1 files changed, 27 insertions, 0 deletions
diff --git a/libguile/lightening/tests/subr_d.c b/libguile/lightening/tests/subr_d.c
new file mode 100644
index 000000000..bc611c52e
--- /dev/null
+++ b/libguile/lightening/tests/subr_d.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_2(j, jit_operand_fpr (JIT_OPERAND_ABI_DOUBLE, JIT_F0),
+                  jit_operand_fpr (JIT_OPERAND_ABI_DOUBLE, JIT_F1));
+
+  jit_subr_d(j, JIT_F0, JIT_F0, JIT_F1);
+  jit_leave_jit_abi(j, 0, 0, align);
+  jit_retr_d(j, JIT_F0);
+
+  size_t size = 0;
+  void* ret = jit_end(j, &size);
+
+  double (*f)(double, double) = ret;
+  ASSERT(f(42., 69.) == -27.);
+  ASSERT(f(42., 69.5) == -27.5);
+}
+
+int
+main (int argc, char *argv[])
+{
+  return main_helper(argc, argv, run_test);
+}