start adding tests

1 files changed, 27 insertions, 0 deletions

diff --git a/tests/extr_us.c b/tests/extr_us.c
new file mode 100644
index 0000000..61374cc
--- /dev/null
+++ b/tests/extr_us.c
@@ -0,0 +1,27 @@
+#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_1(j, jit_operand_gpr (JIT_OPERAND_ABI_WORD, JIT_R1));
+
+	jit_extr_us(j, JIT_R0, JIT_R1);
+	jit_leave_jit_abi(j, 0, 0, align);
+	jit_retr(j, JIT_R0);
+
+	jit_uword_t (*f)(jit_uword_t) = jit_end(j, NULL);
+
+	ASSERT(f(0) == 0);
+	ASSERT(f(1) == 1);
+	ASSERT(f(0xffff) == 0xffff);
+	ASSERT(f(0xfffff) == 0xffff);
+	ASSERT(f(0xf0000) == 0);
+}
+
+int
+main (int argc, char *argv[])
+{
+	return main_helper(argc, argv, run_test);
+}