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Jonas Plewinski
pystencils
Commits
d0a19b3d
Commit
d0a19b3d
authored
May 07, 2018
by
Martin Bauer
Browse files
mu staggered kernel and test for pygrandchem
parent
755f168c
Changes
1
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Inline
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kernelcreation.py
View file @
d0a19b3d
...
...
@@ 159,11 +159,13 @@ def create_staggered_kernel(staggered_field, expressions, subexpressions=(), tar
.. image:: /img/staggered_grid.svg
Args:
staggered_field: field that has one index coordinate and
staggered_field: field where the first index coordinate defines the location of the staggered value
can have 1 or 2 index coordinates, in case of of two index coordinates at every staggered location
a vector is stored, expressions has to be a sequence of sequences then
where e.g. ``f[0,0](0)`` is interpreted as value at the left cell boundary, ``f[1,0](0)`` the right cell
boundary and ``f[0,0](1)`` the southern cell boundary etc.
expressions: sequence of expressions of length dim, defining how the east, southern, (bottom) cell boundary
should be update
should be update
.
subexpressions: optional sequence of Assignments, that define subexpressions used in the main expressions
target: 'cpu' or 'gpu'
kwargs: passed directly to create_kernel, iteration slice and ghost_layers parameters are not allowed
...
...
@@ 172,24 +174,34 @@ def create_staggered_kernel(staggered_field, expressions, subexpressions=(), tar
AST, see `create_kernel`
"""
assert
'iteration_slice'
not
in
kwargs
and
'ghost_layers'
not
in
kwargs
assert
staggered_field
.
index_dimensions
==
1
,
'Staggered field must have
exactly one
index dimension'
assert
staggered_field
.
index_dimensions
in
(
1
,
2
)
,
'Staggered field must have
one or two
index dimension
s
'
dim
=
staggered_field
.
spatial_dimensions
counters
=
[
LoopOverCoordinate
.
get_loop_counter_symbol
(
i
)
for
i
in
range
(
dim
)]
conditions
=
[
counters
[
i
]
<
staggered_field
.
shape
[
i
]

1
for
i
in
range
(
dim
)]
assert
len
(
expressions
)
==
dim
if
staggered_field
.
index_dimensions
==
2
:
assert
all
(
len
(
sublist
)
==
len
(
expressions
[
0
])
for
sublist
in
expressions
),
\
"If staggered field has two index dimensions expressions has to be a sequence of sequences of all the "
\
"same length."
final_assignments
=
[]
for
d
in
range
(
dim
):
cond
=
sp
.
And
(
*
[
conditions
[
i
]
for
i
in
range
(
dim
)
if
d
!=
i
])
a_coll
=
AssignmentCollection
([
Assignment
(
staggered_field
(
d
),
expressions
[
d
])],
list
(
subexpressions
))
a_coll
=
a_coll
.
new_filtered
([
staggered_field
(
d
)])
if
staggered_field
.
index_dimensions
==
1
:
assignments
=
[
Assignment
(
staggered_field
(
d
),
expressions
[
d
])]
a_coll
=
AssignmentCollection
(
assignments
,
list
(
subexpressions
)).
new_filtered
([
staggered_field
(
d
)])
elif
staggered_field
.
index_dimensions
==
2
:
assert
staggered_field
.
has_fixed_index_shape
assignments
=
[
Assignment
(
staggered_field
(
d
,
i
),
expr
)
for
i
,
expr
in
enumerate
(
expressions
[
d
])]
a_coll
=
AssignmentCollection
(
assignments
,
list
(
subexpressions
))
a_coll
=
a_coll
.
new_filtered
([
staggered_field
(
d
,
i
)
for
i
in
range
(
staggered_field
.
index_shape
[
1
])])
sp_assignments
=
[
SympyAssignment
(
a
.
lhs
,
a
.
rhs
)
for
a
in
a_coll
.
all_assignments
]
final_assignments
.
append
(
Conditional
(
cond
,
Block
(
sp_assignments
)))
ghost_layers
=
[(
1
,
0
)]
*
dim
ast
=
create_kernel
(
final_assignments
,
ghost_layers
=
ghost_layers
,
target
=
target
,
**
kwargs
)
if
target
==
'cpu'
:
remove_conditionals_in_staggered_kernel
(
ast
)
return
ast
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