test: Compare EVMC and evmone instruction tables

test/unittests/CMakeLists.txt

@@ -21,10 +21,11 @@ add_executable(evmone-unittests
     analysis_test.cpp
     bytecode_test.cpp
     evmone_test.cpp
+    op_table_test.cpp
     utils_test.cpp
     vm_loader_evmone.cpp
 )
-target_link_libraries(evmone-unittests PRIVATE evm-unittests evmone testutils GTest::gtest GTest::gtest_main)
+target_link_libraries(evmone-unittests PRIVATE evm-unittests evmone testutils evmc::instructions GTest::gtest GTest::gtest_main)
 target_include_directories(evmone-unittests PRIVATE ${evmone_private_include_dir})
 
 gtest_discover_tests(evmone-unittests TEST_PREFIX ${PROJECT_NAME}/unittests/)

test/unittests/op_table_test.cpp

@@ -0,0 +1,30 @@
+// evmone: Fast Ethereum Virtual Machine implementation
+// Copyright 2019 The evmone Authors.
+// Licensed under the Apache License, Version 2.0.
+
+#include <evmc/instructions.h>
+#include <evmone/analysis.hpp>
+#include <gtest/gtest.h>
+
+TEST(op_table, compare_with_evmc_instruction_tables)
+{
+    for (int r = EVMC_FRONTIER; r <= EVMC_MAX_REVISION; ++r)
+    {
+        const auto rev = static_cast<evmc_revision>(r);
+        const auto& evmone_tbl = evmone::get_op_table(rev);
+        const auto* evmc_tbl = evmc_get_instruction_metrics_table(rev);
+
+        for (size_t i = 0; i < evmone_tbl.size(); ++i)
+        {
+            const auto& metrics = evmone_tbl[i];
+            const auto& ref_metrics = evmc_tbl[i];
+
+            // Compare gas costs. Normalize -1 values in EVMC for undefined instructions.
+            EXPECT_EQ(metrics.gas_cost, std::max(ref_metrics.gas_cost, int16_t{0}));
+
+            EXPECT_EQ(metrics.stack_req, ref_metrics.num_stack_arguments);
+            EXPECT_EQ(metrics.stack_change,
+                ref_metrics.num_stack_returned_items - ref_metrics.num_stack_arguments);
+        }
+    }
+}