#-
# Copyright (c) 2011 Robert N. M. Watson
# All rights reserved.
#
# This software was developed by SRI International and the University of
# Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
# ("CTSRD"), as part of the DARPA CRASH research programme.
#
# @BERI_LICENSE_HEADER_START@
#
# Licensed to BERI Open Systems C.I.C. (BERI) under one or more contributor
# license agreements.  See the NOTICE file distributed with this work for
# additional information regarding copyright ownership.  BERI licenses this
# file to you under the BERI Hardware-Software License, Version 1.0 (the
# "License"); you may not use this file except in compliance with the
# License.  You may obtain a copy of the License at:
#
#   http://www.beri-open-systems.org/legal/license-1-0.txt
#
# Unless required by applicable law or agreed to in writing, Work distributed
# under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
# CONDITIONS OF ANY KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations under the License.
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# @BERI_LICENSE_HEADER_END@
#

from beritest_tools import BaseBERITestCase
from nose.plugins.attrib import attr

class test_tnei_gt(BaseBERITestCase):
    @attr('trapi')
    def test_epc(self):
        self.assertRegisterEqual(self.MIPS.a0, self.MIPS.a5, "Unexpected EPC")

    @attr('trapi')
    def test_returned(self):
        self.assertRegisterEqual(self.MIPS.a1, 1, "flow broken by tnei instruction")

    @attr('trapi')
    def test_handled(self):
        self.assertRegisterEqual(self.MIPS.a2, 1, "tnei exception handler not run")

    @attr('trapi')
    def test_exl_in_handler(self):
        self.assertRegisterEqual((self.MIPS.a3 >> 1) & 0x1, 1, "EXL not set in exception handler")

    @attr('trapi')
    def test_cause_bd(self):
        self.assertRegisterEqual((self.MIPS.a4 >> 31) & 0x1, 0, "Branch delay (BD) flag improperly set")

    @attr('trapi')
    def test_cause_code(self):
        self.assertRegisterEqual((self.MIPS.a4 >> 2) & 0x1f, 13, "Code not set to Tr")

    @attr('trapi')
    def test_not_exl_after_handler(self):
        self.assertRegisterEqual((self.MIPS.a6 >> 1) & 0x1, 0, "EXL still set after ERET")
