Files
StarPilot/tinygrad_repo/test/external/fuzz_fast_idiv.py
T
firestar5683 22a8575199 Vendor dependencies and resources for standalone builds
Keep official openpilot ancestry and dependency licenses. Store resources directly in Git, remove LFS setup requirements, and leave the downloadable big model outside the source tree.
2026-10-03 21:01:18 +00:00

27 lines
967 B
Python

import random
import z3
from tinygrad import dtypes, Device
from tinygrad.uop.validate import uops_to_z3, z3_cdiv
from tinygrad.uop.ops import UOp
from tinygrad.codegen.decomp.op import fast_idiv
random.seed(42)
powers_of_two = [2**i for i in range(64)]
if __name__ == "__main__":
for i in range(10_000):
if i % 1000 == 0:
print(f"Progress: {i}")
dt = random.choice(dtypes.ints)
vmax = random.randint(1, 2**random.randint(1, dt.max.bit_length()))
u = UOp.variable('x', random.randint(0, vmax-1) if vmax > 1 else 0, vmax, dtype=dt)
d = random.randint(1, max(1, u.vmax)*2)
if d in powers_of_two: continue
expr = fast_idiv(Device[Device.DEFAULT].renderer, u, d)
if expr is None: continue
solver = z3.Solver()
z3_expr, x =uops_to_z3(solver, expr, u)
if solver.check(z3_expr != z3_cdiv(x, d)) == z3.sat:
assert False, f"Failed: {expr.render()} != x//{d} at x={solver.model()}\nx={u}\nd={d}\n{z3_expr=}\n{x/d=}"