1 /* Test file for mpfr_add_si, mpfr_sub_si, mpfr_si_sub, mpfr_mul_si,
2 mpfr_div_si, mpfr_si_div
3
4 Copyright 2004, 2006-2023 Free Software Foundation, Inc.
5 Contributed by the AriC and Caramba projects, INRIA.
6
7 This file is part of the GNU MPFR Library.
8
9 The GNU MPFR Library is free software; you can redistribute it and/or modify
10 it under the terms of the GNU Lesser General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or (at your
12 option) any later version.
13
14 The GNU MPFR Library is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17 License for more details.
18
19 You should have received a copy of the GNU Lesser General Public License
20 along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
21 https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
22 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
23
24 #include "mpfr-test.h"
25
26 /* TODO: Add generic tests for mpfr_si_sub and mpfr_si_div.
27 tgeneric_ui.c should probably be replaced by tgeneric.c,
28 with some changes, since tgeneric.c does more checks. */
29
30 #define PRINT_ERROR1(s,i,z,exp) \
31 do \
32 { \
33 printf ("Error for " s " and i=%d\n", i); \
34 printf ("Expected %s\n", exp); \
35 printf ("Got "); mpfr_out_str (stdout, 16, 0, z, MPFR_RNDN); \
36 putchar ('\n'); \
37 exit(1); \
38 } \
39 while (0)
40
41 const struct {
42 const char * op1;
43 long int op2;
44 const char * res_add;
45 const char * res_sub;
46 const char * res_mul;
47 const char * res_div;
48 } tab[] = {
49 {"10", 0x1, "11", "0F", "10", "10"},
50 {"1", -1, "0", "2", "-1", "-1"},
51 {"17.42", -0x17, "0.42", "2E.42", "-216.ee", "-1.02de9bd37a6f4"},
52 {"-1024.0", -0x16, "-103A", "-100E", "16318", "bb.d1745d1745d0"}
53 };
54
55 static void
56 check_invert (void)
57 {
58 mpfr_t x;
59 mpfr_init2 (x, MPFR_PREC_MIN);
60
61 mpfr_set_ui (x, 0xC, MPFR_RNDN);
62 mpfr_si_sub (x, -1, x, MPFR_RNDD); /* -0001 - 1100 = - 1101 --> -1 0000 */
63 /* If MPFR_PREC_MIN = 2, then x is first set to 12 exactly, then we get
64 -13 which is rounded down to -16.
65 If MPFR_PREC_MIN = 1, then x is first set to 16 exactly, then we get
66 -17 which is rounded down to -32. */
67 if ((MPFR_PREC_MIN == 2 && mpfr_cmp_si (x, -0x10)) ||
68 (MPFR_PREC_MIN == 1 && mpfr_cmp_si (x, -0x20)))
69 {
70 printf ("Special rounding error\n");
71 exit (1);
72 }
73 mpfr_clear (x);
74 }
75
76 #define TEST_FUNCTION mpfr_add_si
77 #define TEST_FUNCTION_NAME "mpfr_add_si"
78 #define INTEGER_TYPE long
79 #define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1, RANDS)
80 #define test_generic_ui test_generic_add_si
81 #include "tgeneric_ui.c"
82
83 #define TEST_FUNCTION mpfr_sub_si
84 #define TEST_FUNCTION_NAME "mpfr_sub_si"
85 #define INTEGER_TYPE long
86 #define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1, RANDS)
87 #define test_generic_ui test_generic_sub_si
88 #include "tgeneric_ui.c"
89
90 #define TEST_FUNCTION mpfr_mul_si
91 #define TEST_FUNCTION_NAME "mpfr_mul_si"
92 #define INTEGER_TYPE long
93 #define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1, RANDS)
94 #define test_generic_ui test_generic_mul_si
95 #include "tgeneric_ui.c"
96
97 #define TEST_FUNCTION mpfr_div_si
98 #define TEST_FUNCTION_NAME "mpfr_div_si"
99 #define INTEGER_TYPE long
100 #define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1, RANDS)
101 #define test_generic_ui test_generic_div_si
102 #include "tgeneric_ui.c"
103
104
105 int
106 main (int argc, char *argv[])
107 {
108 mpfr_t x, z;
109 int y;
110 int i;
111
112 tests_start_mpfr ();
113 mpfr_inits2 (53, x, z, (mpfr_ptr) 0);
114 for(i = 0 ; i < numberof (tab) ; i++)
115 {
116 mpfr_set_str (x, tab[i].op1, 16, MPFR_RNDN);
117 y = tab[i].op2;
118 mpfr_add_si (z, x, y, MPFR_RNDZ);
119 if (mpfr_cmp_str (z, tab[i].res_add, 16, MPFR_RNDN))
120 PRINT_ERROR1 ("add_si", i, z, tab[i].res_add);
121 mpfr_sub_si (z, x, y, MPFR_RNDZ);
122 if (mpfr_cmp_str (z, tab[i].res_sub, 16, MPFR_RNDN))
123 PRINT_ERROR1 ("sub_si", i, z, tab[i].res_sub);
124 mpfr_si_sub (z, y, x, MPFR_RNDZ);
125 mpfr_neg (z, z, MPFR_RNDZ);
126 if (mpfr_cmp_str (z, tab[i].res_sub, 16, MPFR_RNDN))
127 PRINT_ERROR1 ("si_sub", i, z, tab[i].res_sub);
128 mpfr_mul_si (z, x, y, MPFR_RNDZ);
129 if (mpfr_cmp_str (z, tab[i].res_mul, 16, MPFR_RNDN))
130 PRINT_ERROR1 ("mul_si", i, z, tab[i].res_mul);
131 mpfr_div_si (z, x, y, MPFR_RNDZ);
132 if (mpfr_cmp_str (z, tab[i].res_div, 16, MPFR_RNDN))
133 PRINT_ERROR1 ("div_si", i, z, tab[i].res_div);
134 }
135 mpfr_set_str1 (x, "1");
136 mpfr_si_div (z, 1024, x, MPFR_RNDN);
137 if (mpfr_cmp_str1 (z, "1024"))
138 PRINT_ERROR1 ("si_div", i, z, "1024");
139 mpfr_si_div (z, -1024, x, MPFR_RNDN);
140 if (mpfr_cmp_str1 (z, "-1024"))
141 PRINT_ERROR1 ("si_div", i, z, "-1024");
142
143 mpfr_clears (x, z, (mpfr_ptr) 0);
144
145 check_invert ();
146
147 test_generic_add_si (MPFR_PREC_MIN, 200, 17);
148 test_generic_sub_si (MPFR_PREC_MIN, 200, 17);
149 test_generic_mul_si (MPFR_PREC_MIN, 200, 17);
150 test_generic_div_si (MPFR_PREC_MIN, 200, 17);
151
152 tests_end_mpfr ();
153 return 0;
154 }