Commit 90c9bb3c authored by Martin Bauer's avatar Martin Bauer
Browse files

lbmpy: now can build periodicity into kernel

parent f4cf9352
import sympy as sp
from sympy.tensor import IndexedBase
from pystencils.field import Field
from pystencils.types import TypedSymbol, createType, get_type_from_sympy
from pystencils.types import TypedSymbol, createType, get_type_from_sympy, createTypeFromString
class Node(object):
......@@ -301,6 +301,16 @@ class LoopOverCoordinate(Node):
def loopCounterName(self):
return LoopOverCoordinate.getLoopCounterName(self.coordinateToLoopOver)
def isLoopCounterSymbol(symbol):
prefix = LoopOverCoordinate.LOOP_COUNTER_NAME_PREFIX
if not
return None
if symbol.dtype != createTypeFromString('int'):
return None
coordinate = int([len(prefix)+1:])
return coordinate
def getLoopCounterSymbol(coordinateToLoopOver):
return TypedSymbol(LoopOverCoordinate.getLoopCounterName(coordinateToLoopOver), 'int')
from pystencils.gpucuda.indexing import BlockIndexing
from pystencils.transformations import resolveFieldAccesses, typeAllEquations, parseBasePointerInfo, getCommonShape
from pystencils.astnodes import Block, KernelFunction, SympyAssignment
from pystencils.astnodes import Block, KernelFunction, SympyAssignment, LoopOverCoordinate
from pystencils.types import TypedSymbol, BasicType, StructType
from pystencils import Field
......@@ -25,7 +25,7 @@ def createCUDAKernel(listOfEquations, functionName="kernel", typeForSymbol=None,
iterationSlice = []
if isinstance(ghostLayers, int):
for i in range(len(commonShape)):
iterationSlice.append(slice(ghostLayers[i], -ghostLayers[i] if ghostLayers[i] > 0 else None))
iterationSlice.append(slice(ghostLayers, -ghostLayers if ghostLayers > 0 else None))
for i in range(len(commonShape)):
iterationSlice.append(slice(ghostLayers[i][0], -ghostLayers[i][1] if ghostLayers[i][1] > 0 else None))
......@@ -46,6 +46,14 @@ def createCUDAKernel(listOfEquations, functionName="kernel", typeForSymbol=None,
# add the function which determines #blocks and #threads as additional member to KernelFunction node
# this is used by the jit
# If loop counter symbols have been explicitly used in the update equations (e.g. for built in periodicity),
# they are defined here
undefinedLoopCounters = {LoopOverCoordinate.isLoopCounterSymbol(s): s for s in ast.body.undefinedSymbols
if LoopOverCoordinate.isLoopCounterSymbol(s) is not None}
for i, loopCounter in undefinedLoopCounters.items():
ast.body.insertFront(SympyAssignment(loopCounter, indexing.coordinates[i]))
ast.indexing = indexing
return ast
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