--- /dev/null
+/* Test file for mpfr_mul_ui.
+
+Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 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"
+
+static void
+check_inexact (mp_prec_t p)
+{
+ mpfr_t x, y, z;
+ unsigned long u;
+ mp_prec_t q;
+ int inexact, cmp;
+ int rnd;
+
+ mpfr_init2 (x, p);
+ mpfr_init (y);
+ mpfr_init2 (z, p + mp_bits_per_limb);
+ mpfr_urandomb (x, RANDS);
+ u = randlimb ();
+ if (mpfr_mul_ui (z, x, u, GMP_RNDN))
+ {
+ printf ("Error: result should be exact\n");
+ exit (1);
+ }
+
+ for (q = 2; q <= p; q++)
+ for (rnd = 0; rnd < GMP_RND_MAX; rnd++)
+ {
+ mpfr_set_prec (y, q);
+ inexact = mpfr_mul_ui (y, x, u, (mp_rnd_t) rnd);
+ cmp = mpfr_cmp (y, z);
+ if (((inexact == 0) && (cmp != 0)) ||
+ ((inexact < 0) && (cmp >= 0)) ||
+ ((inexact > 0) && (cmp <= 0)))
+ {
+ printf ("Wrong inexact flag for p=%u, q=%u, rnd=%s\n",
+ (unsigned int) p, (unsigned int) q,
+ mpfr_print_rnd_mode ((mp_rnd_t) rnd));
+ exit (1);
+ }
+ }
+
+ mpfr_set_prec (x, 2);
+ mpfr_set_ui (x, 1, GMP_RNDN);
+ if (mpfr_mul_ui (x, x, 5, GMP_RNDZ) == 0)
+ {
+ printf ("mul_ui(1, 5) cannot be exact with prec=2\n");
+ exit (1);
+ }
+
+ mpfr_clear (x);
+ mpfr_clear (y);
+ mpfr_clear (z);
+}
+
+#define TEST_FUNCTION mpfr_mul_ui
+#define INTEGER_TYPE unsigned long
+#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1)
+#include "tgeneric_ui.c"
+
+int
+main (int argc, char *argv[])
+{
+ mpfr_t x, y;
+ unsigned int xprec, yprec, i;
+ mp_prec_t p;
+ mp_exp_t emax;
+
+ tests_start_mpfr ();
+
+ for (p=2; p<100; p++)
+ for (i=1; i<50; i++)
+ check_inexact (p);
+
+ mpfr_init2 (x, 53);
+ mpfr_init2 (y, 53);
+
+ /* checks that result is normalized */
+ mpfr_set_str (y, "6.93147180559945286227e-01", 10, GMP_RNDZ);
+ mpfr_mul_ui (x, y, 1, GMP_RNDZ);
+ if (MPFR_MANT(x)[MPFR_PREC(x)/mp_bits_per_limb] >> (mp_bits_per_limb-1) == 0)
+ {
+ printf ("Error in mpfr_mul_ui: result not normalized\n");
+ exit (1);
+ }
+ if (mpfr_cmp (x, y))
+ {
+ printf ("Error in mpfr_mul_ui: 1*y != y\n");
+ printf ("y= "); mpfr_print_binary (y); puts ("");
+ printf ("1*y="); mpfr_print_binary (x); puts ("");
+ exit (1);
+ }
+
+ mpfr_set_inf (x, 1);
+ mpfr_mul_ui (x, x, 3, GMP_RNDU);
+ if (!mpfr_inf_p (x) || (mpfr_sgn (x) <= 0))
+ {
+ printf ("Error in mpfr_mul_ui: +Inf*3 does not give +Inf\n");
+ exit (1);
+ }
+
+ mpfr_set_inf (x, -1);
+ mpfr_mul_ui (x, x, 3, GMP_RNDU);
+ if (!mpfr_inf_p (x) || (mpfr_sgn (x) >= 0))
+ {
+ printf ("Error in mpfr_mul_ui: -Inf*3 does not give -Inf\n");
+ exit (1);
+ }
+
+ mpfr_set_nan (x);
+ mpfr_mul_ui (x, x, 3, GMP_RNDU);
+ if (!mpfr_nan_p(x))
+ {
+ printf ("Error in mpfr_mul_ui: NaN*3 does not give NaN\n");
+ exit (1);
+ }
+
+ mpfr_set_inf (x, 1);
+ mpfr_mul_ui (x, x, 0, GMP_RNDU);
+ MPFR_ASSERTN(mpfr_nan_p (x));
+
+ mpfr_set_ui (x, 1, GMP_RNDU);
+ mpfr_mul_ui (x, x, 0, GMP_RNDU);
+ MPFR_ASSERTN(mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS(x));
+
+ emax = mpfr_get_emax ();
+ set_emax (0);
+ mpfr_set_str_binary (x, "0.1E0");
+ mpfr_mul_ui (x, x, 2, GMP_RNDN);
+ MPFR_ASSERTN(mpfr_inf_p (x) && MPFR_IS_POS(x));
+ set_emax (emax);
+
+ mpfr_set_str (x, /*1.0/3.0*/
+ "0.333333333333333333333333333333333", 10, GMP_RNDZ);
+ mpfr_mul_ui (x, x, 3, GMP_RNDU);
+ if (mpfr_cmp_ui (x, 1))
+ {
+ printf ("Error in mpfr_mul_ui: U(Z(1/3)*3) does not give 1\n");
+ exit (1);
+ }
+
+ /* checks sign is correct */
+ mpfr_set_si (x, -2, GMP_RNDZ);
+ mpfr_set_si (y, 3, GMP_RNDZ);
+ mpfr_mul_ui(x, y, 4, GMP_RNDZ);
+ if (mpfr_cmp_ui(x, 0) <= 0)
+ {
+ printf("Error in mpfr_mul_ui: 4*3.0 does not give a positive result:\n");
+ mpfr_print_binary(x); puts ("");
+ printf("mpfr_cmp_ui(x, 0) = %d\n", mpfr_cmp_ui(x, 0));
+ exit(1);
+ }
+
+ mpfr_set_prec (x, 9);
+ mpfr_set_prec (y, 9);
+ mpfr_set_str_binary (y, "0.100001111E9"); /* 271 */
+ mpfr_mul_ui (x, y, 1335, GMP_RNDN);
+ mpfr_set_str_binary (y, "0.101100001E19"); /* 361472 */
+ if (mpfr_cmp (x, y))
+ {
+ printf ("Error in mul_ui for 1335*(0.100001111E9)\n");
+ printf ("got "); mpfr_print_binary (x); puts ("");
+ exit(1);
+ }
+
+ mpfr_set_prec(y, 100);
+ mpfr_set_prec(x, 100);
+ /* y = 1199781142214086656 */
+ mpfr_set_str_binary(y, "0.1000010100110011110101001011110010101111000100001E61");
+ mpfr_mul_ui(x, y, 121, GMP_RNDD);
+ /* 121*y = 145173518207904485376, representable exactly */
+ mpfr_set_str_binary(y, "0.1111101111010101111111100011010010111010111110110011001E67");
+ if (mpfr_cmp(x, y))
+ {
+ printf("Error for 121*y: expected result is:\n");
+ mpfr_print_binary(y); puts ("");
+ }
+
+ mpfr_set_prec (x, 32);
+ mpfr_set_str_binary (x, "0.10000000000000000000000000000000E1");
+ mpfr_set_prec (y, 93);
+ mpfr_mul_ui (y, x, 1, GMP_RNDN);
+
+ mpfr_set_prec (x, 287);
+ mpfr_set_str_binary (x, "0.1111E7");
+ mpfr_set_prec (y, 289);
+ mpfr_mul_ui (y, x, 6, GMP_RNDN);
+ mpfr_set_str_binary (x, "0.101101E10");
+ if (mpfr_cmp (x, y))
+ {
+ printf ("Error for 6 * 120\n");
+ exit (1);
+ }
+
+ mpfr_set_prec (x, 68);
+ mpfr_set_prec (y, 64);
+ mpfr_set_str (x, "2143861251406875.0", 10, GMP_RNDN);
+ mpfr_mul_ui (y, x, 23, GMP_RNDN);
+ mpfr_set_str_binary (x, "10101111001011100001100110101111110001010010011001101101.0");
+ if (mpfr_cmp (x, y))
+ {
+ printf ("Error for 23 * 2143861251406875.0\n");
+ printf ("expected "); mpfr_print_binary (x); puts ("");
+ printf ("got "); mpfr_print_binary (y); puts ("");
+ exit (1);
+ }
+
+
+ for (xprec = 53; xprec <= 128; xprec++)
+ {
+ mpfr_set_prec (x, xprec);
+ mpfr_set_str_binary (x, "0.1100100100001111110011111000000011011100001100110111E2");
+ for (yprec = 53; yprec <= 128; yprec++)
+ {
+ mpfr_set_prec (y, yprec);
+ mpfr_mul_ui (y, x, 1, GMP_RNDN);
+ if (mpfr_cmp(x,y))
+ {
+ printf ("multiplication by 1.0 fails for xprec=%u, yprec=%u\n",
+ xprec, yprec);
+ printf ("expected "); mpfr_print_binary (x); puts ("");
+ printf ("got "); mpfr_print_binary (y); puts ("");
+ exit (1);
+ }
+ }
+ }
+
+ mpfr_set_prec (x, 128);
+ mpfr_set_ui (x, 17, GMP_RNDN);
+ mpfr_mul_ui (x, x, ULONG_HIGHBIT, GMP_RNDN);
+ mpfr_set_prec (y, 128);
+ mpfr_set_ui (y, ULONG_HIGHBIT, GMP_RNDN);
+ mpfr_mul_ui (y, y, 17, GMP_RNDN);
+ if (mpfr_cmp (x, y))
+ {
+ printf ("Error for 17 * ULONG_HIGHBIT\n");
+ exit (1);
+ }
+
+ /* Check regression */
+ mpfr_set_prec (x, 32);
+ mpfr_set_prec (y, 96);
+ mpfr_set_ui (x, 1742175942, GMP_RNDN);
+ mpfr_mul_ui (y, x, 59, GMP_RNDN);
+ if (mpfr_cmp_str (y, "0.10111111011101010101000110111101000100000000000000"
+ "0000000000000000000000000000000000000000000000E37",
+ 2, GMP_RNDN))
+ {
+ printf ("Regression tested failed for x=1742175942 * 59\n");
+ exit (1);
+ }
+
+ mpfr_clear(x);
+ mpfr_clear(y);
+
+ test_generic_ui (2, 500, 100);
+
+ tests_end_mpfr ();
+ return 0;
+}
projects / msp430-gcc.git / blobdiff