Files
tinygrad/test/external/fuzz_fast_idiv.py
George Hotz 7762b3558b clean up the spec (#12868)
* tighten up the spec

* move validate into a different file

* that moved to validate

* after(barr)
2025-10-22 19:50:42 +08:00

26 lines
904 B
Python

import random
import z3
from tinygrad import dtypes
from tinygrad.uop.validate import uops_to_z3, z3_cdiv
from tinygrad.uop.ops import UOp
from tinygrad.uop.decompositions 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 + tuple(dt.vec(4) for dt in dtypes.ints))
u = UOp.variable('x', random.randint(dt.min, 0), random.randint(1, dt.max), dtype=dt)
d = random.randint(1, max(1, u.arg[2]))
if d in powers_of_two: continue
expr = fast_idiv(None, 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=}"