From 5cded455d5aeb960aaef96c67d8e7e57907226b5 Mon Sep 17 00:00:00 2001
From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Mon, 6 Jul 2020 19:56:33 +0100
Subject: [PATCH] add first simulator mul test

---
 src/soc/simulator/test_mul_sim.py | 46 +++++++++++++++++++++++++++++++
 src/soc/simulator/test_sim.py     |  2 +-
 2 files changed, 47 insertions(+), 1 deletion(-)
 create mode 100644 src/soc/simulator/test_mul_sim.py

diff --git a/src/soc/simulator/test_mul_sim.py b/src/soc/simulator/test_mul_sim.py
new file mode 100644
index 00000000..9291207e
--- /dev/null
+++ b/src/soc/simulator/test_mul_sim.py
@@ -0,0 +1,46 @@
+from nmigen import Module, Signal
+from nmigen.back.pysim import Simulator, Delay, Settle
+from nmigen.test.utils import FHDLTestCase
+import unittest
+from soc.decoder.power_decoder import (create_pdecode)
+from soc.decoder.power_enums import (Function, InternalOp,
+                                     In1Sel, In2Sel, In3Sel,
+                                     OutSel, RC, LdstLen, CryIn,
+                                     single_bit_flags, Form, SPR,
+                                     get_signal_name, get_csv)
+from soc.decoder.power_decoder2 import (PowerDecode2)
+from soc.simulator.program import Program
+from soc.simulator.qemu import run_program
+from soc.decoder.isa.all import ISA
+from soc.fu.test.common import TestCase
+from soc.simulator.test_sim import DecoderBase
+
+
+
+class MulTestCases(FHDLTestCase):
+    test_data = []
+
+    def __init__(self, name="div"):
+        super().__init__(name)
+        self.test_name = name
+
+    def test_mullw(self):
+        lst = [f"addi 1, 0, 0x5678",
+               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
+        tc = TestCase(prog, self.test_name, initial_regs, initial_sprs, 0,
+                                            initial_mem, 0)
+        self.test_data.append(tc)
+
+
+class MulDecoderTestCase(DecoderBase, MulTestCases):
+    pass
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/src/soc/simulator/test_sim.py b/src/soc/simulator/test_sim.py
index a619ba1b..f6a52fc9 100644
--- a/src/soc/simulator/test_sim.py
+++ b/src/soc/simulator/test_sim.py
@@ -255,7 +255,7 @@ class DecoderBase:
         prog.reset()
         with run_program(prog, initial_mem) as q:
             self.qemu_register_compare(simulator, q, reglist)
-            self.qemu_mem_compare(simulator, q, reglist)
+            self.qemu_mem_compare(simulator, q, True)
         print(simulator.gpr.dump())
 
     def qemu_mem_compare(self, sim, qemu, check=True):
-- 
2.30.2