1 // (C) Copyright John Maddock 2019.
2 // Use, modification and distribution are subject to the
3 // Boost Software License, Version 1.0. (See accompanying file
4 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6 #include "constexpr_arithmetric_test.hpp"
7 #include "boost/multiprecision/cpp_int.hpp"
8 #include "boost/multiprecision/integer.hpp"
11 template <class F, class V>
12 decltype(std::declval<F>()(std::declval<V>())) non_constexpr_invoke(F f, V v)
19 constexpr T factorial(const T& a)
21 return a ? a * factorial(a - 1) : 1;
25 template <class T, class U>
26 constexpr T big_mul(const U& a, const U& b)
28 using boost::multiprecision::multiply;
30 multiply(result, a, b);
33 template <class T, class U>
34 constexpr T big_add(const U& a, const U& b)
36 using boost::multiprecision::add;
41 template <class T, class U>
42 constexpr T big_sub(const U& a, const U& b)
44 using boost::multiprecision::subtract;
46 subtract(result, a, b);
50 constexpr U div_qr_d(const U& a, const U& b)
52 using boost::multiprecision::divide_qr;
55 divide_qr(a, b, result, r);
59 constexpr U div_qr_r(const U& a, const U& b)
61 using boost::multiprecision::divide_qr;
64 divide_qr(a, b, result, r);
68 constexpr T do_bit_set(T val, unsigned pos)
70 using boost::multiprecision::bit_set;
75 constexpr T do_bit_unset(T val, unsigned pos)
77 using boost::multiprecision::bit_unset;
82 constexpr T do_bit_flip(T val, unsigned pos)
84 using boost::multiprecision::bit_flip;
89 constexpr T test_swap(T a, T b)
98 using namespace boost::multiprecision::literals;
100 typedef boost::multiprecision::checked_int1024_t int_backend;
101 typedef boost::multiprecision::checked_int512_t small_int_backend;
102 typedef boost::multiprecision::checked_uint1024_t unsigned_backend;
104 constexpr int_backend f1 = factorial(int_backend(31));
105 static_assert(f1 == 0x1956ad0aae33a4560c5cd2c000000_cppi);
106 constexpr unsigned_backend f2 = factorial(unsigned_backend(31));
107 static_assert(f2 == 0x1956ad0aae33a4560c5cd2c000000_cppui);
110 // Test integer non-member functions:
112 constexpr small_int_backend si1 = (std::numeric_limits<small_int_backend>::max)();
113 constexpr small_int_backend si2 = 239876;
114 constexpr std::int32_t i = (std::numeric_limits<int>::max)();
115 constexpr std::int32_t j = 239876;
118 constexpr int_backend i1 = big_mul<int_backend>(si1, si2);
120 multiply(nc, si1, si2);
121 BOOST_CHECK_EQUAL(nc, i1);
123 constexpr std::int64_t k = big_mul<std::int64_t>(i, j);
125 boost::multiprecision::multiply(ii, i, j);
126 BOOST_CHECK_EQUAL(ii, k);
130 constexpr int_backend i1 = big_add<int_backend>(si1, si2);
133 BOOST_CHECK_EQUAL(nc, i1);
135 constexpr std::int64_t k = big_add<std::int64_t>(i, j);
137 boost::multiprecision::add(ii, i, j);
138 BOOST_CHECK_EQUAL(ii, k);
142 constexpr int_backend i1 = big_sub<int_backend>(si1, -si2);
144 subtract(nc, si1, -si2);
145 BOOST_CHECK_EQUAL(nc, i1);
147 constexpr std::int64_t k = big_sub<std::int64_t>(i, -j);
149 boost::multiprecision::subtract(ii, i, -j);
150 BOOST_CHECK_EQUAL(ii, k);
154 constexpr small_int_backend i1 = div_qr_d(si1, si2);
155 small_int_backend nc, nc2;
156 divide_qr(si1, si2, nc, nc2);
157 BOOST_CHECK_EQUAL(nc, i1);
159 constexpr std::int64_t k = div_qr_d(i, j);
161 boost::multiprecision::divide_qr(i, j, ii, ij);
162 BOOST_CHECK_EQUAL(ii, k);
166 constexpr small_int_backend i1 = div_qr_r(si1, si2);
167 small_int_backend nc, nc2;
168 divide_qr(si1, si2, nc, nc2);
169 BOOST_CHECK_EQUAL(nc2, i1);
171 constexpr std::int64_t k = div_qr_r(i, j);
173 boost::multiprecision::divide_qr(i, j, ii, ij);
174 BOOST_CHECK_EQUAL(ij, k);
178 constexpr int i1 = integer_modulus(si1, 67);
179 small_int_backend nc(si1);
180 int r = integer_modulus(nc, 67);
181 BOOST_CHECK_EQUAL(r, i1);
183 constexpr std::int32_t k = boost::multiprecision::integer_modulus(i, j);
185 r = boost::multiprecision::integer_modulus(ii, j);
186 BOOST_CHECK_EQUAL(r, k);
190 constexpr small_int_backend i1 = powm(si1, si2, si2);
191 small_int_backend nc(si1);
192 nc = powm(nc, si2, si2);
193 BOOST_CHECK_EQUAL(nc, i1);
195 constexpr std::int32_t k = boost::multiprecision::powm(i, j, j);
197 ii = boost::multiprecision::powm(ii, j, j);
198 BOOST_CHECK_EQUAL(ii, k);
202 constexpr int i1 = lsb(si1);
203 small_int_backend nc(si1);
205 BOOST_CHECK_EQUAL(nci, i1);
207 constexpr std::int32_t k = boost::multiprecision::lsb(i);
209 ii = boost::multiprecision::lsb(ii);
210 BOOST_CHECK_EQUAL(ii, k);
214 constexpr int i1 = msb(si1);
215 small_int_backend nc(si1);
217 BOOST_CHECK_EQUAL(nci, i1);
219 constexpr std::int32_t k = boost::multiprecision::msb(i);
221 ii = boost::multiprecision::msb(ii);
222 BOOST_CHECK_EQUAL(ii, k);
226 constexpr bool b = bit_test(si1, 1);
229 constexpr bool k = boost::multiprecision::bit_test(i, 1);
234 constexpr int_backend i(0);
235 constexpr int_backend j = do_bit_set(i, 20);
236 static_assert(bit_test(j, 20));
239 constexpr int jj = do_bit_set(ii, 20);
240 static_assert(boost::multiprecision::bit_test(jj, 20));
244 constexpr int_backend r = do_bit_unset(si1, 20);
245 static_assert(bit_test(r, 20) == false);
247 constexpr int jj = do_bit_unset(i, 20);
248 static_assert(boost::multiprecision::bit_test(jj, 20) == false);
252 constexpr int_backend r = do_bit_flip(si1, 20);
253 static_assert(bit_test(r, 20) == false);
255 constexpr int jj = do_bit_flip(i, 20);
256 static_assert(boost::multiprecision::bit_test(jj, 20) == false);
260 constexpr int_backend r = sqrt(si1);
261 small_int_backend nc(si1);
263 BOOST_CHECK_EQUAL(nc, r);
265 constexpr int jj = boost::multiprecision::sqrt(i);
267 k = boost::multiprecision::sqrt(k);
268 BOOST_CHECK_EQUAL(jj, k);
272 constexpr small_int_backend r = test_swap(si1, si2);
273 static_assert(si1 == r);
277 constexpr int_backend i(si1), j(si1 / 3);
278 constexpr int_backend k = gcd(i, j);
280 int_backend ii(i), jj(j);
281 BOOST_CHECK_EQUAL(k, gcd(ii, jj));
283 constexpr unsigned_backend ui(i), uj(j);
284 constexpr unsigned_backend uk = gcd(ui, uj);
285 unsigned_backend uii(ui), ujj(uj);
286 BOOST_CHECK_EQUAL(uk, gcd(uii, ujj));
288 constexpr int_backend l = lcm(i, j);
289 BOOST_CHECK_EQUAL(l, lcm(ii, jj));
290 constexpr unsigned_backend ul = lcm(ui, uj);
291 BOOST_CHECK_EQUAL(ul, lcm(uii, ujj));
293 return boost::report_errors();