gcc/mpfr/tests/tsi_op.c

/* Test file for mpfr_add_si, mpfr_sub_si, mpfr_si_sub, mpfr_mul_si,
   mpfr_div_si, mpfr_si_div

Copyright 2004, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
Contributed by the Arenaire and Cacao projects, INRIA.

This file is part of the GNU MPFR Library.

The GNU MPFR 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 2.1 of the License, or (at your
option) any later version.

The GNU MPFR 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 MPFR Library; see the file COPYING.LIB.  If not, write to
the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301, USA. */

#include <stdio.h>
#include <stdlib.h>

#include "mpfr-test.h"

#define ERROR1(s, i, z, exp) \
{\
  printf("Error for "s" and i=%d\n", i);\
  printf("Expected %s\n", exp);\
  printf("Got      "); mpfr_out_str (stdout, 16, 0, z, GMP_RNDN);\
  putchar ('\n');\
  exit(1);\
}

const struct {
  const char * op1;
  long int op2;
  const char * res_add;
  const char * res_sub;
  const char * res_mul;
  const char * res_div;
} tab[] = {
  {"10", 0x1, "11", "0F", "10", "10"},
  {"1", -1,  "0",   "2",   "-1",  "-1"},
  {"17.42", -0x17, "0.42", "2E.42", "-216.ee", "-1.02de9bd37a6f4"},
  {"-1024.0", -0x16,  "-103A", "-100E", "16318", "bb.d1745d1745d0"}
};

static void
check_invert (void)
{
  mpfr_t x;
  mpfr_init2 (x, MPFR_PREC_MIN);

  mpfr_set_ui (x, 0xC, GMP_RNDN);
  mpfr_si_sub (x, -1, x, GMP_RNDD); /* -0001 - 1100 = - 1101 --> -1 0000 */
  if (mpfr_cmp_si (x, -0x10) )
    {
      printf ("Special rounding error\n");
      exit (1);
    }
  mpfr_clear (x);
}

#define TEST_FUNCTION mpfr_add_si
#define TEST_FUNCTION_NAME "mpfr_add_si"
#define INTEGER_TYPE  long
#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1)
#define test_generic_ui test_generic_add_si
#include "tgeneric_ui.c"

#define TEST_FUNCTION mpfr_sub_si
#define TEST_FUNCTION_NAME "mpfr_sub_si"
#define INTEGER_TYPE  long
#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1)
#define test_generic_ui test_generic_sub_si
#include "tgeneric_ui.c"

#define TEST_FUNCTION mpfr_mul_si
#define TEST_FUNCTION_NAME "mpfr_mul_si"
#define INTEGER_TYPE  long
#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1)
#define test_generic_ui test_generic_mul_si
#include "tgeneric_ui.c"

#define TEST_FUNCTION mpfr_div_si
#define TEST_FUNCTION_NAME "mpfr_div_si"
#define INTEGER_TYPE  long
#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1)
#define test_generic_ui test_generic_div_si
#include "tgeneric_ui.c"


int
main (int argc, char *argv[])
{
  mpfr_t x, z;
  int y;
  int i;

  tests_start_mpfr ();
  mpfr_inits2 (53, x, z, (mpfr_ptr) 0);
  for(i = 0 ; i < numberof (tab) ; i++)
    {
      mpfr_set_str (x, tab[i].op1, 16, GMP_RNDN);
      y = tab[i].op2;
      mpfr_add_si (z, x, y, GMP_RNDZ);
      if (mpfr_cmp_str (z, tab[i].res_add, 16, GMP_RNDN))
        ERROR1("add_si", i, z, tab[i].res_add);
      mpfr_sub_si (z, x, y, GMP_RNDZ);
      if (mpfr_cmp_str (z, tab[i].res_sub, 16, GMP_RNDN))
        ERROR1("sub_si", i, z, tab[i].res_sub);
      mpfr_si_sub (z, y, x, GMP_RNDZ);
      mpfr_neg (z, z, GMP_RNDZ);
      if (mpfr_cmp_str (z, tab[i].res_sub, 16, GMP_RNDN))
        ERROR1("si_sub", i, z, tab[i].res_sub);
      mpfr_mul_si (z, x, y, GMP_RNDZ);
      if (mpfr_cmp_str (z, tab[i].res_mul, 16, GMP_RNDN))
        ERROR1("mul_si", i, z, tab[i].res_mul);
      mpfr_div_si (z, x, y, GMP_RNDZ);
      if (mpfr_cmp_str (z, tab[i].res_div, 16, GMP_RNDN))
        ERROR1("div_si", i, z, tab[i].res_div);
    }
  mpfr_set_str1 (x, "1");
  mpfr_si_div (z, 1024, x, GMP_RNDN);
  if (mpfr_cmp_str1 (z, "1024"))
    ERROR1("si_div", i, z, "1024");
  mpfr_si_div (z, -1024, x, GMP_RNDN);
  if (mpfr_cmp_str1 (z, "-1024"))
    ERROR1("si_div", i, z, "-1024");

  mpfr_clears (x, z, (mpfr_ptr) 0);

  check_invert ();

  test_generic_add_si (2, 200, 17);
  test_generic_sub_si (2, 200, 17);
  test_generic_mul_si (2, 200, 17);
  test_generic_div_si (2, 200, 17);

  tests_end_mpfr ();
  return 0;
}