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from tokenizer import tokenize
def format_asm_row(asm: str) -> str:
if not (asm.startswith("@") or asm.startswith(";")) and not asm.startswith(" ") and len(asm) > 0:
return " " + asm
else:
return asm
class Optimizer:
def __init__(self):
pass
def optimize(self, asm_str: str):
asm = asm_str.split("\n")
asm = [row.strip() for row in asm]
asm = [self.strip_comment(row) for row in asm]
asm = [row for row in asm if not len(row) == 0]
asm = [tokenize(row, retain_curlies=True) for row in asm]
asm = self.compact_spu_spo_pattern(asm)
# TODO: not safe when setting loading SP and FP
# ldr RA SP
# mov RA FP
# gets optimized to
# ldr RA FP
#asm = self.compact_target_mov_pattern(asm)
#asm = self.compact_target_mov_pattern(asm)
# TODO: not safe at all. E.g. breaks a while True: pass loop
#asm = self.compact_mov_source_pattern(asm)
#asm = self.compact_mov_source_pattern(asm)
asm = self.compact_spu_load_spo_pattern(asm)
# asm = self.convert_alr_to_ali(asm)
result = "\n".join([format_asm_row(" ".join(row)) for row in asm])
return result
def strip_comment(self, row: str):
ret: str = ""
for c in row:
if c == ";": break
ret += c
return ret
def compact_spu_spo_pattern(self, asm: list[list[str]]) -> list[list[str]]:
i = 0
result: list[list[str]] = []
while i < len(asm):
current = asm[i]
next = asm[i + 1] if i + 1 < len(asm) else None
i += 1
if current[0].startswith("@") or next is None:
result.append(current)
continue
if current[0] == "spu" and next[0] == "spo":
print("=== compact_spu_spo_pattern")
print(current)
print(next)
arg_current = current[1]
arg_next = next[1]
print("=== arg_current:", arg_current)
print("=== arg_next:", arg_next)
if arg_current == arg_next:
print("=== pass")
pass # remove both spu and spo
else:
print("=== mov")
mov = ["mov", arg_current, arg_next]
result.append(mov)
print("=== mov:", mov)
print("=== last of result:", result[len(result) - 1])
print()
i += 1
continue
result.append(current)
return result
def compact_target_mov_pattern(self, asm: list[list[str]]) -> list[list[str]]:
ops_with_target = ["ldi", "ldr", "add", "sub", "addi", "subi", "and", "or", "xor", "sll", "slr", "sar", "slli", "slri", "sari", "inc", "dec", "mov", "ali", "alr", "lpc"]
i = 0
result: list[list[str]] = []
while i < len(asm):
current = asm[i]
next = asm[i + 1] if i + 1 < len(asm) else None
i += 1
if current[0].startswith("@") or next is None:
result.append(current)
continue
if current[0] in ops_with_target and next[0] == "mov":
op_op, op_operands, op_target_reg = current[0], current[1:len(current) - 1], current[len(current) - 1]
mov_from_reg, mov_to_reg = next[1], next[2]
if op_target_reg == mov_from_reg:
ret = [op_op, *op_operands, mov_to_reg]
result.append(ret)
i += 1
continue
result.append(current)
return result
def compact_mov_source_pattern(self, asm: list[list[str]]) -> list[list[str]]:
ops_with_source = ["str", "ldr", "add", "sub", "addi", "subi", "and", "or", "xor", "sll", "slr", "sar", "slli", "slri", "sari", "mov", "ali", "alr"]
i = 0
result: list[list[str]] = []
while i < len(asm):
current = asm[i]
next = asm[i + 1] if i + 1 < len(asm) else None
i += 1
if current[0].startswith("@") or next is None:
result.append(current)
continue
if current[0] == "mov" and next[0] in ops_with_source:
mov_from_reg, mov_to_reg = current[1], current[2]
op_op, op_source_reg, op_operands = next[0], next[1], next[2:]
if op_source_reg == mov_to_reg:
ret = [op_op, op_source_reg, *op_operands]
result.append(ret)
i += 1
continue
result.append(current)
return result
def compact_spu_load_spo_pattern(self, asm: list[list[str]]) -> list[list[str]]:
# spu RA
# ldi int_7 RA
# ldr RA RB
# spo RA
# OR
# spu RA
# ldi 3 RB
# spo RA
i = 0
result: list[list[str]] = []
while i < len(asm):
instr0 = asm[i]
instr1 = asm[i + 1] if i + 1 < len(asm) else None
instr2 = asm[i + 2] if i + 2 < len(asm) else None
instr3 = asm[i + 3] if i + 3 < len(asm) else None
i += 1
if instr0[0].startswith("@") or instr1 is None or instr2 is None or instr3 is None:
result.append(instr0)
continue
if instr0[0] == "spu" and instr1[0] == "ldi" and instr2[0] == "ldr" and instr3[0] == "spo":
spu_op, spu_reg = instr0
ldi_op, ldi_imm, ldi_target_reg = instr1
ldr_op, ldr_from_reg, ldr_to_reg = instr2
spo_op, spo_reg = instr3
if spu_reg == spo_reg and ldi_target_reg == ldr_from_reg and ldr_from_reg != ldr_to_reg:
ret0 = f"ldi {ldi_imm} {ldr_to_reg}".split()
ret1 = f"ldr {ldr_to_reg} {ldr_to_reg}".split()
result.append(ret0)
result.append(ret1)
i += 3
continue
elif instr0[0] == "spu" and instr1[0] == "ldi" and instr2[0] == "spo":
spu_op, spu_reg = instr0
ldi_op, ldi_imm, ldi_target_reg = instr1
spo_op, spo_reg = instr2
if spu_reg == spo_reg and ldi_target_reg != spu_reg:
ret0 = f"ldi {ldi_imm} {ldi_target_reg}".split()
result.append(ret0)
i += 2
continue
result.append(instr0)
return result
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