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#! /usr/bin/env python
###############################################################################
#
# simulavr - A simulator for the Atmel AVR family of microcontrollers.
# Copyright (C) 2001, 2002 Theodore A. Roth
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
###############################################################################
#
# $Id: test_RCALL.py,v 1.1 2002/03/26 05:26:54 troth Exp $
#
"""Test the RCALL opcode.
"""
import base_test
from registers import Reg
class RCALL_TestFail(base_test.TestFail): pass
class base_RCALL(base_test.opcode_stack_test):
"""Generic test case for testing RCALL opcode.
The derived class must provide the reg member and the fail method.
RCALL - Relative call to subroutine
PC <- PC + k + 1
STACK <- PC + 1
SP <- SP - 2 __or__ SP <- SP - 3
(2 bytes, 16 bit PC) (3 bytes, 22 bit PC)
opcode is '1101 kkkk kkkk kkkk' -2K <= k < 2K
"""
def setup(self):
self.setup_regs[Reg.PC] = 0xff * 2
return 0xD000 | (self.k & 0x0fff)
def analyze_results(self):
self.reg_changed.append( Reg.SP )
self.is_pc_checked = 1
expect = self.setup_regs[Reg.PC]/2 + self.k + 1
got = self.anal_regs[Reg.PC] / 2
if expect != got:
self.fail('RCALL failed: expect=%x, got=%x' % (expect, got))
expect = self.setup_regs[Reg.SP] - 2 # 16 bit PC
got = self.anal_regs[Reg.SP]
if got != expect:
self.fail('RCALL stack push failed: expect=%04x, got=%04x' % (
expect, got ))
#
# Template code for test case.
# The fail method will raise a test specific exception.
#
template = """
class RCALL_%03x_TestFail(RCALL_TestFail): pass
class test_RCALL_%03x(base_RCALL):
k = 0x%x
def fail(self,s):
raise RCALL_%03x_TestFail, s
"""
#
# automagically generate the test_RCALL_* class definitions
#
# FIXME: TRoth 2002-02-22: Really need to check jumps which wrap around the
# ends of flash memory. Will need to know the size of the device's flash space
# to do that though.
#
code = ''
for k in (-100,100):
code += template % ((k & 0xfff), (k & 0xfff), k, (k & 0xfff))
exec code
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