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

crosstest/simple_loop_main.c

Index: crosstest/simple_loop_main.c
diff --git a/crosstest/simple_loop_main.c b/crosstest/simple_loop_main.c
index 5ff36b87a109affc2f3d0ded533825e0ec978b4f..6c738b947a1e4db1fb0fb55db5fcbe9e466afc3b 100644
--- a/crosstest/simple_loop_main.c
+++ b/crosstest/simple_loop_main.c
@@ -6,7 +6,11 @@
 int simple_loop(int *a, int n);
 int Subzero_simple_loop(int *a, int n);
 
-int main(int argc, char **argv) {
+#ifdef X8664_STACK_HACK
+int wrapped_main(int argc, char *argv[]) {
+#else  // !defined(X8664_STACK_HACK)
+int main(int argc, char *argv[]) {
+#endif // X8664_STACK_HACK
   unsigned TotalTests = 0;
   unsigned Passes = 0;
   unsigned Failures = 0;