From 82a44e0d64afb8818ea98d68dc08108885d503c2 Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Mon, 21 Oct 2019 18:42:24 +0200
Subject: Pull in basics from symlbm_playground

It's time to extract the generator-part of my GPU LBM playground and turn it
into a nice reusable library. The goal is to produce a framework that can be
used to generate collision and streaming programs from symbolic descriptions.

i.e. it should be possible to select a LB model, the desired boundary
conditions as well as a data structure / streaming model and use this
information to automatically generate matching OpenCL / CUDA / C++
programs.
---
 boltzgen/utility/optimizations.py | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 boltzgen/utility/optimizations.py

(limited to 'boltzgen/utility/optimizations.py')

diff --git a/boltzgen/utility/optimizations.py b/boltzgen/utility/optimizations.py
new file mode 100644
index 0000000..93dad09
--- /dev/null
+++ b/boltzgen/utility/optimizations.py
@@ -0,0 +1,10 @@
+from sympy import *
+
+from sympy.codegen.rewriting import ReplaceOptim
+
+expand_square = ReplaceOptim(
+    lambda e: e.is_Pow and e.exp.is_integer and e.exp == 2,
+    lambda p: UnevaluatedExpr(Mul(p.base, p.base, evaluate = False))
+)
+
+custom = [ (expand_square, expand_square) ] + cse_main.basic_optimizations
-- 
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