import pytest

import numpy as np

import pystencils as ps
from pystencils.backends.simd_instruction_sets import get_supported_instruction_sets

supported_instruction_sets = get_supported_instruction_sets() if get_supported_instruction_sets() else []


@pytest.mark.parametrize('instruction_set', supported_instruction_sets)
def test_vectorisation_varying_arch(instruction_set):
    shape = (9, 9, 3)
    arr = np.ones(shape, order='f')

    @ps.kernel
    def update_rule(s):
        f = ps.fields("f(3) : [2D]", f=arr)
        s.tmp0 @= f(0)
        s.tmp1 @= f(1)
        s.tmp2 @= f(2)
        f0, f1, f2 = f(0), f(1), f(2)
        f0 @= 2 * s.tmp0
        f1 @= 2 * s.tmp0
        f2 @= 2 * s.tmp0

    ast = ps.create_kernel(update_rule, cpu_vectorize_info={'instruction_set': instruction_set})
    kernel = ast.compile()
    kernel(f=arr)
    np.testing.assert_equal(arr, 2)