add bench of large prime

sample/large.cpp

@@ -3,18 +3,26 @@
 	make CFLAGS_USER="-DMCL_MAX_OP_BIT_SIZE=768"
 */
 #include <mcl/fp.hpp>
+#include <cybozu/benchmark.hpp>
 
 typedef mcl::FpT<> Fp;
 
-int main()
-	try
+void test(mcl::fp::Mode mode)
 {
+	printf("test %s\n", mcl::fp::ModeToStr(mode));
 	std::string pStr = "776259046150354467574489744231251277628443008558348305569526019013025476343188443165439204414323238975243865348565536603085790022057407195722143637520590569602227488010424952775132642815799222412631499596858234375446423426908029627";
-	Fp::init(pStr);
+	Fp::init(pStr, mode);
 	mpz_class p(pStr);
-	Fp a = 123456;
-	Fp::pow(a, a, p);
-	std::cout << a << std::endl;
+	Fp x = 123456;
+	Fp::pow(x, x, p);
+	std::cout << x << std::endl;
+	CYBOZU_BENCH("mul", Fp::mul, x, x, x);
+}
+int main()
+	try
+{
+	test(mcl::fp::FP_GMP);
+	test(mcl::fp::FP_GMP_MONT);
 } catch (std::exception& e) {
 	printf("err %s\n", e.what());
 	puts("make clean");