start adding tests

1 files changed, 26 insertions, 0 deletions

diff --git a/tests/subr.c b/tests/subr.c
new file mode 100644
index 0000000..e2c22bc
--- /dev/null
+++ b/tests/subr.c
@@ -0,0 +1,26 @@
+#include "test.h"
+
+static void
+run_test(jit_state_t *j, uint8_t *arena_base, size_t arena_size)
+{
+	jit_begin(j, arena_base, arena_size);
+	size_t align = jit_enter_jit_abi(j, 0, 0, 0);
+	jit_load_args_2(j, jit_operand_gpr (JIT_OPERAND_ABI_WORD, JIT_R0),
+	                jit_operand_gpr (JIT_OPERAND_ABI_WORD, JIT_R1));
+
+	jit_subr(j, JIT_R0, JIT_R0, JIT_R1);
+	jit_leave_jit_abi(j, 0, 0, align);
+	jit_retr(j, JIT_R0);
+
+	size_t size = 0;
+	void* ret = jit_end(j, &size);
+
+	int (*f)(int, int) = ret;
+	ASSERT(f(42, 69) == -27);
+}
+
+int
+main (int argc, char *argv[])
+{
+	return main_helper(argc, argv, run_test);
+}