Subzero. Native 64-bit int arithmetic on x86-64.

crosstest/test_vector_ops_main.cpp

Index: crosstest/test_vector_ops_main.cpp
diff --git a/crosstest/test_vector_ops_main.cpp b/crosstest/test_vector_ops_main.cpp
index 1232799a9be27e47aff55107356f8dbcc98df1c0..4b9591a5cc3fa8d1ef1942f8237e34866d9e2904 100644
--- a/crosstest/test_vector_ops_main.cpp
+++ b/crosstest/test_vector_ops_main.cpp
@@ -130,7 +130,11 @@ void testExtractElement(size_t &TotalTests, size_t &Passes, size_t &Failures) {
   free(TestVectors);
 }
 
+#ifdef X8664_STACK_HACK
+extern "C" int wrapped_main(int argc, char *argv[]) {
+#else  // !defined(X8664_STACK_HACK)
 int main(int argc, char *argv[]) {
+#endif // X8664_STACK_HACK
   size_t TotalTests = 0;
   size_t Passes = 0;
   size_t Failures = 0;