add test trap simulator unit test

diff --git a/src/soc/simulator/test_trap_sim.py b/src/soc/simulator/test_trap_sim.py
new file mode 100644 (file)
index 0000000..b69561e
--- /dev/null
+++ b/src/soc/simulator/test_trap_sim.py
@@ -0,0 +1,54 @@
+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 TrapSimTestCases(FHDLTestCase):
+    test_data = []
+
+    def __init__(self, name="div"):
+        super().__init__(name)
+        self.test_name = name
+
+    def test_0_not_twi(self):
+        lst = ["addi 1, 0, 0x5678",
+               "twi  4, 1, 0x5677",
+               ]
+        with Program(lst) as program:
+            self.run_tst_program(program, [1])
+
+    def test_1_twi_eq(self):
+        lst = ["addi 1, 0, 0x5678",
+               "twi  4, 1, 0x5678",
+               ]
+        with Program(lst) as program:
+            self.run_tst_program(program, [1])
+
+    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 TrapDecoderTestCase(DecoderBase, TrapSimTestCases):
+    pass
+
+
+if __name__ == "__main__":
+    unittest.main()