def test_execute_instruction(self, mock):
nop_instruction = parse_line("nop")
processor = Processor()
processor.execute_instruction(nop_instruction)
self.assertTrue(mock.called)
self.assertEqual(processor.instructions_executed, 1)
def test_execute_instruction(self, mock):
nop_instruction = parse_line("nop")
processor = Processor()
processor.execute_instruction(nop_instruction)
self.assertTrue(mock.called)
self.assertEqual(processor.instructions_executed, 1)
def test_swi_0_functionally_correct(self):
swi_instruction = parse_line("swi #0")
processor = Processor()
processor.execute_instruction(swi_instruction)
self.assertEqual(processor.instructions_executed, 1)
self.assertTrue(processor.halted)
def test_swi_0_functionally_correct(self):
swi_instruction = parse_line("swi #0")
processor = Processor()
processor.execute_instruction(swi_instruction)
self.assertEqual(processor.instructions_executed, 1)
self.assertTrue(processor.halted)
def test_halting(self, mock):
nop_instruction = parse_line("nop")
processor = Processor()
processor.halt()
processor.execute_instruction(nop_instruction)
self.assertFalse(mock.called)
self.assertEqual(processor.instructions_executed, 0)
class ProcessorTestCase(unittest.TestCase):
def setUp(self):
self.cpu = Processor()
def test_fetch_valid_instruction(self):
load_into_memory(self.cpu.memory, ["mov r0, #1", "mov r1, #5"])
inst_1 = self.cpu.fetch_instruction()
self.assertEqual(self.cpu.register_bank.get("pc"), 1)
self.assertEqual(self.cpu.instructions_executed, 0)
self.assertEqual(inst_1.mnemonic, "mov")
self.assertEqual(inst_1.operands[0].value, "r0")
self.assertEqual(inst_1.operands[1].value, 1)
inst_2 = self.cpu.fetch_instruction()
self.assertEqual(self.cpu.register_bank.get("pc"), 2)
self.assertEqual(inst_2.mnemonic, "mov")
self.assertEqual(inst_2.operands[0].value, "r1")
self.assertEqual(inst_2.operands[1].value, 5)
def test_fetch_non_instruction(self):
self.assertRaises(RuntimeError, lambda: self.cpu.fetch_instruction())
@patch.object(xsvm.instructions, 'exec_nop')
def test_execute_instruction(self, mock):
nop_instruction = parse_line("nop")
processor = Processor()
processor.execute_instruction(nop_instruction)
self.assertTrue(mock.called)
self.assertEqual(processor.instructions_executed, 1)
@patch.object(xsvm.instructions, 'exec_nop')
def test_halting(self, mock):
nop_instruction = parse_line("nop")
processor = Processor()
processor.halt()
processor.execute_instruction(nop_instruction)
self.assertFalse(mock.called)
self.assertEqual(processor.instructions_executed, 0)
def test_exiting_on_halt(self):
load_into_memory(self.cpu.memory, ["nop", "nop", "swi #0", "nop"])
self.cpu.execute_until_halted()
self.assertEqual(self.cpu.instructions_executed, 3)
self.assertEqual(self.cpu.register_bank.get("pc"), 3)
class ProcessorTestCase(unittest.TestCase):
def setUp(self):
self.cpu = Processor()
def test_fetch_valid_instruction(self):
load_into_memory(self.cpu.memory, ["mov r0, #1", "mov r1, #5"])
inst_1 = self.cpu.fetch_instruction()
self.assertEqual(self.cpu.register_bank.get("pc"), 1)
self.assertEqual(self.cpu.instructions_executed, 0)
self.assertEqual(inst_1.mnemonic, "mov")
self.assertEqual(inst_1.operands[0].value, "r0")
self.assertEqual(inst_1.operands[1].value, 1)
inst_2 = self.cpu.fetch_instruction()
self.assertEqual(self.cpu.register_bank.get("pc"), 2)
self.assertEqual(inst_2.mnemonic, "mov")
self.assertEqual(inst_2.operands[0].value, "r1")
self.assertEqual(inst_2.operands[1].value, 5)
def test_fetch_non_instruction(self):
self.assertRaises(RuntimeError, lambda: self.cpu.fetch_instruction())
@patch.object(xsvm.instructions, 'exec_nop')
def test_execute_instruction(self, mock):
nop_instruction = parse_line("nop")
processor = Processor()
processor.execute_instruction(nop_instruction)
self.assertTrue(mock.called)
self.assertEqual(processor.instructions_executed, 1)
@patch.object(xsvm.instructions, 'exec_nop')
def test_halting(self, mock):
nop_instruction = parse_line("nop")
processor = Processor()
processor.halt()
processor.execute_instruction(nop_instruction)
self.assertFalse(mock.called)
self.assertEqual(processor.instructions_executed, 0)
def test_exiting_on_halt(self):
load_into_memory(self.cpu.memory, ["nop", "nop", "swi #0", "nop"])
self.cpu.execute_until_halted()
self.assertEqual(self.cpu.instructions_executed, 3)
self.assertEqual(self.cpu.register_bank.get("pc"), 3)
def test_halting(self, mock):
nop_instruction = parse_line("nop")
processor = Processor()
processor.halt()
processor.execute_instruction(nop_instruction)
self.assertFalse(mock.called)
self.assertEqual(processor.instructions_executed, 0)
def setUp(self):
self.cpu = Processor()
def test_swi_unhandled_interrupt(self):
swi_instruction = parse_line("swi #99")
processor = Processor()
self.assertRaises(RuntimeError, lambda : processor.execute_instruction(swi_instruction))
def setUp(self):
self.proc = Processor()
class InstructionsExecutionTestCase(unittest.TestCase):
def setUp(self):
self.proc = Processor()
def test_mov_const_to_reg(self):
instr = parse_line("mov r0, #1")
self.proc.execute_instruction(instr)
self.assertEqual(self.proc.register_bank.get("r0"), 1)
def test_add_const_to_reg(self):
instr_1 = parse_line("mov r1, #5")
instr_2 = parse_line("add r0, r1, #2")
self.proc.execute_instruction(instr_1)
self.proc.execute_instruction(instr_2)
self.assertEqual(self.proc.register_bank.get("r1"), 5)
self.assertEqual(self.proc.register_bank.get("r0"), 7)
def test_sub_const_from_reg(self):
instr_1 = parse_line("mov r1, #5")
instr_2 = parse_line("sub r0, r1, #2")
self.proc.execute_instruction(instr_1)
self.proc.execute_instruction(instr_2)
self.assertEqual(self.proc.register_bank.get("r1"), 5)
self.assertEqual(self.proc.register_bank.get("r0"), 3)
def test_mul_reg_and_const(self):
instr_1 = parse_line("mov r1, #5")
instr_2 = parse_line("mul r0, r1, #2")
self.proc.execute_instruction(instr_1)
self.proc.execute_instruction(instr_2)
self.assertEqual(self.proc.register_bank.get("r1"), 5)
self.assertEqual(self.proc.register_bank.get("r0"), 10)
def test_mul_reg_and_reg(self):
instr_1 = parse_line("mov r1, #5")
instr_2 = parse_line("mov r2, #4")
instr_3 = parse_line("mul r0, r1, r2")
self.proc.execute_instruction(instr_1)
self.proc.execute_instruction(instr_2)
self.proc.execute_instruction(instr_3)
self.assertEqual(self.proc.register_bank.get("r1"), 5)
self.assertEqual(self.proc.register_bank.get("r2"), 4)
self.assertEqual(self.proc.register_bank.get("r0"), 20)
def test_mla_reg_reg_const(self):
instr_1 = parse_line("mov r1, #5")
instr_2 = parse_line("mov r2, #4")
instr_3 = parse_line("mla r0, r1, r2, #3")
self.proc.execute_instruction(instr_1)
self.proc.execute_instruction(instr_2)
self.proc.execute_instruction(instr_3)
self.assertEqual(self.proc.register_bank.get("r1"), 5)
self.assertEqual(self.proc.register_bank.get("r2"), 4)
self.assertEqual(self.proc.register_bank.get("r0"), 23)
def test_cmp(self):
instr_1 = parse_line("mov r0, #5")
instr_2 = parse_line("cmp r0, #3")
self.proc.execute_instruction(instr_1)
self.proc.execute_instruction(instr_2)
self.assertGreater(self.proc.comparison_register, 0)
def test_swi_0_functionally_correct(self):
swi_instruction = parse_line("swi #0")
processor = Processor()
processor.execute_instruction(swi_instruction)
self.assertEqual(processor.instructions_executed, 1)
self.assertTrue(processor.halted)
def test_swi_unhandled_interrupt(self):
swi_instruction = parse_line("swi #99")
processor = Processor()
self.assertRaises(RuntimeError, lambda : processor.execute_instruction(swi_instruction))
def test_beq_not_performed(self):
load_into_memory(self.proc.memory, ["mov r0, #5", "cmp r0, #6", "beq foobar", "nop", "foobar nop"])
self.proc.step()
self.proc.step()
self.proc.step() # beq
self.assertEqual(self.proc.register_bank.get("pc"), 3)
def test_beq_performed(self):
load_into_memory(self.proc.memory, ["mov r0, #5", "cmp r0, #5", "beq foobar", "nop", "foobar nop"])
self.proc.step()
self.proc.step()
self.proc.step() # beq
self.assertEqual(self.proc.register_bank.get("pc"), 4)
def test_bne_not_performed(self):
load_into_memory(self.proc.memory, ["mov r0, #5", "cmp r0, #5", "bne foobar", "nop", "foobar nop"])
self.proc.step()
self.proc.step()
self.proc.step() # bne
self.assertEqual(self.proc.register_bank.get("pc"), 3)
def test_bne_performed(self):
load_into_memory(self.proc.memory, ["mov r0, #5", "cmp r0, #6", "bne foobar", "nop", "foobar nop"])
self.proc.step()
self.proc.step()
self.proc.step() # bne
self.assertEqual(self.proc.register_bank.get("pc"), 4)
def test_blt_not_performed(self):
load_into_memory(self.proc.memory, ["mov r0, #7", "cmp r0, #5", "blt foobar", "nop", "foobar nop"])
self.proc.step()
self.proc.step()
self.proc.step()
self.assertEqual(self.proc.register_bank.get("pc"), 3)
def test_blt_performed(self):
load_into_memory(self.proc.memory, ["mov r0, #5", "cmp r0, #6", "blt foobar", "nop", "foobar nop"])
self.proc.step()
self.proc.step()
self.proc.step()
self.assertEqual(self.proc.register_bank.get("pc"), 4)
def test_bgt_not_performed(self):
load_into_memory(self.proc.memory, ["mov r0, #4", "cmp r0, #5", "bgt foobar", "nop", "foobar nop"])
self.proc.step()
self.proc.step()
self.proc.step()
self.assertEqual(self.proc.register_bank.get("pc"), 3)
def test_bgt_performed(self):
load_into_memory(self.proc.memory, ["mov r0, #8", "cmp r0, #6", "bgt foobar", "nop", "foobar nop"])
self.proc.step()
self.proc.step()
self.proc.step()
self.assertEqual(self.proc.register_bank.get("pc"), 4)
def test_b(self):
load_into_memory(self.proc.memory, ["b foobar", "nop", "foobar nop"])
self.proc.step()
self.assertEqual(self.proc.register_bank.get("pc"), 2)
def test_bl(self):
load_into_memory(self.proc.memory, ["bl foobar", "nop", "foobar nop"])
self.proc.step()
self.assertEqual(self.proc.register_bank.get("lr"), 1)
self.assertEqual(self.proc.register_bank.get("pc"), 2)
def test_push(self):
load_into_memory(self.proc.memory, ["mov r0, #5", "push r0"])
self.proc.step()
self.proc.step()
sp = self.proc.register_bank.get("sp")
self.assertEqual(self.proc.memory.get(sp), 5)
def test_pop(self):
load_into_memory(self.proc.memory, ["mov r0, #5", "mov r1, #9", "push r0", "push r1", "pop r2", "pop r3"])
self.proc.step()
self.proc.step()
self.proc.step()
self.proc.step()
self.proc.step()
self.proc.step()
self.assertEqual(self.proc.register_bank.get("r2"), 9)
self.assertEqual(self.proc.register_bank.get("r3"), 5)
def test_swi_unhandled_interrupt(self):
swi_instruction = parse_line("swi #99")
processor = Processor()
self.assertRaises(
RuntimeError,
lambda: processor.execute_instruction(swi_instruction))
def setUp(self):
self.proc = Processor()
class InstructionsExecutionTestCase(unittest.TestCase):
def setUp(self):
self.proc = Processor()
def test_mov_const_to_reg(self):
instr = parse_line("mov r0, #1")
self.proc.execute_instruction(instr)
self.assertEqual(self.proc.register_bank.get("r0"), 1)
def test_add_const_to_reg(self):
instr_1 = parse_line("mov r1, #5")
instr_2 = parse_line("add r0, r1, #2")
self.proc.execute_instruction(instr_1)
self.proc.execute_instruction(instr_2)
self.assertEqual(self.proc.register_bank.get("r1"), 5)
self.assertEqual(self.proc.register_bank.get("r0"), 7)
def test_sub_const_from_reg(self):
instr_1 = parse_line("mov r1, #5")
instr_2 = parse_line("sub r0, r1, #2")
self.proc.execute_instruction(instr_1)
self.proc.execute_instruction(instr_2)
self.assertEqual(self.proc.register_bank.get("r1"), 5)
self.assertEqual(self.proc.register_bank.get("r0"), 3)
def test_mul_reg_and_const(self):
instr_1 = parse_line("mov r1, #5")
instr_2 = parse_line("mul r0, r1, #2")
self.proc.execute_instruction(instr_1)
self.proc.execute_instruction(instr_2)
self.assertEqual(self.proc.register_bank.get("r1"), 5)
self.assertEqual(self.proc.register_bank.get("r0"), 10)
def test_mul_reg_and_reg(self):
instr_1 = parse_line("mov r1, #5")
instr_2 = parse_line("mov r2, #4")
instr_3 = parse_line("mul r0, r1, r2")
self.proc.execute_instruction(instr_1)
self.proc.execute_instruction(instr_2)
self.proc.execute_instruction(instr_3)
self.assertEqual(self.proc.register_bank.get("r1"), 5)
self.assertEqual(self.proc.register_bank.get("r2"), 4)
self.assertEqual(self.proc.register_bank.get("r0"), 20)
def test_mla_reg_reg_const(self):
instr_1 = parse_line("mov r1, #5")
instr_2 = parse_line("mov r2, #4")
instr_3 = parse_line("mla r0, r1, r2, #3")
self.proc.execute_instruction(instr_1)
self.proc.execute_instruction(instr_2)
self.proc.execute_instruction(instr_3)
self.assertEqual(self.proc.register_bank.get("r1"), 5)
self.assertEqual(self.proc.register_bank.get("r2"), 4)
self.assertEqual(self.proc.register_bank.get("r0"), 23)
def test_cmp(self):
instr_1 = parse_line("mov r0, #5")
instr_2 = parse_line("cmp r0, #3")
self.proc.execute_instruction(instr_1)
self.proc.execute_instruction(instr_2)
self.assertGreater(self.proc.comparison_register, 0)
def test_swi_0_functionally_correct(self):
swi_instruction = parse_line("swi #0")
processor = Processor()
processor.execute_instruction(swi_instruction)
self.assertEqual(processor.instructions_executed, 1)
self.assertTrue(processor.halted)
def test_swi_unhandled_interrupt(self):
swi_instruction = parse_line("swi #99")
processor = Processor()
self.assertRaises(
RuntimeError,
lambda: processor.execute_instruction(swi_instruction))
def test_beq_not_performed(self):
load_into_memory(
self.proc.memory,
["mov r0, #5", "cmp r0, #6", "beq foobar", "nop", "foobar nop"])
self.proc.step()
self.proc.step()
self.proc.step() # beq
self.assertEqual(self.proc.register_bank.get("pc"), 3)
def test_beq_performed(self):
load_into_memory(
self.proc.memory,
["mov r0, #5", "cmp r0, #5", "beq foobar", "nop", "foobar nop"])
self.proc.step()
self.proc.step()
self.proc.step() # beq
self.assertEqual(self.proc.register_bank.get("pc"), 4)
def test_bne_not_performed(self):
load_into_memory(
self.proc.memory,
["mov r0, #5", "cmp r0, #5", "bne foobar", "nop", "foobar nop"])
self.proc.step()
self.proc.step()
self.proc.step() # bne
self.assertEqual(self.proc.register_bank.get("pc"), 3)
def test_bne_performed(self):
load_into_memory(
self.proc.memory,
["mov r0, #5", "cmp r0, #6", "bne foobar", "nop", "foobar nop"])
self.proc.step()
self.proc.step()
self.proc.step() # bne
self.assertEqual(self.proc.register_bank.get("pc"), 4)
def test_blt_not_performed(self):
load_into_memory(
self.proc.memory,
["mov r0, #7", "cmp r0, #5", "blt foobar", "nop", "foobar nop"])
self.proc.step()
self.proc.step()
self.proc.step()
self.assertEqual(self.proc.register_bank.get("pc"), 3)
def test_blt_performed(self):
load_into_memory(
self.proc.memory,
["mov r0, #5", "cmp r0, #6", "blt foobar", "nop", "foobar nop"])
self.proc.step()
self.proc.step()
self.proc.step()
self.assertEqual(self.proc.register_bank.get("pc"), 4)
def test_bgt_not_performed(self):
load_into_memory(
self.proc.memory,
["mov r0, #4", "cmp r0, #5", "bgt foobar", "nop", "foobar nop"])
self.proc.step()
self.proc.step()
self.proc.step()
self.assertEqual(self.proc.register_bank.get("pc"), 3)
def test_bgt_performed(self):
load_into_memory(
self.proc.memory,
["mov r0, #8", "cmp r0, #6", "bgt foobar", "nop", "foobar nop"])
self.proc.step()
self.proc.step()
self.proc.step()
self.assertEqual(self.proc.register_bank.get("pc"), 4)
def test_b(self):
load_into_memory(self.proc.memory, ["b foobar", "nop", "foobar nop"])
self.proc.step()
self.assertEqual(self.proc.register_bank.get("pc"), 2)
def test_bl(self):
load_into_memory(self.proc.memory, ["bl foobar", "nop", "foobar nop"])
self.proc.step()
self.assertEqual(self.proc.register_bank.get("lr"), 1)
self.assertEqual(self.proc.register_bank.get("pc"), 2)
def test_push(self):
load_into_memory(self.proc.memory, ["mov r0, #5", "push r0"])
self.proc.step()
self.proc.step()
sp = self.proc.register_bank.get("sp")
self.assertEqual(self.proc.memory.get(sp), 5)
def test_pop(self):
load_into_memory(self.proc.memory, [
"mov r0, #5", "mov r1, #9", "push r0", "push r1", "pop r2",
"pop r3"
])
self.proc.step()
self.proc.step()
self.proc.step()
self.proc.step()
self.proc.step()
self.proc.step()
self.assertEqual(self.proc.register_bank.get("r2"), 9)
self.assertEqual(self.proc.register_bank.get("r3"), 5)
def setUp(self):
self.cpu = Processor()