def jal(operands, label_dict, line_num):
"""
Operation : %ra <- %pc + 1; %pc <- addr;
Format : [ 000011 | addr ]
"""
inst_bin = "000011" + Parser.parse_operand(operands[0], Operandtype.LABEL_ABSOLUTE, label_dict)[1]
return utils.bin2bytes(inst_bin)
def out(operands, label_dict, line_num):
"""
Operation : RS232C receiver
Format : [ 011011 | 00000 | %rt | -----(16bit) ]
"""
inst_bin = (
"01101100000" + Parser.parse_operand(operands[0], Operandtype.REGISTER_DIRECT)[0] + "0000000000000000"
)
return utils.bin2bytes(inst_bin)
def bclf(operands, label_dict, line_num):
"""
Operation : if(!FPCond) %pc <- %pc + 1 + $addr;
Format : [ 010001 | 01000 | 00000 | $addr ]
"""
inst_bin = (
"0100010100000000" + Parser.parse_operand(operands[0], Operandtype.LABEL_RELATIVE, label_dict, line_num)[1]
)
return utils.bin2bytes(inst_bin)
def jral(operands, label_dict, line_num):
"""
Operation : %ra <- %pc + 1; %pc <- %rs
Format : [ 000000 | %rs | --- | --- | --- | 001001 ]
"""
inst_bin = (
"000000" + Parser.parse_operand(operands[0], Operandtype.REGISTER_DIRECT)[0] + "000000000000000001001"
)
return utils.bin2bytes(inst_bin)
def bne(operands, label_dict, line_num):
"""
Operation : if(%rs != %rt) %pc <- %pc + 1 + addr
Format : [ 000101 | %rs | %rt | addr ]
"""
inst_bin = (
"000101"
+ Parser.parse_operand(operands[0], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[1], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[2], Operandtype.LABEL_RELATIVE, label_dict, line_num)[1]
)
return utils.bin2bytes(inst_bin)
def andi(operands, label_dict, line_num):
"""
Operation : %rt <- %rs & $imm
Format : [ 001100 | %rs | %rt | $imm ]
"""
inst_bin = (
"001100"
+ Parser.parse_operand(operands[1], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[0], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[2], Operandtype.IMMEDIATE)[1]
)
return utils.bin2bytes(inst_bin)
def fle(operands, label_dict, line_num):
"""
Operation : FPcond = (%fs <= %ft) ? 1 : 0
Format : [ 010001 | 10000 | %ft | %fs | --- | 111110 ]
"""
inst_bin = (
"01000110000"
+ Parser.parse_operand(operands[1], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[0], Operandtype.REGISTER_DIRECT)[0]
+ "00000111110"
)
return utils.bin2bytes(inst_bin)
def fsw(operands, label_dict, line_num):
"""
Operation : Mem[%rs + $imm] <- %ft
Format : [ 111001 | %rs | %ft | $imm ]
"""
inst_bin = (
"111001"
+ Parser.parse_operand(operands[1], Operandtype.REGISTER_INDIRECT)[0]
+ Parser.parse_operand(operands[0], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[1], Operandtype.REGISTER_INDIRECT, label_dict)[1]
)
return utils.bin2bytes(inst_bin)
def and_(operands, label_dict, line_num):
"""
Operation : %rd <- %rs & %rt
Format : [ 000000 | %rd | %rs | %rt | --- | 100001 ]
"""
inst_bin = (
"000000"
+ Parser.parse_operand(operands[1], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[2], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[0], Operandtype.REGISTER_DIRECT)[0]
+ +"00000100001"
)
return utils.bin2bytes(inst_bin)
def fsub(operands, label_dict, line_num):
"""
Operation : %fd <- %fs -. %ft
Format : [ 010001 | 10000 | %ft | %fs | %fd | 000001 ]
"""
inst_bin = (
"01000110000"
+ Parser.parse_operand(operands[2], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[1], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[0], Operandtype.REGISTER_DIRECT)[0]
+ "000001"
)
return utils.bin2bytes(inst_bin)
def slt(operands, label_dict, line_num):
"""
Operation : %rd <- (%rs < %rt) ? 1 : 0
Format : [ 000000 | %rs | %rt | %rd | --- | 101010 ]
"""
inst_bin = (
"000000"
+ Parser.parse_operand(operands[1], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[2], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[0], Operandtype.REGISTER_DIRECT)[0]
+ "00000101010"
)
return utils.bin2bytes(inst_bin)
def sll(operands, label_dict, line_num):
"""
Operation : %rd <- %rs << shamt
Format : [ 000000 | %rs | --- | %rd | shamt | 000000 ]
"""
inst_bin = (
"000000"
+ Parser.parse_operand(operands[1], Operandtype.REGISTER_DIRECT)[0]
+ "00000"
+ Parser.parse_operand(operands[0], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[2], Operandtype.SHAMT)[1]
+ "000000"
)
return utils.bin2bytes(inst_bin)
def srl(operands, label_dict, line_num):
"""
Operation : %rd <- %rs >> shamt
Format : [ 000000 | %rs | --- | %rd | shamt | 000010 ]
"""
opecode_bin = format(int("0", 16), "06b")
funct_bin = format(int("02", 16), "06b")
inst_bin = (
"000000"
+ Parser.parse_operand(operands[1], Operandtype.REGISTER_DIRECT)[0]
+ "00000"
+ Parser.parse_operand(operands[0], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[2], Operandtype.SHAMT)[1]
+ "000010"
)
return utils.bin2bytes(inst_bin)
def addi(operands, label_dict, line_num):
"""
Operation : %rt <- %rs + $imm
Format : [ 001000 | %rs | %rt | $imm ]
"""
imm_pattern = re.compile(r"\$-?\d+")
match = imm_pattern.match(operands[2])
if match is not None:
imm_bin = Parser.parse_operand(operands[2], Operandtype.IMMEDIATE)[1]
else:
# operand may be label
imm_bin = utils.imm2bin(label_dict[operands[2]])
assert len(imm_bin) <= 16, "too large integer operand"
inst_bin = (
"001000"
+ Parser.parse_operand(operands[1], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[0], Operandtype.REGISTER_DIRECT)[0]
+ imm_bin
)
return utils.bin2bytes(inst_bin)
def flw(operands, label_dict, line_num):
"""
Operation : %ft <- Mem[%rs + $imm]
Format : [ 110001 | %rs | %ft | $imm ]
"""
addressing_pattern = re.compile(r"(-?\d+)?\(.*\)")
match = addressing_pattern.match(operands[1])
if match is not None:
# use addressing mode
inst_bin = (
"110001"
+ Parser.parse_operand(operands[1], Operandtype.REGISTER_INDIRECT)[0]
+ Parser.parse_operand(operands[0], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[1], Operandtype.REGISTER_INDIRECT)[1]
)
else:
# loading address value
inst_bin = (
"11000100000"
+ Parser.parse_operand(operands[0], Operandtype.REGISTER_DIRECT)[0]
+ Parser.parse_operand(operands[1], Operandtype.LABEL_RELATIVE, label_dict)[1]
)
return utils.bin2bytes(inst_bin)
def hlt(operands, label_dict, line_num):
inst_bin = "11111111111111111111111111111111"
return utils.bin2bytes(inst_bin)