--- /dev/null
+/* Test mpf_trunc, mpf_ceil, mpf_floor.
+
+Copyright 2001, 2002 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP Library 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.
+
+The GNU MP Library 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 the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "gmp.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 (ABSIZ(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);
+}
projects / msp430-gcc.git / blobdiff