Imported gcc-4.4.3

[msp430-gcc.git] / gmp / tests / mpz / t-fdiv_ui.c

diff --git a/gmp/tests/mpz/t-fdiv_ui.c b/gmp/tests/mpz/t-fdiv_ui.c
new file mode 100644 (file)
index 0000000..3012d9b
--- /dev/null
+++ b/gmp/tests/mpz/t-fdiv_ui.c
@@ -0,0 +1,159 @@
+/* Test mpz_abs, mpz_add, mpz_cmp, mpz_cmp_ui, mpz_fdiv_qr_ui, mpz_fdiv_q_ui,
+   mpz_fdiv_r_ui, mpz_fdiv_ui, mpz_mul_ui.
+
+Copyright 1993, 1994, 1996, 2000, 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 dump_abort __GMP_PROTO ((char *, mpz_t, unsigned long));
+void debug_mp __GMP_PROTO ((mpz_t, int));
+
+int
+main (int argc, char **argv)
+{
+  mpz_t dividend;
+  mpz_t quotient, remainder;
+  mpz_t quotient2, remainder2;
+  mpz_t temp;
+  mp_size_t dividend_size;
+  unsigned long divisor;
+  int i;
+  int reps = 10000;
+  gmp_randstate_ptr rands;
+  mpz_t bs;
+  unsigned long bsi, size_range;
+  unsigned long r_rq, r_q, r_r, r;
+
+  tests_start ();
+  rands = RANDS;
+
+  mpz_init (bs);
+
+  if (argc == 2)
+     reps = atoi (argv[1]);
+
+  mpz_init (dividend);
+  mpz_init (quotient);
+  mpz_init (remainder);
+  mpz_init (quotient2);
+  mpz_init (remainder2);
+  mpz_init (temp);
+
+  for (i = 0; i < reps; i++)
+    {
+      mpz_urandomb (bs, rands, 32);
+      size_range = mpz_get_ui (bs) % 10 + 2; /* 0..2047 bit operands */
+
+      do
+       {
+         mpz_rrandomb (bs, rands, 64);
+         divisor = mpz_get_ui (bs);
+       }
+      while (divisor == 0);
+
+      mpz_urandomb (bs, rands, size_range);
+      dividend_size = mpz_get_ui (bs);
+      mpz_rrandomb (dividend, rands, dividend_size);
+
+      mpz_urandomb (bs, rands, 2);
+      bsi = mpz_get_ui (bs);
+      if ((bsi & 1) != 0)
+       mpz_neg (dividend, dividend);
+
+      /* printf ("%ld\n", SIZ (dividend)); */
+
+      r_rq = mpz_fdiv_qr_ui (quotient, remainder, dividend, divisor);
+      r_q = mpz_fdiv_q_ui (quotient2, dividend, divisor);
+      r_r = mpz_fdiv_r_ui (remainder2, dividend, divisor);
+      r = mpz_fdiv_ui (dividend, divisor);
+
+      /* First determine that the quotients and remainders computed
+        with different functions are equal.  */
+      if (mpz_cmp (quotient, quotient2) != 0)
+       dump_abort ("quotients from mpz_fdiv_qr_ui and mpz_fdiv_q_ui differ",
+                   dividend, divisor);
+      if (mpz_cmp (remainder, remainder2) != 0)
+       dump_abort ("remainders from mpz_fdiv_qr_ui and mpz_fdiv_r_ui differ",
+                   dividend, divisor);
+
+      /* Check if the sign of the quotient is correct.  */
+      if (mpz_cmp_ui (quotient, 0) != 0)
+       if ((mpz_cmp_ui (quotient, 0) < 0)
+           != (mpz_cmp_ui (dividend, 0) < 0))
+       dump_abort ("quotient sign wrong", dividend, divisor);
+
+      /* Check if the remainder has the same sign as the (positive) divisor
+        (quotient rounded towards minus infinity).  */
+      if (mpz_cmp_ui (remainder, 0) != 0)
+       if (mpz_cmp_ui (remainder, 0) < 0)
+         dump_abort ("remainder sign wrong", dividend, divisor);
+
+      mpz_mul_ui (temp, quotient, divisor);
+      mpz_add (temp, temp, remainder);
+      if (mpz_cmp (temp, dividend) != 0)
+       dump_abort ("n mod d != n - [n/d]*d", dividend, divisor);
+
+      mpz_abs (remainder, remainder);
+      if (mpz_cmp_ui (remainder, divisor) >= 0)
+       dump_abort ("remainder greater than divisor", dividend, divisor);
+
+      if (mpz_cmp_ui (remainder, r_rq) != 0)
+       dump_abort ("remainder returned from mpz_fdiv_qr_ui is wrong",
+                   dividend, divisor);
+      if (mpz_cmp_ui (remainder, r_q) != 0)
+       dump_abort ("remainder returned from mpz_fdiv_q_ui is wrong",
+                   dividend, divisor);
+      if (mpz_cmp_ui (remainder, r_r) != 0)
+       dump_abort ("remainder returned from mpz_fdiv_r_ui is wrong",
+                   dividend, divisor);
+      if (mpz_cmp_ui (remainder, r) != 0)
+       dump_abort ("remainder returned from mpz_fdiv_ui is wrong",
+                   dividend, divisor);
+    }
+
+  mpz_clear (bs);
+  mpz_clear (dividend);
+  mpz_clear (quotient);
+  mpz_clear (remainder);
+  mpz_clear (quotient2);
+  mpz_clear (remainder2);
+  mpz_clear (temp);
+
+  tests_end ();
+  exit (0);
+}
+
+void
+dump_abort (char *str, mpz_t dividend, unsigned long divisor)
+{
+  fprintf (stderr, "ERROR: %s\n", str);
+  fprintf (stderr, "dividend = "); debug_mp (dividend, -16);
+  fprintf (stderr, "divisor  = %lX\n", divisor);
+  abort();
+}
+
+void
+debug_mp (mpz_t x, int base)
+{
+  mpz_out_str (stderr, base, x); fputc ('\n', stderr);
+}