test_operators.py 文件源码

def test_UnscaledFFT_2d(backend, M, N, B ):
    b = backend()

    # forward
    x = b.rand_array( (M*N, B) )
    y = b.rand_array( (M*N, B) )
    x_h = x.to_host().reshape( (M,N,B), order='F' )

    A = b.UnscaledFFT( (M,N), dtype=x.dtype )

    A.eval(y, x)

    y_exp = np.fft.fftn( x_h, axes=(0,1) )
    y_act = y.to_host().reshape( (M,N,B), order='F' )
    npt.assert_allclose(y_act, y_exp, rtol=1e-2)

    # adjoint
    x = b.rand_array( (M*N, B) )
    y = b.rand_array( (M*N, B) )
    x_h = x.to_host().reshape( (M,N,B), order='F' )

    A.H.eval(y, x)

    y_exp = np.fft.ifftn( x_h, axes=(0,1) ) * (M*N)
    y_act = y.to_host().reshape( (M,N,B), order='F' )
    npt.assert_allclose(y_act, y_exp, rtol=1e-2)