Created
March 11, 2020 05:50
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mpnのテスト
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#include<iostream> | |
#include<gmpxx.h> | |
#include <time.h> | |
static const int N = 100000; | |
static void set_mpz_t(mpz_t& z, const uint64_t* p, int n) { | |
int s = n; | |
while (s > 0) { | |
if (p[s - 1]) break; | |
s--; | |
} | |
z->_mp_alloc = n; | |
z->_mp_size = s; | |
z->_mp_d = (mp_limb_t*)const_cast<uint64_t*>(p); | |
} | |
void bench_mpn() { | |
uint64_t z[8] = {0, 0, 0, 0, | |
0, 0, 0, 0}; | |
mpz_t mp, ma, mb; | |
uint64_t p[4] = {18446744073709551597UL, 18446744073709551615UL, | |
18446744073709551615UL, 9223372036854775807UL}; | |
uint64_t a[4] = {12049265542313455944UL, 18428321212165697550UL, | |
18222554336221631568UL, 10491275619564141046UL}; | |
uint64_t b[4] = {2858909295677371682UL, 16561264083360324415UL, | |
17568274556329439016UL, 11311893355857881102UL}; | |
set_mpz_t(mp, p, 4); | |
set_mpz_t(ma, a, 4); | |
set_mpz_t(mb, b, 4); | |
uint64_t r[5] = {0, 0, 0, 0, 0}; | |
uint64_t q[4] = {0, 0, 0, 0}; | |
time_t begin = clock(); | |
for (int i = 0; i < N; i++) { | |
mpn_mul_n((mp_limb_t*)z, (const mp_limb_t*)a, (const mp_limb_t*)b, 4); | |
mpn_tdiv_qr((mp_limb_t *)q, (mp_limb_t *)r, 0, | |
(const mp_limb_t *)z, 8, (const mp_limb_t *)p, 4); | |
} | |
time_t end = clock(); | |
printf("[+] mpn mul: %f usec\n", double(end-begin)*1e6/CLOCKS_PER_SEC/N); | |
std::cout << ma << std::endl; | |
std::cout << mb << std::endl; | |
std::cout << mp << std::endl; | |
mpz_t mr; | |
set_mpz_t(mr, r, 4); | |
std::cout << mr << std::endl; | |
} | |
void bench_mpz() { | |
mpz_class a, b, p; | |
mpz_class z; | |
a = mpz_class("91987f9740d639f6fce3849f1ebe9450ffbe8c8149eeb00ea737972bc5f2b148", 16); | |
b = mpz_class("9cfbeb12fd02a80ef3cf0ca0d68caf28e5d56df040209b3f27ace2db75e97522", 16); | |
p = mpz_class("57896044618658097711785492504343953926634992332820282019728792003956564819949", 10); | |
time_t begin = clock(); | |
for (int i = 0; i < N; i++) { | |
mpz_mul(z.get_mpz_t(), a.get_mpz_t(), b.get_mpz_t()); | |
mpz_mod(z.get_mpz_t(), z.get_mpz_t(), p.get_mpz_t()); | |
} | |
time_t end = clock(); | |
printf("[+] mpz mul: %f usec\n", double(end-begin)*1e6/CLOCKS_PER_SEC/N); | |
std::cout << a << std::endl; | |
std::cout << b << std::endl; | |
std::cout << p << std::endl; | |
std::cout << z << std::endl << std::endl; | |
} | |
int main() { | |
bench_mpz(); | |
bench_mpn(); | |
} |
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// $ g++ mpn_test.cpp -lgmpxx -lgmp -lpthread -Wall -Wextra | |
// $ ./a.out | |
[+] mpz mul: 0.144330 usec | |
65854804397986044180016985716769972144040936268822385523537747773291481968968 | |
71005905414564569448038202826108414854517662862897876748557178882117023135010 | |
57896044618658097711785492504343953926634992332820282019728792003956564819949 | |
15960092100224962172000327907369490154236460060176828892693191134550031904710 | |
[+] mpn mul: 0.107470 usec | |
65854804397986044180016985716769972144040936268822385523537747773291481968968 | |
71005905414564569448038202826108414854517662862897876748557178882117023135010 | |
57896044618658097711785492504343953926634992332820282019728792003956564819949 | |
15960092100224962172000327907369490154236460060176828892693191134550031904710 |
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