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try:
from pystencils.llvm.llvmjit import generate_and_jit
from pystencils.llvm import create_kernel, make_python_function
from pystencils.cpu.cpujit import get_llc_command
except ModuleNotFoundError:
pytest.importorskip("llvmlite")
def test_jacobi_fixed_field_size():
size = (30, 20)
src_field_llvm = np.random.rand(*size)
src_field_py = np.copy(src_field_llvm)
dst_field_llvm = np.zeros(size)
dst_field_py = np.zeros(size)
f = Field.create_from_numpy_array("f", src_field_llvm)
d = Field.create_from_numpy_array("d", dst_field_llvm)
jacobi = Assignment(d[0, 0], (f[1, 0] + f[-1, 0] + f[0, 1] + f[0, -1]) / 4)
ast = create_kernel([jacobi])
for x in range(1, size[0] - 1):
for y in range(1, size[1] - 1):
dst_field_py[x, y] = 0.25 * (src_field_py[x - 1, y] + src_field_py[x + 1, y] +
src_field_py[x, y - 1] + src_field_py[x, y + 1])
jit = generate_and_jit(ast)
jit('kernel', dst_field_llvm, src_field_llvm)
error = np.sum(np.abs(dst_field_py - dst_field_llvm))
np.testing.assert_almost_equal(error, 0.0)
@pytest.mark.skipif(not get_llc_command(), reason="Tests requires llc in $PATH")
def test_jacobi_fixed_field_size_gpu():
import pycuda.autoinit # noqa
from pycuda.gpuarray import to_gpu
src_field_llvm = np.random.rand(*size)
src_field_py = np.copy(src_field_llvm)
dst_field_llvm = np.zeros(size)
dst_field_py = np.zeros(size)
f = Field.create_from_numpy_array("f", src_field_py)
d = Field.create_from_numpy_array("d", dst_field_py)
src_field_llvm = to_gpu(src_field_llvm)
dst_field_llvm = to_gpu(dst_field_llvm)
jacobi = Assignment(d[0, 0], (f[1, 0] + f[-1, 0] + f[0, 1] + f[0, -1]) / 4)
for x in range(1, size[0] - 1):
for y in range(1, size[1] - 1):
dst_field_py[x, y] = 0.25 * (src_field_py[x - 1, y] + src_field_py[x + 1, y] +
src_field_py[x, y - 1] + src_field_py[x, y + 1])
jit = generate_and_jit(ast)
jit('kernel', dst_field_llvm, src_field_llvm)
error = np.sum(np.abs(dst_field_py - dst_field_llvm.get()))
np.testing.assert_almost_equal(error, 0.0)
def test_jacobi_variable_field_size():
size = (3, 3, 3)
f = Field.create_generic("f", 3)
d = Field.create_generic("d", 3)
jacobi = Assignment(d[0, 0, 0], (f[1, 0, 0] + f[-1, 0, 0] + f[0, 1, 0] + f[0, -1, 0]) / 4)
ast = create_kernel([jacobi])
src_field_llvm = np.random.rand(*size)
src_field_py = np.copy(src_field_llvm)
dst_field_llvm = np.zeros(size)
dst_field_py = np.zeros(size)
for x in range(1, size[0] - 1):
for y in range(1, size[1] - 1):
for z in range(1, size[2] - 1):
dst_field_py[x, y, z] = 0.25 * (src_field_py[x - 1, y, z] + src_field_py[x + 1, y, z] +
src_field_py[x, y - 1, z] + src_field_py[x, y + 1, z])
kernel = make_python_function(ast, {'f': src_field_llvm, 'd': dst_field_llvm})
kernel()
error = np.sum(np.abs(dst_field_py - dst_field_llvm))
np.testing.assert_almost_equal(error, 0.0)
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def test_pow_llvm():
size = (30, 20)
src_field_llvm = 4 * np.ones(size)
dst_field_llvm = np.zeros(size)
f = Field.create_from_numpy_array("f", src_field_llvm)
d = Field.create_from_numpy_array("d", dst_field_llvm)
ur = Assignment(d[0, 0], sp.Pow(f[0, 0], -1.0))
ast = create_kernel([ur])
jit = generate_and_jit(ast)
jit('kernel', dst_field_llvm, src_field_llvm)
assert np.all(0.25 == dst_field_llvm)
ur = Assignment(d[0, 0], sp.Pow(f[0, 0], 0.5))
ast = create_kernel([ur])
jit = generate_and_jit(ast)
jit('kernel', dst_field_llvm, src_field_llvm)
assert np.all(2.0 == dst_field_llvm)
ur = Assignment(d[0, 0], sp.Pow(f[0, 0], 2.0))
ast = create_kernel([ur])
jit = generate_and_jit(ast)
jit('kernel', dst_field_llvm, src_field_llvm)
assert np.all(16.0 == dst_field_llvm)
ur = Assignment(d[0, 0], sp.Pow(f[0, 0], 3.0))
ast = create_kernel([ur])
jit = generate_and_jit(ast)
jit('kernel', dst_field_llvm, src_field_llvm)
assert np.all(64.0 == dst_field_llvm)
ur = Assignment(d[0, 0], sp.Pow(f[0, 0], 4.0))
ast = create_kernel([ur])
jit = generate_and_jit(ast)
jit('kernel', dst_field_llvm, src_field_llvm)
assert np.all(256.0 == dst_field_llvm)
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def test_piecewise_llvm():
size = (30, 20)
src_field_llvm = np.zeros(size)
dst_field_llvm = np.zeros(size)
src_field_llvm[0:15, :] = 10.0
f = Field.create_from_numpy_array("f", src_field_llvm)
d = Field.create_from_numpy_array("d", dst_field_llvm)
picewise_test_strict_less_than = Assignment(d[0, 0], sp.Piecewise((1.0, f[0, 0] > 10), (0.0, True)))
ast = create_kernel([picewise_test_strict_less_than])
jit = generate_and_jit(ast)
jit('kernel', dst_field_llvm, src_field_llvm)
assert (np.all(dst_field_llvm[:, :] == 0.0))
src_field_llvm = np.zeros(size)
dst_field_llvm = np.zeros(size)
src_field_llvm[0:15, :] = 10.0
picewise_test_less_than = Assignment(d[0, 0], sp.Piecewise((1.0, f[0, 0] >= 10), (0.0, True)))
ast = create_kernel([picewise_test_less_than])
jit = generate_and_jit(ast)
jit('kernel', dst_field_llvm, src_field_llvm)
assert (np.all(dst_field_llvm[0:15, :] == 1.0))
src_field_llvm = np.zeros(size)
dst_field_llvm = np.zeros(size)
src_field_llvm[0:15, :] = 10.0
picewise_test_strict_greater_than = Assignment(d[0, 0], sp.Piecewise((1.0, f[0, 0] < 5), (0.0, True)))
ast = create_kernel([picewise_test_strict_greater_than])
jit = generate_and_jit(ast)
jit('kernel', dst_field_llvm, src_field_llvm)
assert (np.all(dst_field_llvm[15:, :] == 1.0))
src_field_llvm = np.zeros(size)
dst_field_llvm = np.zeros(size)
src_field_llvm[0:15, :] = 10.0
picewise_test_greater_than = Assignment(d[0, 0], sp.Piecewise((1.0, f[0, 0] <= 10), (0.0, True)))
ast = create_kernel([picewise_test_greater_than])
jit = generate_and_jit(ast)
jit('kernel', dst_field_llvm, src_field_llvm)
assert (np.all(dst_field_llvm[:, :] == 1.0))
src_field_llvm = np.zeros(size)
dst_field_llvm = np.zeros(size)
src_field_llvm[0:15, :] = 10.0
picewise_test_equality = Assignment(d[0, 0], sp.Piecewise((1.0, sp.Equality(f[0, 0], 10.0)), (0.0, True)))
ast = create_kernel([picewise_test_equality])
jit = generate_and_jit(ast)
jit('kernel', dst_field_llvm, src_field_llvm)
assert (np.all(dst_field_llvm[0:15, :] == 1.0))
src_field_llvm = np.zeros(size)
dst_field_llvm = np.zeros(size)
src_field_llvm[0:15, :] = 10.0
picewise_test_unequality = Assignment(d[0, 0], sp.Piecewise((1.0, sp.Unequality(f[0, 0], 10.0)), (0.0, True)))
ast = create_kernel([picewise_test_unequality])
jit = generate_and_jit(ast)
jit('kernel', dst_field_llvm, src_field_llvm)
assert (np.all(dst_field_llvm[15:, :] == 1.0))
def test_piecewise_or_llvm():
size = (30, 20)
src_field_llvm = np.zeros(size)
dst_field_llvm = np.zeros(size)
src_field_llvm[0:15, :] = 10.5
f = Field.create_from_numpy_array("f", src_field_llvm)
d = Field.create_from_numpy_array("d", dst_field_llvm)
picewise_test_or = Assignment(d[0, 0], sp.Piecewise((1.0, sp.Or(f[0, 0] > 11, f[0, 0] < 10)), (0.0, True)))
ast = create_kernel([picewise_test_or])
jit = generate_and_jit(ast)
jit('kernel', dst_field_llvm, src_field_llvm)
assert (np.all(dst_field_llvm[0:15, :] == 0.0))
def test_print_function_llvm():
size = (30, 20)
src_field_llvm = np.zeros(size)
dst_field_llvm = np.zeros(size)
src_field_llvm[0:15, :] = 0.0
f = Field.create_from_numpy_array("f", src_field_llvm)
d = Field.create_from_numpy_array("d", dst_field_llvm)
up = Assignment(d[0, 0], sp.sin(f[0, 0]))
ast = create_kernel([up])
# kernel = make_python_function(ast, {'f': src_field_llvm, 'd': dst_field_llvm})
jit = generate_and_jit(ast)
jit('kernel', dst_field_llvm, src_field_llvm)
assert (np.all(dst_field_llvm[:, :] == 0.0))
if __name__ == "__main__":
test_jacobi_fixed_field_size_gpu()