add mullw test to qemu sim

diff --git a/src/soc/simulator/test_mul_sim.py b/src/soc/simulator/test_mul_sim.py
index 9291207e18ef121cd375654a9d32b8c224654693..be95df68514d264930cbd36ad7abe3403da2ea5e 100644 (file)
--- a/src/soc/simulator/test_mul_sim.py
+++ b/src/soc/simulator/test_mul_sim.py
@@ -30,6 +30,13 @@ class MulTestCases(FHDLTestCase):
                f"mullw 3, 1, 2"]
         self.run_tst_program(Program(lst), [3])
 
+    def test_mullw(self):
+        lst = [f"addi 1, 0, 0x5678",
+                "neg 1, 1",
+               f"addi 2, 0, 0x1234",
+               f"mullw 3, 1, 2"]
+        self.run_tst_program(Program(lst), [3])
+
     def run_tst_program(self, prog, initial_regs=None, initial_sprs=None,
                                     initial_mem=None):
         initial_regs = [0] * 32