < MPFR_RND_MAX ; r++) { int i; for (i = -1; i <= 1; i++) { if (i) mpfr_set_si (x, i, MPFR_RNDN); inexact = mpfr_set_f (x, y, (mpfr_rnd_t) r); if (!MPFR_IS_ZERO(x) || !MPFR_IS_POS(x) || inexact) { printf ("mpfr_set_f(x,0) failed for %s, i = %d\n", mpfr_print_rnd_mode ((mpfr_rnd_t) r), i); exit (1); } } } /* coverage test */ mpf_set_prec (y, 2); mpfr_set_prec (x, 3 * mp_bits_per_limb); mpf_set_ui (y, 1); for (r = 0; r < mp_bits_per_limb; r++) { mpfr_urandomb (x, RANDS); /* to fill low limbs with random data */ inexact = mpfr_set_f (x, y, MPFR_RNDN); MPFR_ASSERTN(inexact == 0 && mpfr_cmp_ui_2exp (x, 1, r) == 0); mpf_mul_2exp (y, y, 1); } mpf_set_ui (y, 1); mpf_mul_2exp (y, y, ULONG_MAX); mpfr_set_f (x, y, MPFR_RNDN); mpfr_set_ui (u, 1, MPFR_RNDN); mpfr_mul_2ui (u, u, ULONG_MAX, MPFR_RNDN); if (!mpfr_equal_p (x, u)) { printf ("Error: mpfr_set_f (x, y, MPFR_RNDN) for y = 2^ULONG_MAX\n"); exit (1); } emax = mpfr_get_emax (); /* For mpf_mul_2exp, emax must fit in an unsigned long! */ if (emax >= 0 && emax <= ULONG_MAX) { mpf_set_ui (y, 1); mpf_mul_2exp (y, y, emax); mpfr_set_f (x, y, MPFR_RNDN); mpfr_set_ui_2exp (u, 1, emax, MPFR_RNDN); if (!mpfr_equal_p (x, u)) { printf ("Error: mpfr_set_f (x, y, MPFR_RNDN) for y = 2^emax\n"); exit (1); } } /* For mpf_mul_2exp, emax - 1 must fit in an unsigned long! */ if (emax >= 1 && emax - 1 <= ULONG_MAX) { mpf_set_ui (y, 1); mpf_mul_2exp (y, y, emax - 1); mpfr_set_f (x, y, MPFR_RNDN); mpfr_set_ui_2exp (u, 1, emax - 1, MPFR_RNDN); if (!mpfr_equal_p (x, u)) { printf ("Error: mpfr_set_f (x, y, MPFR_RNDN) for y = 2^(emax-1)\n"); exit (1); } } mpfr_clear (x); mpfr_clear (u); mpf_clear (y); mpf_clear (z); tests_end_mpfr (); return 0; }