| /* 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; |
| } |