Added new commits from bn256 submodule repo

.gitmodules

@@ -28,3 +28,6 @@
 [submodule "libraries/libfc/libraries/ff"]
 	path = libraries/libfc/libraries/ff
 	url = https://github.com/AntelopeIO/libff
+[submodule "libraries/libfc/libraries/bn256"]
+	path = libraries/libfc/libraries/bn256
+	url = https://github.com/AntelopeIO/bn256

benchmark/CMakeLists.txt

@@ -1,7 +1,7 @@
 file(GLOB BENCHMARK "*.cpp")
 add_executable( benchmark ${BENCHMARK} )
 
-target_link_libraries( benchmark fc Boost::program_options )
+target_link_libraries( benchmark fc bn256 Boost::program_options )
 target_include_directories( benchmark PUBLIC
                             "${CMAKE_CURRENT_SOURCE_DIR}"
                           )

benchmark/benchmark.cpp

@@ -10,6 +10,7 @@ namespace benchmark {
 // update this map when a new feature is supported
 // key is the name and value is the function doing benchmarking
 std::map<std::string, std::function<void()>> features {
+   { "bn_256", bn_256_benchmarking },
    { "alt_bn_128", alt_bn_128_benchmarking },
    { "modexp", modexp_benchmarking },
    { "key", key_benchmarking },

benchmark/benchmark.hpp

@@ -14,6 +14,7 @@ std::map<std::string, std::function<void()>> get_features();
 void print_header();
 bytes to_bytes(const std::string& source);
 
+void bn_256_benchmarking();
 void alt_bn_128_benchmarking();
 void modexp_benchmarking();
 void key_benchmarking();

benchmark/bn_256.cpp

@@ -0,0 +1,42 @@
+#include <iostream>
+#include <bn256.h>
+#include <benchmark.hpp>
+
+namespace benchmark {
+
+   void benchmark_bn_256_g1() {
+      const auto x = int512_t("17482507071749278111455282041915610272829864719113987536544577255487650163890");
+      auto f = [&]() {
+         bn256::g1 g1{};
+         g1.scalar_base_mult(x);
+      };
+
+      benchmarking("bn_256_g1", f);
+   }
+
+   void benchmark_bn_256_g2() {
+      const auto x = int512_t("14506523411943850241455301787384885005987154472366374992538170185465884650319");
+      auto f = [&]() {
+         bn256::g2 g2{};
+         g2.scalar_base_mult(x);
+      };
+
+      benchmarking("bn_256_g2", f);
+   }
+
+   void benchmark_bn_256_pair() {
+      bn256::g1 g1{bn256::g1::curve_gen};
+      bn256::g2 g2{bn256::g2::twist_gen};
+      auto f = [&]() {
+         bn256::pair(g1, g2);
+      };
+
+      benchmarking("bn_256_pair", f);
+   }
+
+   void bn_256_benchmarking() {
+      benchmark_bn_256_g1();
+      benchmark_bn_256_g2();
+      benchmark_bn_256_pair();
+   }
+}

libraries/libfc/CMakeLists.txt

@@ -6,6 +6,7 @@ set( USE_ASM OFF CACHE BOOL "" FORCE)
 set( IS_LIBFF_PARENT OFF CACHE BOOL "" FORCE)
 set( FF_INSTALL_COMPONENT "${FC_INSTALL_COMPONENT}")
 add_subdirectory( libraries/ff )
+add_subdirectory( libraries/bn256 )
 
 set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
 set(THREADS_PREFER_PTHREAD_FLAG TRUE)