initial interpeter testing

1 files changed, 32 insertions, 0 deletions

diff --git a/examples/main.c b/examples/main.c
new file mode 100644
index 0000000..d33ed10
--- /dev/null
+++ b/examples/main.c
@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include "../include/ejit/ejit.h"
+
+int main()
+{
+	struct ejit_func *f = ejit_create_func(EJIT_INT64, 0, NULL);
+
+	ejit_movi(f, EJIT_GPR(3), 1); // location 3 just has a constant 1 for
+				      // increment
+	ejit_movi(f, EJIT_GPR(2), 0); // location 2 is i = 0
+	ejit_movi(f, EJIT_GPR(1), 1000000000); // location 1 is limit = one billion
+	ejit_movi(f, EJIT_GPR(0), 0); // location 0 is total = 0
+
+	struct ejit_label l = ejit_label(f); // top
+	ejit_addr(f, EJIT_GPR(0), EJIT_GPR(0), EJIT_GPR(2)); // add i to total
+	ejit_addr(f, EJIT_GPR(2), EJIT_GPR(2), EJIT_GPR(3)); // add 1 to i
+	struct ejit_reloc r = ejit_bltr(f, EJIT_GPR(2), EJIT_GPR(1)); // if i is less than limit
+
+	ejit_ret(f, EJIT_GPR(0)); // return total
+
+	ejit_patch(f, r, l);
+
+	/* the highest location we used was 3, so we need to request 3 location
+	 * for general purpose registers in total. No floating point registers,
+	 * so 0. */
+	ejit_compile_func(f, 4, 0);
+	long result = ejit_run_func(f, 0, NULL); // no args so this is fine
+	printf("%ld\n", result);
+
+	ejit_destroy_func(f);
+	return 0;
+}