From 663dd123a07be3571e203abf8c3a7bf05f8fe065 Mon Sep 17 00:00:00 2001
From: Martin Bauer <martin.bauer@fau.de>
Date: Thu, 10 Nov 2016 17:05:11 +0100
Subject: [PATCH] C backend: no dependence to cgen package any more
---
ast.py | 6 ++--
backends/cbackend.py | 69 +++++++++++++-------------------------------
transformations.py | 2 +-
3 files changed, 24 insertions(+), 53 deletions(-)
diff --git a/ast.py b/ast.py
index 9f027ac1d..4669f3b3e 100644
--- a/ast.py
+++ b/ast.py
@@ -341,7 +341,7 @@ class TemporaryMemoryAllocation(Node):
@property
def symbolsDefined(self):
- return set([self._symbol])
+ return set([self.symbol])
@property
def symbolsRead(self):
@@ -349,12 +349,12 @@ class TemporaryMemoryAllocation(Node):
@property
def args(self):
- return [self._symbol]
+ return [self.symbol]
class TemporaryMemoryFree(Node):
def __init__(self, typedSymbol):
- self._symbol = typedSymbol
+ self.symbol = typedSymbol
@property
def symbolsDefined(self):
diff --git a/backends/cbackend.py b/backends/cbackend.py
index bf5f92a06..314c301bf 100644
--- a/backends/cbackend.py
+++ b/backends/cbackend.py
@@ -1,4 +1,4 @@
-import cgen as c
+import textwrap
from sympy.utilities.codegen import CCodePrinter
from pystencils.ast import Node
@@ -40,9 +40,6 @@ class CustomCppCode(Node):
def symbolsRead(self):
return self._symbolsRead
- def generateC(self):
- return c.LiteralLines(self._code)
-
class PrintNode(CustomCppCode):
def __init__(self, symbolToPrint):
@@ -58,6 +55,7 @@ class CBackend:
def __init__(self, cuda=False):
self.cuda = cuda
self.sympyPrinter = CustomSympyPrinter()
+ self._indent = " "
def __call__(self, node):
return str(self._print(node))
@@ -70,46 +68,30 @@ class CBackend:
raise NotImplementedError("CBackend does not support node of type " + cls.__name__)
def _print_KernelFunction(self, node):
- functionArguments = [MyPOD(s.dtype, s.name) for s in node.parameters]
+ functionArguments = ["%s %s" % (s.dtype, s.name) for s in node.parameters]
prefix = "__global__ void" if self.cuda else "void"
- functionPOD = MyPOD(prefix, node.functionName, )
- funcDeclaration = c.FunctionDeclaration(functionPOD, functionArguments)
- return c.FunctionBody(funcDeclaration, self._print(node.body))
+ funcDeclaration = "%s %s(%s)" % (prefix, node.functionName, ", ".join(functionArguments))
+ body = self._print(node.body)
+ return funcDeclaration + "\n" + body
def _print_Block(self, node):
- return c.Block([self._print(child) for child in node.args])
+ blockContents = "\n".join([self._print(child) for child in node.args])
+ return "{\n%s\n}" % (textwrap.indent(blockContents, self._indent))
def _print_PragmaBlock(self, node):
- class PragmaGenerable(c.Generable):
- def __init__(self, line, block):
- self._line = line
- self._block = block
-
- def generate(self):
- yield self._line
- for e in self._block.generate():
- yield e
- return PragmaGenerable(node.pragmaLine, self._print_Block(node))
+ return "%s\n%s" % (node.pragmaLine, self._print_Block(node))
def _print_LoopOverCoordinate(self, node):
- class LoopWithOptionalPrefix(c.CustomLoop):
- def __init__(self, intro_line, body, prefixLines=[]):
- super(LoopWithOptionalPrefix, self).__init__(intro_line, body)
- self.prefixLines = prefixLines
-
- def generate(self):
- for l in self.prefixLines:
- yield l
-
- for e in super(LoopWithOptionalPrefix, self).generate():
- yield e
-
counterVar = node.loopCounterName
start = "int %s = %s" % (counterVar, self.sympyPrinter.doprint(node.start))
condition = "%s < %s" % (counterVar, self.sympyPrinter.doprint(node.stop))
update = "%s += %s" % (counterVar, self.sympyPrinter.doprint(node.step),)
loopStr = "for (%s; %s; %s)" % (start, condition, update)
- return LoopWithOptionalPrefix(loopStr, self._print(node.body), prefixLines=node.prefixLines)
+
+ prefix = "\n".join(node.prefixLines)
+ if prefix:
+ prefix += "\n"
+ return "%s%s\n%s" % (prefix, loopStr, self._print(node.body))
def _print_SympyAssignment(self, node):
dtype = ""
@@ -118,19 +100,17 @@ class CBackend:
dtype = "const " + node.lhs.dtype + " "
else:
dtype = node.lhs.dtype + " "
-
- return c.Assign(dtype + self.sympyPrinter.doprint(node.lhs),
- self.sympyPrinter.doprint(node.rhs))
+ return "%s %s = %s;" % (dtype, self.sympyPrinter.doprint(node.lhs), self.sympyPrinter.doprint(node.rhs))
def _print_TemporaryMemoryAllocation(self, node):
- return c.Assign(node.symbol.dtype + " * " + self.sympyPrinter.doprint(node.symbol),
- "new %s[%s]" % (node.symbol.dtype, self.sympyPrinter.doprint(node.size)))
+ return "%s * %s = new %s[%s];" % (node.symbol.dtype, self.sympyPrinter.doprint(node.symbol),
+ node.symbol.dtype, self.sympyPrinter.doprint(node.size))
def _print_TemporaryMemoryFree(self, node):
- return c.Statement("delete [] %s" % (self.sympyPrinter.doprint(node.symbol),))
+ return "delete [] %s;" % (self.sympyPrinter.doprint(node.symbol),)
def _print_CustomCppCode(self, node):
- return c.LiteralLines(node.code)
+ return node.code
# ------------------------------------------ Helper function & classes -------------------------------------------------
@@ -155,13 +135,4 @@ class CustomSympyPrinter(CCodePrinter):
def _print_Piecewise(self, expr):
"""Print piecewise in one line (remove newlines)"""
result = super(CustomSympyPrinter, self)._print_Piecewise(expr)
- return result.replace("\n", "")
-
-
-class MyPOD(c.Declarator):
- def __init__(self, dtype, name):
- self.dtype = dtype
- self.name = name
-
- def get_decl_pair(self):
- return [self.dtype], self.name
+ return result.replace("\n", "")
\ No newline at end of file
diff --git a/transformations.py b/transformations.py
index 2b47cbde3..62d400b5a 100644
--- a/transformations.py
+++ b/transformations.py
@@ -364,7 +364,7 @@ def splitInnerLoop(astNode, symbolGroups):
assignmentGroups.append(assignmentGroup)
newLoops = [innerLoop.newLoopWithDifferentBody(ast.Block(group)) for group in assignmentGroups]
- innerLoop.parent.replace(innerLoop, newLoops)
+ innerLoop.parent.replace(innerLoop, ast.Block(newLoops))
for tmpArray in symbolsWithTemporaryArray:
outerLoop.parent.insertFront(ast.TemporaryMemoryAllocation(tmpArray, innerLoop.stop))
--
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