def test_Assembler_data_seg():
test_string = """
dc 42
add r1, r1
somearray ds 4
add r2, r2
somevar dc 4
add r3, r3
"""
asm = Assembler("data seg test", test_string)
binary = asm.build_binary()
eq_(len(binary.code_seg), 3)
eq_(binary.data_seg.to_list(), [42, 0, 0, 0, 0, 4])
eq_(binary.symbol_table, {"somearray": 4, "somevar": 8})
def test_Assembler_labels():
test_string = """
foo equ 42
load r1, =foo
testlabel load r1, =42
load r2, =testlabel
load r2, =1
"""
asm = Assembler("label test", test_string)
binary = asm.build_binary()
eq_(len(binary.code_seg), 4)
eq_(binary.code_seg[0], binary.code_seg[1])
eq_(binary.code_seg[2], binary.code_seg[3])
eq_(binary.symbol_table, {"foo": 42, "testlabel": 1})
def test_Assembler_basic_instructions():
test_string = """
add r1, 1(r2) ; a basic instruction
nop ; instruction with no operands
popr sp ; instruction with only one operand
"""
asm = Assembler("test file", test_string)
binary = asm.build_binary()
eq_(len(asm.code_seg), 3)
eq_(asm.code_seg[0], Insn(Opcodes.ADD, 1, AddressModes.DIRECT, 2, 1))
eq_(asm.code_seg[1].opcode, Opcodes.NOP)
eq_(asm.code_seg[2].opcode, Opcodes.POPR)
eq_(asm.code_seg[2].rj, Registers.SP)
eq_(len(binary.code_seg), 3)
eq_(binary.code_seg[0], 287965185)
eq_(binary.code_seg[1], 524288)
eq_(binary.code_seg[2], 919076864)
def test_Assembler_exceptional_address_modes():
test_string = """
; check that address mode is correct for these two
pop sp, r0
mul r1, @r2
store r2, 42
jump r5, @r4
"""
asm = Assembler("addr mode test file", test_string)
binary = asm.build_binary()
eq_(len(asm.code_seg), 4)
eq_(asm.code_seg[0], Insn(Opcodes.POP, Registers.SP, AddressModes.IMMEDIATE, Registers.R0, 0))
eq_(asm.code_seg[1], Insn(Opcodes.MUL, 1, AddressModes.DIRECT, Registers.R2, 0))
eq_(asm.code_seg[2], Insn(Opcodes.STORE, 2, 0, 0, 42))
eq_(asm.code_seg[3], Insn(Opcodes.JUMP, 5, 0, 4, 0))
eq_(len(binary.code_seg), 4)
eq_(binary.code_seg[0], 884998144)
eq_(binary.code_seg[1], 321519616)
eq_(binary.code_seg[2], 20971562)
eq_(binary.code_seg[3], 547618816)