You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
57 lines
1.3 KiB
57 lines
1.3 KiB
from enum import Enum
|
|
from random import random
|
|
from typing import List, Tuple, TypeVar
|
|
|
|
from gbso.program.program import Program
|
|
|
|
|
|
class Mutation(Enum):
|
|
OPCODE = "OPCODE"
|
|
OPERAND = "OPERAND"
|
|
SWAP = "SWAP"
|
|
INSTRUCTION = "INSTRUCTION"
|
|
|
|
|
|
def mutate_program(
|
|
prgm: Program,
|
|
prob_opcode: float,
|
|
prob_operand: float,
|
|
prob_swap: float,
|
|
prob_insn: float,
|
|
prob_insn_unused: float,
|
|
) -> Program:
|
|
mutation = sample_probs(
|
|
[
|
|
(Mutation.OPCODE, prob_opcode),
|
|
(Mutation.OPERAND, prob_operand),
|
|
(Mutation.SWAP, prob_swap),
|
|
(Mutation.INSTRUCTION, prob_insn),
|
|
]
|
|
)
|
|
new_prgm = prgm
|
|
if mutation == Mutation.OPCODE:
|
|
new_prgm = mutate_opcode(prgm)
|
|
elif mutation == Mutation.OPERAND:
|
|
new_prgm = mutate_operand(prgm)
|
|
elif mutation == Mutation.SWAP:
|
|
new_prgm = mutate_swap(prgm)
|
|
elif mutation == Mutation.INSTRUCTION:
|
|
new_prgm = mutate_insn(prgm, prob_insn_unused)
|
|
return new_prgm
|
|
|
|
|
|
A = TypeVar("A")
|
|
|
|
|
|
# NOTE: List must be non-empty and probabilities must sum to 1
|
|
def sample_probs(probs: List[Tuple[A, float]]) -> A:
|
|
r = random()
|
|
cum_prob = 0.0
|
|
|
|
for val, prob in probs[:-1]:
|
|
cum_prob += prob
|
|
if r < cum_prob:
|
|
return val
|
|
|
|
val, _ = probs[-1]
|
|
return val
|