Initial commit.

1 files changed, 217 insertions, 0 deletions

diff --git a/gmp-6.3.0/tests/mpf/t-eq.c b/gmp-6.3.0/tests/mpf/t-eq.c
new file mode 100644
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+++ b/gmp-6.3.0/tests/mpf/t-eq.c
@@ -0,0 +1,217 @@
+/* Test mpf_eq.
+
+Copyright 2009, 2012 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"
+
+#define SZ (2 * sizeof(mp_limb_t))
+
+void insert_random_low_zero_limbs (mpf_t, gmp_randstate_ptr);
+void dump_abort (mpf_t, mpf_t, int, int, int, int, int, long);
+void hexdump (mpf_t);
+
+void
+check_data (void)
+{
+  static const struct
+  {
+    struct {
+      int        exp, size;
+      mp_limb_t  d[10];
+    } x, y;
+    mp_bitcnt_t bits;
+    int want;
+
+  } data[] = {
+    { { 0, 0, { 0 } },             { 0, 0, { 0 } },    0, 1 },
+
+    { { 0, 1, { 7 } },             { 0, 1, { 7 } },    0, 1 },
+    { { 0, 1, { 7 } },             { 0, 1, { 7 } },   17, 1 },
+    { { 0, 1, { 7 } },             { 0, 1, { 7 } }, 4711, 1 },
+
+    { { 0, 1, { 7 } },             { 0, 1, { 6 } },    0, 1 },
+    { { 0, 1, { 7 } },             { 0, 1, { 6 } },    2, 1 },
+    { { 0, 1, { 7 } },             { 0, 1, { 6 } },    3, 0 },
+
+    { { 0, 0, { 0 } },             { 0, 1, { 1 } },    0, 0 },
+    { { 0, 1, { 1 } },             { 0,-1 ,{ 1 } },    0, 0 },
+    { { 1, 1, { 1 } },             { 0, 1, { 1 } },    0, 0 },
+
+    { { 0, 1, { 8 } },             { 0, 1, { 4 } },    0, 0 },
+
+    { { 0, 2, { 0, 3 } },          { 0, 1, { 3 } }, 1000, 1 },
+  };
+
+  mpf_t  x, y;
+  int got, got_swapped;
+  int i;
+  mp_trace_base = 16;
+
+  for (i = 0; i < numberof (data); i++)
+    {
+      PTR(x) = (mp_ptr) data[i].x.d;
+      SIZ(x) = data[i].x.size;
+      EXP(x) = data[i].x.exp;
+      PREC(x) = numberof (data[i].x.d);
+      MPF_CHECK_FORMAT (x);
+
+      PTR(y) = (mp_ptr) data[i].y.d;
+      SIZ(y) = data[i].y.size;
+      EXP(y) = data[i].y.exp;
+      PREC(y) = numberof (data[i].y.d);
+      MPF_CHECK_FORMAT (y);
+
+      got         = mpf_eq (x, y, data[i].bits);
+      got_swapped = mpf_eq (y, x, data[i].bits);
+
+      if (got != got_swapped || got != data[i].want)
+	{
+	  printf ("check_data() wrong result at data[%d]\n", i);
+	  mpf_trace ("x   ", x);
+	  mpf_trace ("y   ", y);
+	  printf ("got         %d\n", got);
+	  printf ("got_swapped %d\n", got_swapped);
+	  printf ("want        %d\n", data[i].want);
+	  abort ();
+        }
+    }
+}
+
+void
+check_random (long reps)
+{
+  unsigned long test;
+  gmp_randstate_ptr rands = RANDS;
+  mpf_t a, b, x;
+  mpz_t ds;
+  int hibits, lshift1, lshift2;
+  int xtra;
+
+#define HIBITS 10
+#define LSHIFT1 10
+#define LSHIFT2 10
+
+  mpf_set_default_prec ((1 << HIBITS) + (1 << LSHIFT1) + (1 << LSHIFT2));
+
+  mpz_init (ds);
+  mpf_inits (a, b, x, NULL);
+
+  for (test = 0; test < reps; test++)
+    {
+      mpz_urandomb (ds, rands, HIBITS);
+      hibits = mpz_get_ui (ds) + 1;
+      mpz_urandomb (ds, rands, hibits);
+      mpz_setbit (ds, hibits  - 1);	/* make sure msb is set */
+      mpf_set_z (a, ds);
+      mpf_set_z (b, ds);
+
+      mpz_urandomb (ds, rands, LSHIFT1);
+      lshift1 = mpz_get_ui (ds);
+      mpf_mul_2exp (a, a, lshift1 + 1);
+      mpf_mul_2exp (b, b, lshift1 + 1);
+      mpf_add_ui (a, a, 1);	/* make a one-bit difference */
+
+      mpz_urandomb (ds, rands, LSHIFT2);
+      lshift2 = mpz_get_ui (ds);
+      mpf_mul_2exp (a, a, lshift2);
+      mpf_mul_2exp (b, b, lshift2);
+      mpz_urandomb (ds, rands, lshift2);
+      mpf_set_z (x, ds);
+      mpf_add (a, a, x);
+      mpf_add (b, b, x);
+
+      insert_random_low_zero_limbs (a, rands);
+      insert_random_low_zero_limbs (b, rands);
+
+      if (mpf_eq (a, b, lshift1 + hibits) == 0 ||
+	  mpf_eq (b, a, lshift1 + hibits) == 0)
+	{
+	  dump_abort (a, b, lshift1 + hibits, lshift1, lshift2, hibits, 1, test);
+	}
+      for (xtra = 1; xtra < 100; xtra++)
+	if (mpf_eq (a, b, lshift1 + hibits + xtra) != 0 ||
+	    mpf_eq (b, a, lshift1 + hibits + xtra) != 0)
+	  {
+	    dump_abort (a, b, lshift1 + hibits + xtra, lshift1, lshift2, hibits, 0, test);
+	  }
+    }
+
+  mpf_clears (a, b, x, NULL);
+  mpz_clear (ds);
+}
+
+void
+insert_random_low_zero_limbs (mpf_t x, gmp_randstate_ptr rands)
+{
+  mp_size_t max = PREC(x) - SIZ(x);
+  mp_size_t s;
+  mpz_t ds; mpz_init (ds);
+  mpz_urandomb (ds, rands, 32);
+  s = mpz_get_ui (ds) % (max + 1);
+  MPN_COPY_DECR (PTR(x) + s, PTR(x), SIZ(x));
+  MPN_ZERO (PTR(x), s);
+  SIZ(x) += s;
+  mpz_clear (ds);
+}
+
+void
+dump_abort (mpf_t a, mpf_t b, int cmp_prec, int lshift1, int lshift2, int hibits, int want, long test)
+{
+  printf ("ERROR in test %ld\n", test);
+  printf ("want %d got %d from mpf_eq\n", want, 1-want);
+  printf ("cmp_prec = %d\n", cmp_prec);
+  printf ("lshift1 = %d\n", lshift1);
+  printf ("lshift2 = %d\n", lshift2);
+  printf ("hibits = %d\n", hibits);
+  hexdump (a); puts ("");
+  hexdump (b); puts ("");
+  abort ();
+}
+
+void
+hexdump (mpf_t x)
+{
+  mp_size_t i;
+  for (i = ABSIZ(x) - 1; i >= 0; i--)
+    {
+      gmp_printf ("%0*MX", SZ, PTR(x)[i]);
+      if (i != 0)
+	printf (" ");
+    }
+}
+
+int
+main (int argc, char *argv[])
+{
+  long reps = 10000;
+
+  if (argc == 2)
+    reps = strtol (argv[1], 0, 0);
+
+  tests_start ();
+
+  check_data ();
+  check_random (reps);
+
+  tests_end ();
+  exit (0);
+}