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_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_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_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_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_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_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_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_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_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_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_load_into_memory(self):
source_code = ["mov r0, #1", "mov r1, #5"]
test_memory = Memory()
load_into_memory(test_memory, source_code)
self.assertEqual(test_memory.get(2), 0)
inst_1 = test_memory.get(0)
inst_2 = test_memory.get(1)
self.assertEqual(inst_1.mnemonic, "mov")
self.assertEqual(inst_1.operands[0].value, "r0")
self.assertEqual(inst_1.operands[1].value, 1)
self.assertEqual(inst_2.mnemonic, "mov")
self.assertEqual(inst_2.operands[0].value, "r1")
self.assertEqual(inst_2.operands[1].value, 5)
def test_load_into_memory(self):
source_code = ["mov r0, #1", "mov r1, #5"]
test_memory = Memory()
load_into_memory(test_memory, source_code)
self.assertEqual(test_memory.get(2), 0)
inst_1 = test_memory.get(0)
inst_2 = test_memory.get(1)
self.assertEqual(inst_1.mnemonic, "mov")
self.assertEqual(inst_1.operands[0].value, "r0")
self.assertEqual(inst_1.operands[1].value, 1)
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_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)
