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MatchFunction.py
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MatchFunction.py
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from Constants import *
from Commands import *
from Parser import Parser
def output_command16(cmd: Command16):
funct3 = cmd.funct3
opcode = cmd.opcode
nm = ""
try:
match opcode:
case "00":
rs2 = reg_rvc[int(cmd.get_bits(2, 4), 2)]
rs1 = reg_rvc[int(cmd.get_bits(7, 9), 2)]
uimm = int(cmd.get_bits(5, 5) + cmd.get_bits(10, 12) +
cmd.get_bits(6, 6), 2) * 4
match funct3:
case "000":
imm = int(cmd.get_bits(7, 10) + cmd.get_bits(11, 12) +
cmd.get_bits(5, 5) + cmd.get_bits(6, 6), 2) * 4
if imm == 0:
return unknown
nm = "c.addi4spn"
rd = reg_rvc[int(cmd.get_bits(2, 4), 2)]
return f"{nm} {rd}, sp, {imm}", False, None
case "010":
nm = "c.lw"
case "110":
nm = "c.sw"
case _:
return unknown
return f"{nm} {rs2}, {uimm}({rs1})", False, None
case "01":
match funct3:
case "000":
if int(cmd.get_bits(7, 11), 2) == 0:
nm = "c.nop"
return nm, False, None
else:
nm = "c.addi"
rs1 = reg[int(cmd.get_bits(7, 11), 2)]
imm = int(cmd.get_bits(2, 6), 2) - \
int(cmd.get_bits(12, 12)) * 32
return f"{nm} {rs1}, {imm}", False, None
case "001":
nm = "c.jal"
offset = int(cmd.get_bits(8, 8) + cmd.get_bits(10, 10) +
cmd.get_bits(9, 9) + cmd.get_bits(6, 6) + cmd.get_bits(7, 7) +
cmd.get_bits(2, 2) + cmd.get_bits(11, 11) + cmd.get_bits(3, 5), 2) * 2 - int(cmd.get_bits(12, 12)) * 2048
return f"{nm}", True, offset
case "010":
nm = "c.li"
rd = reg[int(cmd.get_bits(7, 11), 2)]
imm = int(cmd.get_bits(2, 6), 2) - \
32 * int(cmd.get_bits(12, 12))
return f"{nm} {rd}, {imm}", False, None
case "011":
match int(cmd.get_bits(7, 11), 2):
case 2:
nm = "c.addi16sp"
nzimm = int(cmd.get_bits(3, 4) + cmd.get_bits(5, 5) + cmd.get_bits(
2, 2) + cmd.get_bits(6, 6), 2) * 16 - 512 * int(cmd.get_bits(12, 12))
return f"{nm} sp, {nzimm}", False, None
case 0:
return unknown
case _:
nzimm = int(cmd.get_bits(12, 12) +
cmd.get_bits(2, 6), 2) * 4096
rd = reg[int(cmd.get_bits(7, 11), 2)]
return f"c.lui {rd}, {nzimm}", False, None
case "100":
nzuimm = int(cmd.get_bits(12, 12) +
cmd.get_bits(2, 6), 2)
rd = reg_rvc[int(cmd.get_bits(7, 9), 2)]
imm = int(cmd.get_bits(2, 6), 2) - \
int(cmd.get_bits(12, 12)) * 32
match cmd.get_bits(10, 11):
case "00":
return "c.srli {rd}, {nzuimm}".format(nzuimm=nzuimm, rd=rd)
case "01":
return "c.srai {rd}, {nzuimm}".format(nzuimm=nzuimm, rd=rd)
case "10":
return "c.andi {rd}, {imm}".format(imm=imm, rd=rd)
case "11":
match cmd.get_bits(5, 6):
case "00": nm = "c.sub"
case "01": nm = "c.xor"
case "10": nm = "c.or"
case "11": nm = "c.and"
rs2 = reg_rvc[int(cmd.get_bits(2, 4), 2)]
rs1 = reg_rvc[int(cmd.get_bits(7, 9), 2)]
# rs1 = rd
return f"{nm} {rs1}, {rs2}", False, None
case "101":
nm = "c.j"
offset = int(cmd.get_bits(8, 8) + cmd.get_bits(10, 10) +
cmd.get_bits(9, 9) + cmd.get_bits(6, 6) + cmd.get_bits(7, 7) +
cmd.get_bits(2, 2) + cmd.get_bits(11, 11) + cmd.get_bits(3, 5), 2) * 2 - int(cmd.get_bits(12, 12)) * 2048
return f"{nm}", True, offset
case "110":
offset = int(cmd.get_bits(12, 12) + cmd.get_bits(5, 6) +
cmd.get_bits(2, 2) + cmd.get_bits(10, 11) + cmd.get_bits(3, 4), 2) * 2 - 2 * 256 * int(cmd.get_bits(12, 12))
rs1 = reg_rvc[int(cmd.get_bits(7, 9), 2)]
return f"c.beqz {rs1}", True, offset
case "111":
offset = int(cmd.get_bits(12, 12) + cmd.get_bits(5, 6) +
cmd.get_bits(2, 2) + cmd.get_bits(10, 11) + cmd.get_bits(3, 4), 2) * 2 - 2 * 256 * int(cmd.get_bits(12, 12))
rs1 = reg_rvc[int(cmd.get_bits(7, 9), 2)]
return f"c.bnez {rs1}", True, offset
case _:
return unknown
case "10":
match funct3:
case "000":
rs1 = reg[int(cmd.get_bits(7, 11), 2)]
nzuimm = int(cmd.get_bits(12, 12) +
cmd.get_bits(2, 6), 2)
return f"c.slli {rs1}, {nzuimm}", False, None
case "010":
rd = reg[int(cmd.get_bits(7, 11), 2)]
uimm = int(cmd.get_bits(2, 3) + cmd.get_bits(12,
12) + cmd.get_bits(4, 6), 2) * 4
return f"c.lwsp {rd}, {uimm}(sp)", False, None
case "100":
match int(cmd.get_bits(2, 6), 2):
case 0:
match int(cmd.get_bits(7, 11)):
case 0:
return "c.ebreak", False, None
case _:
rs1 = reg[int(cmd.get_bits(7, 11), 2)]
if cmd.get_bits(12, 12) == "0":
return f"c.jr {rs1}", False, None
else:
return f"c.jalr {rs1}", False, None
case _:
rd = reg[int(cmd.get_bits(7, 11), 2)]
rs2 = reg[int(cmd.get_bits(2, 6), 2)]
if cmd.get_bits(12, 12) == "0":
nm = "c.mv"
else:
nm = "c.add"
return f"{nm} {rd}, {rs2}", False, None
case "110":
nm = "c.swsp"
uimm = int(cmd.get_bits(7, 8) +
cmd.get_bits(9, 12), 2) * 4
rs2 = reg[int(cmd.get_bits(2, 6), 2)]
return f"{nm} {rs2}, {uimm}(sp)", False, None
case _:
unknown
case _:
return unknown
except KeyError:
return unknown
def output_command32(cmd: Command32):
rd = cmd.rd
imm = int(cmd.imm, 2) - 2 * 2048 * int(cmd.get_bits(31, 31))
rs1 = cmd.rs1
try:
match cmd.opcode:
case "0110111":
temp_imm = int(cmd.get_bits(12, 31), 2) * 4096
return "lui {rd}, {imm}".format(rd=reg[rd], imm=temp_imm), False, None
case "0010111":
temp_imm = int(cmd.get_bits(12, 30), 2) * 4096 - \
int(cmd.get_bits(31, 31)) * int(2 ** 31)
return "auipc {rd}, {imm}".format(rd=reg[rd], imm=temp_imm), False, None
case "1101111":
nm = ""
temp_imm = int(cmd.get_bits(31, 31) + cmd.get_bits(12, 19) +
cmd.get_bits(20, 20) + cmd.get_bits(21, 30), 2) * 2 - (1 << 21) * int(cmd.get_bits(31, 31))
return "jal {rd}".format(rd=reg[rd]), True, temp_imm
case "1100111":
rs1 = cmd.rs1
temp_imm = imm
return "jalr {rd}, {imm}({rs1})".format(rs1=reg[rs1], rd=reg[rd], imm=temp_imm), False, None
case "1100011":
nm = ""
match cmd.funct3:
case "000": nm = "beq"
case "001": nm = "bne"
case "100": nm = "blt"
case "101": nm = "bge"
case "110": nm = "bltu"
case "111": nm = "bgeu"
case _: return unknown
temp_imm = int(cmd.get_bits(31, 31) + cmd.get_bits(7, 7)
+ cmd.get_bits(25, 30) + cmd.get_bits(8, 11), 2) * 2 - 4096 * 2 * int(cmd.get_bits(31, 31))
rs2 = int(cmd.get_bits(20, 24), 2)
return "{nm} {rs1}, {rs2}".format(nm=nm, rs1=reg[rs1], rs2=reg[rs2]), True, temp_imm
case "0000011":
nm = ""
match cmd.funct3:
case "000": nm = "lb"
case "001": nm = "lh"
case "010": nm = "lw"
case "100": nm = "lbu"
case "101": nm = "lhu"
case _: return unknown
return "{name} {rd}, {imm}({rs1})".format(name=nm, rs1=reg[cmd.rs1], rd=reg[rd], imm=imm), False, None
case "0100011":
nm = ""
temp_imm_1 = -4096 * int(cmd.get_bits(31, 31)) \
+ int(cmd.get_bits(25, 31) + cmd.get_bits(7, 11), 2)
rs2 = int(cmd.get_bits(20, 24), 2)
match cmd.funct3:
case "000": nm = "sb"
case "001": nm = "sh"
case "010": nm = "sw"
return "{name} {rs2}, {imm1}({rs1})".format(
name=nm,
rs1=reg[rs1],
rs2=reg[rs2],
imm1=temp_imm_1), False, None
case "0010011":
nm = ""
match cmd.funct3:
case "000": nm = "addi"
case "010": nm = "slti"
case "011": nm = "sltiu"
case "100": nm = "xori"
case "110": nm = "ori"
case "111": nm = "andi"
case "001": nm = "slli"
case "101":
if cmd.get_bits(30, 30) == "0":
nm = "srli"
imm = int(cmd.get_bits(20, 25), 2)
else:
nm = "srai"
imm = int(cmd.get_bits(20, 25), 2)
return "{nm} {rd}, {rs1}, {imm}".format(nm=nm, rs1=reg[rs1], rd=reg[rd], imm=imm), False, None
case "0110011":
nm = ""
rs2 = int(cmd.get_bits(20, 24), 2)
if cmd.get_bits(25, 31) == "0000001":
match cmd.funct3:
case "000": nm = "mul"
case "001": nm = "mulh"
case "010": nm = "mulhsu"
case "011": nm = "mulhu"
case "100": nm = "div"
case "101": nm = "divu"
case "110": nm = "rem"
case "111": nm = "remu"
else:
match cmd.funct3:
case "000":
if cmd.get_bits(30, 30) == "0":
nm = "add"
else:
nm = "sub"
case "001": nm = "sll"
case "010": nm = "slt"
case "011": nm = "sltu"
case "100": nm = "xor"
case "101":
if cmd.get_bits(30, 30) == "0":
nm = "srl"
else:
nm = "sra"
case "110": nm = "or"
case "111": nm = "and"
return "{nm} {rd}, {rs1}, {rs2}".format(
nm=nm,
rs1=reg[rs1],
rs2=reg[rs2],
rd=reg[rd]), False, None
case "1110011":
nm = ""
uimm = rs1
csr = int(cmd.get_bits(20, 31), 2)
match cmd.funct3:
case "000":
if cmd.get_bits(20, 20) == "0":
nm = "ecall"
else:
nm = "ebreak"
return f"{nm}", False, None
case "001":
return "csrrw {rd}, {csr}, {rs1}".format(rd=reg[rd], csr=reg_csr[csr], rs1=reg[uimm]), False, None
case "010":
return "csrrs {rd}, {csr}, {rs1}".format(rd=reg[rd], csr=reg_csr[csr], rs1=reg[uimm]), False, None
case "011":
return "csrrc {rd}, {csr}, {rs1}".format(rd=reg[rd], csr=reg_csr[csr], rs1=reg[uimm]), False, None
case "101":
return "csrrwi {rd}, {csr}, {uimm}".format(rd=reg[rd], csr=reg_csr[csr], uimm=uimm), False, None
case "110":
return "csrrsi {rd}, {csr}, {uimm}".format(rd=reg[rd], csr=reg_csr[csr], uimm=uimm), False, None
case "111":
return "csrrci {rd}, {csr}, {uimm}".format(rd=reg[rd], csr=reg_csr[csr], uimm=uimm), False, None
case _:
return unknown
case _:
return unknown
except KeyError as e:
return unknown
def parse_command(start: int, parser: Parser) -> str:
first_byte = parser.get_bytes(start, 1)
first_bits = (first_byte % 2) + (first_byte // 2) % 2
if first_bits == 2:
command = parser.get_command(parser.get_bytes(start, 4), 32)
return *output_command32(command), 4
else:
command = parser.get_command(parser.get_bytes(start, 4), 16)
return *output_command16(command), 2