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pycodegen
lbmpy
Commits
984606e4
Commit
984606e4
authored
7 years ago
by
Martin Bauer
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Prevent useless, time consuming optimization for some cases
parent
0b2bcad8
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1 changed file
methods/momentbasedsimplifications.py
+4
-2
4 additions, 2 deletions
methods/momentbasedsimplifications.py
with
4 additions
and
2 deletions
methods/momentbasedsimplifications.py
+
4
−
2
View file @
984606e4
...
@@ -35,6 +35,8 @@ def factorRelaxationRates(lbmCollisionEqs):
...
@@ -35,6 +35,8 @@ def factorRelaxationRates(lbmCollisionEqs):
"""
"""
sh
=
lbmCollisionEqs
.
simplificationHints
sh
=
lbmCollisionEqs
.
simplificationHints
assert
'
relaxationRates
'
in
sh
,
"
Needs simplification hint
'
relaxationRates
'
: Sequence of relaxation rates
"
assert
'
relaxationRates
'
in
sh
,
"
Needs simplification hint
'
relaxationRates
'
: Sequence of relaxation rates
"
if
len
(
sh
[
'
relaxationRates
'
])
>
12
:
# heuristics - for too many relaxation rates this simplification makes no sense
return
lbmCollisionEqs
relaxationRates
=
sp
.
Matrix
(
sh
[
'
relaxationRates
'
]).
atoms
(
sp
.
Symbol
)
relaxationRates
=
sp
.
Matrix
(
sh
[
'
relaxationRates
'
]).
atoms
(
sp
.
Symbol
)
...
@@ -193,7 +195,7 @@ def cseInOpposingDirections(lbmCollisionEqs):
...
@@ -193,7 +195,7 @@ def cseInOpposingDirections(lbmCollisionEqs):
order
=
'
None
'
,
optimizations
=
[])
order
=
'
None
'
,
optimizations
=
[])
substitutions
+=
[
sp
.
Eq
(
f
[
0
],
f
[
1
])
for
f
in
foundSubexpressions
]
substitutions
+=
[
sp
.
Eq
(
f
[
0
],
f
[
1
])
for
f
in
foundSubexpressions
]
updateRules
=
[
sp
.
Eq
(
ur
.
lhs
,
ur
.
rhs
.
subs
(
relaxationRate
*
oldTerm
,
newCoefficient
*
newTerm
))
updateRules
=
[
sp
.
Eq
(
ur
.
lhs
,
ur
.
rhs
.
subs
(
relaxationRate
*
oldTerm
,
newCoefficient
*
newTerm
))
for
ur
,
newTerm
,
oldTerm
in
zip
(
updateRules
,
newTerms
,
terms
)]
for
ur
,
newTerm
,
oldTerm
in
zip
(
updateRules
,
newTerms
,
terms
)]
result
+=
updateRules
result
+=
updateRules
...
@@ -220,7 +222,7 @@ def __getCommonQuadraticAndConstantTerms(lbmCollisionEqs):
...
@@ -220,7 +222,7 @@ def __getCommonQuadraticAndConstantTerms(lbmCollisionEqs):
pdfSymbols
=
lbmCollisionEqs
.
freeSymbols
-
relaxationRates
pdfSymbols
=
lbmCollisionEqs
.
freeSymbols
-
relaxationRates
center
=
tuple
([
0
]
*
dim
)
center
=
tuple
([
0
]
*
dim
)
t
=
lbmCollisionEqs
.
mainEquations
[
stencil
.
index
(
center
)].
rhs
t
=
lbmCollisionEqs
.
mainEquations
[
stencil
.
index
(
center
)].
rhs
for
rp
in
relaxationRates
:
for
rp
in
relaxationRates
:
t
=
t
.
subs
(
rp
,
1
)
t
=
t
.
subs
(
rp
,
1
)
...
...
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