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import numpy as np
import sympy as sp
from pystencils import Field, Assignment, create_kernel
from pystencils.bit_masks import flag_cond
from pystencils import TypedSymbol
def test_flag_condition():
f_arr = np.zeros((2,2,2), dtype=np.float64)
mask_arr = np.zeros((2,2), dtype=np.uint64)
mask_arr[0,1] = (1<<3)
mask_arr[1,0] = (1<<5)
mask_arr[1,1] = (1<<3) + (1 << 5)
f = Field.create_from_numpy_array('f', f_arr, index_dimensions=1)
mask = Field.create_from_numpy_array('mask', mask_arr)
v1 = 42.3
v2 = 39.7
v3 = 119.87
assignments = [
Assignment(f(0), flag_cond(3, mask(0), v1)),
Assignment(f(1), flag_cond(5, mask(0), v2, v3))
]
kernel = create_kernel(assignments).compile()
kernel(f=f_arr, mask=mask_arr)
reference = np.zeros((2,2,2), dtype=np.float64)
reference[0,1,0] = v1
reference[1,1,0] = v1
reference[0,0,1] = v3
reference[0,1,1] = v3
reference[1,0,1] = v2
reference[1,1,1] = v2
np.testing.assert_array_equal(f_arr, reference)