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Diffstat (limited to 'gmp-6.3.0/tests/mpf/t-trunc.c')
| -rw-r--r-- | gmp-6.3.0/tests/mpf/t-trunc.c | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/gmp-6.3.0/tests/mpf/t-trunc.c b/gmp-6.3.0/tests/mpf/t-trunc.c new file mode 100644 index 0000000..6543a1e --- /dev/null +++ b/gmp-6.3.0/tests/mpf/t-trunc.c @@ -0,0 +1,270 @@ +/* Test mpf_trunc, mpf_ceil, mpf_floor. + +Copyright 2001, 2002, 2020 Free Software Foundation, Inc. + +This file is part of the GNU MP Library test suite. + +The GNU MP Library test suite is free software; you can redistribute it +and/or modify it under the terms of the GNU General Public License as +published by the Free Software Foundation; either version 3 of the License, +or (at your option) any later version. + +The GNU MP Library test suite 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 General +Public License for more details. + +You should have received a copy of the GNU General Public License along with +the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */ + +#include <stdio.h> +#include <stdlib.h> +#include "gmp-impl.h" +#include "tests.h" + + +void +check_print (mpf_srcptr src, mpf_srcptr got, mpf_srcptr want) +{ + mp_trace_base = 16; + mpf_trace ("src ", src); + mpf_trace ("got ", got); + mpf_trace ("want", want); + + printf ("got size=%d exp=%ld\n", SIZ(got), EXP(got)); + mpn_trace (" limbs=", PTR(got), (mp_size_t) ABSIZ(got)); + + printf ("want size=%d exp=%ld\n", SIZ(want), EXP(want)); + mpn_trace (" limbs=", PTR(want), (mp_size_t) ABSIZ(want)); +} + +void +check_one (mpf_srcptr src, mpf_srcptr trunc, mpf_srcptr ceil, mpf_srcptr floor) +{ + mpf_t got; + + mpf_init2 (got, mpf_get_prec (trunc)); + ASSERT_ALWAYS (PREC(got) == PREC(trunc)); + ASSERT_ALWAYS (PREC(got) == PREC(ceil)); + ASSERT_ALWAYS (PREC(got) == PREC(floor)); + +#define CHECK_SEP(name, fun, want) \ + mpf_set_ui (got, 54321L); /* initial junk */ \ + fun (got, src); \ + MPF_CHECK_FORMAT (got); \ + if (mpf_cmp (got, want) != 0) \ + { \ + printf ("%s wrong\n", name); \ + check_print (src, got, want); \ + abort (); \ + } + + CHECK_SEP ("mpf_trunc", mpf_trunc, trunc); + CHECK_SEP ("mpf_ceil", mpf_ceil, ceil); + CHECK_SEP ("mpf_floor", mpf_floor, floor); + +#define CHECK_INPLACE(name, fun, want) \ + mpf_set (got, src); \ + fun (got, got); \ + MPF_CHECK_FORMAT (got); \ + if (mpf_cmp (got, want) != 0) \ + { \ + printf ("%s wrong\n", name); \ + check_print (src, got, want); \ + abort (); \ + } + + CHECK_INPLACE ("mpf_trunc", mpf_trunc, trunc); + + /* Can't do these unconditionally in case truncation by mpf_set strips + some low non-zero limbs which would have rounded the result. */ + if (mpf_size (src) <= PREC(trunc)+1) + { + CHECK_INPLACE ("mpf_ceil", mpf_ceil, ceil); + CHECK_INPLACE ("mpf_floor", mpf_floor, floor); + } + + mpf_clear (got); +} + +void +check_all (mpf_ptr src, mpf_ptr trunc, mpf_ptr ceil, mpf_ptr floor) +{ + /* some of these values are generated with direct field assignments */ + MPF_CHECK_FORMAT (src); + MPF_CHECK_FORMAT (trunc); + MPF_CHECK_FORMAT (ceil); + MPF_CHECK_FORMAT (floor); + + check_one (src, trunc, ceil, floor); + + mpf_neg (src, src); + mpf_neg (trunc, trunc); + mpf_neg (ceil, ceil); + mpf_neg (floor, floor); + check_one (src, trunc, floor, ceil); +} + +void +check_various (void) +{ + mpf_t src, trunc, ceil, floor; + int n, i; + + mpf_init2 (src, 512L); + mpf_init2 (trunc, 256L); + mpf_init2 (ceil, 256L); + mpf_init2 (floor, 256L); + + /* 0 */ + mpf_set_ui (src, 0L); + mpf_set_ui (trunc, 0L); + mpf_set_ui (ceil, 0L); + mpf_set_ui (floor, 0L); + check_all (src, trunc, ceil, floor); + + /* 1 */ + mpf_set_ui (src, 1L); + mpf_set_ui (trunc, 1L); + mpf_set_ui (ceil, 1L); + mpf_set_ui (floor, 1L); + check_all (src, trunc, ceil, floor); + + /* 2^1024 */ + mpf_set_ui (src, 1L); + mpf_mul_2exp (src, src, 1024L); + mpf_set (trunc, src); + mpf_set (ceil, src); + mpf_set (floor, src); + check_all (src, trunc, ceil, floor); + + /* 1/2^1024, fraction only */ + mpf_set_ui (src, 1L); + mpf_div_2exp (src, src, 1024L); + mpf_set_si (trunc, 0L); + mpf_set_si (ceil, 1L); + mpf_set_si (floor, 0L); + check_all (src, trunc, ceil, floor); + + /* 1/2 */ + mpf_set_ui (src, 1L); + mpf_div_2exp (src, src, 1L); + mpf_set_si (trunc, 0L); + mpf_set_si (ceil, 1L); + mpf_set_si (floor, 0L); + check_all (src, trunc, ceil, floor); + + /* 123+1/2^64 */ + mpf_set_ui (src, 1L); + mpf_div_2exp (src, src, 64L); + mpf_add_ui (src, src, 123L); + mpf_set_si (trunc, 123L); + mpf_set_si (ceil, 124L); + mpf_set_si (floor, 123L); + check_all (src, trunc, ceil, floor); + + /* integer of full prec+1 limbs, unchanged */ + n = PREC(trunc)+1; + ASSERT_ALWAYS (n <= PREC(src)+1); + EXP(src) = n; + SIZ(src) = n; + for (i = 0; i < SIZ(src); i++) + PTR(src)[i] = i+100; + mpf_set (trunc, src); + mpf_set (ceil, src); + mpf_set (floor, src); + check_all (src, trunc, ceil, floor); + + /* full prec+1 limbs, 1 trimmed for integer */ + n = PREC(trunc)+1; + ASSERT_ALWAYS (n <= PREC(src)+1); + EXP(src) = n-1; + SIZ(src) = n; + for (i = 0; i < SIZ(src); i++) + PTR(src)[i] = i+200; + EXP(trunc) = n-1; + SIZ(trunc) = n-1; + for (i = 0; i < SIZ(trunc); i++) + PTR(trunc)[i] = i+201; + mpf_set (floor, trunc); + mpf_add_ui (ceil, trunc, 1L); + check_all (src, trunc, ceil, floor); + + /* prec+3 limbs, 2 trimmed for size */ + n = PREC(trunc)+3; + ASSERT_ALWAYS (n <= PREC(src)+1); + EXP(src) = n; + SIZ(src) = n; + for (i = 0; i < SIZ(src); i++) + PTR(src)[i] = i+300; + EXP(trunc) = n; + SIZ(trunc) = n-2; + for (i = 0; i < SIZ(trunc); i++) + PTR(trunc)[i] = i+302; + mpf_set (floor, trunc); + mpf_set (ceil, trunc); + PTR(ceil)[0]++; + check_all (src, trunc, ceil, floor); + + /* prec+4 limbs, 2 trimmed for size, 1 trimmed for integer */ + n = PREC(trunc)+4; + ASSERT_ALWAYS (n <= PREC(src)+1); + EXP(src) = n-1; + SIZ(src) = n; + for (i = 0; i < SIZ(src); i++) + PTR(src)[i] = i+400; + EXP(trunc) = n-1; + SIZ(trunc) = n-3; + for (i = 0; i < SIZ(trunc); i++) + PTR(trunc)[i] = i+403; + mpf_set (floor, trunc); + mpf_set (ceil, trunc); + PTR(ceil)[0]++; + check_all (src, trunc, ceil, floor); + + /* F.F, carry out of ceil */ + EXP(src) = 1; + SIZ(src) = 2; + PTR(src)[0] = GMP_NUMB_MAX; + PTR(src)[1] = GMP_NUMB_MAX; + EXP(trunc) = 1; + SIZ(trunc) = 1; + PTR(trunc)[0] = GMP_NUMB_MAX; + mpf_set (floor, trunc); + EXP(ceil) = 2; + SIZ(ceil) = 1; + PTR(ceil)[0] = 1; + check_all (src, trunc, ceil, floor); + + /* FF.F, carry out of ceil */ + EXP(src) = 2; + SIZ(src) = 3; + PTR(src)[0] = GMP_NUMB_MAX; + PTR(src)[1] = GMP_NUMB_MAX; + PTR(src)[2] = GMP_NUMB_MAX; + EXP(trunc) = 2; + SIZ(trunc) = 2; + PTR(trunc)[0] = GMP_NUMB_MAX; + PTR(trunc)[1] = GMP_NUMB_MAX; + mpf_set (floor, trunc); + EXP(ceil) = 3; + SIZ(ceil) = 1; + PTR(ceil)[0] = 1; + check_all (src, trunc, ceil, floor); + + mpf_clear (src); + mpf_clear (trunc); + mpf_clear (ceil); + mpf_clear (floor); +} + +int +main (void) +{ + tests_start (); + + check_various (); + + tests_end (); + exit (0); +} |