def test_plan1d(self):
from pyculib.fft.binding import Plan, CUFFT_C2C
n = 10
data = np.arange(n, dtype=np.complex64)
orig = data.copy()
d_data = cuda.to_device(data)
fftplan = Plan.one(CUFFT_C2C, n)
fftplan.forward(d_data, d_data)
fftplan.inverse(d_data, d_data)
d_data.copy_to_host(data)
result = data / n
self.assertTrue(np.allclose(orig, result.real))
arg3 = clip(max((-z + r1 + r2)*(z + r1 - r2)*(z - r1 + r2)*(z + r1 + r2), 0.),-1,1)
if (r1 <= r2 - z) : return math.pi*r1*r1 # planet completely overlaps stellar circle
elif (r1 >= r2 + z) : return math.pi*r2*r2 # stellar circle completely overlaps planet
else : return r1*r1*math.acos(arg1) + r2*r2*math.acos(arg2) - 0.5*math.sqrt(arg3) # partial overlap
####################
# GPU functions
##################
if numba.cuda.is_available():
# FFT plan
from pyculib.fft.binding import Plan, CUFFT_C2C
fftplan17 = Plan.one(CUFFT_C2C, 2**17)
fftplan18 = Plan.one(CUFFT_C2C, 2**18)
@numba.cuda.jit('float64(float64,float64,float64)', device=True, inline=True)
def d_clip(a, b, c):
if (a < b) : return b
elif (a > c) : return c
else : return a
@numba.cuda.jit('float64(float64,float64,float64)', device=True, inline=True)
def d_area(z, r1, r2):
arg1 = d_clip((z*z + r1*r1 - r2*r2)/(2.*z*r1),-1,1)
arg2 = d_clip((z*z + r2*r2 - r1*r1)/(2.*z*r2),-1,1)
arg3 = d_clip(max((-z + r1 + r2)*(z + r1 - r2)*(z - r1 + r2)*(z + r1 + r2), 0.),-1,1)