gridripper::math::expr::ExprOptimizer Class Reference

Optimizes the internal code of an expression. More...

List of all members.

Static Public Member Functions
static StkConst	reuseConst (List< StkConst > nums, String name, double value)
	Tries to reuse an already existing constant.
static void	performAll (List< StkOp > program, List< StkConst > nums, double[] stack, StkOpRepository rep)
	Performs all optimizations.
static void	inlineExprs (List< StkOp > program)
	Make everything inline if possible.
static void	precalc (List< StkOp > program, List< StkConst > nums, double[] stack)
	Precalculates constant subexpressions.
static void	optimizePow (List< StkOp > program, StkOpRepository rep)
	Replaces x^(+-y) by one-argument functions.
static void	optimizeMult (List< StkOp > program, StkOpRepository rep)
	Replaces (.
static void	optimizeDiv (List< StkOp > program, StkOpRepository rep)
	Replaces const/(.
static void	optimizePlus (List< StkOp > program, StkOpRepository rep)
	Replaces const+(.
static void	optimizeMinus (List< StkOp > program, StkOpRepository rep)
	Replaces const-(.
Classes
class	Fdivx
class	Fminusx
class	Fpowx
class	Fxdiv
class	Fxminus
class	Fxmult
class	Fxplus
class	Fxpow

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Detailed Description

Optimizes the internal code of an expression.

Version:

GridRipper 0.5, 11/16/2008

Since:

GROMIT 0.2 (2001)

Author:

Peter Csizmadia

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Member Function Documentation

static StkConst gridripper::math::expr::ExprOptimizer::reuseConst	(	List< StkConst >	nums,
		String	name,
		double	value
	)			[inline, static]

Tries to reuse an already existing constant.

It creates a new object only if the constant is not found in the repository.

Parameters:

	nums	a repository of existing constants
	name	the constant name
	value	the constant value

Returns:

the constant

static void gridripper::math::expr::ExprOptimizer::inlineExprs

(

List< StkOp >

program

)

[inline, static]

Make everything inline if possible.

static void gridripper::math::expr::ExprOptimizer::precalc	(	List< StkOp >	program,
		List< StkConst >	nums,
		double[]	stack
	)			[inline, static]

Precalculates constant subexpressions.

static void gridripper::math::expr::ExprOptimizer::optimizePow	(	List< StkOp >	program,
		StkOpRepository	rep
	)			[inline, static]

Replaces x^(+-y) by one-argument functions.

Optimized y values: 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 5, 6, 7, 8.

static void gridripper::math::expr::ExprOptimizer::optimizeMult	(	List< StkOp >	program,
		StkOpRepository	rep
	)			[inline, static]

Replaces (.

..)*(...), const*(...), and (...)*const by one-argument functions.

static void gridripper::math::expr::ExprOptimizer::optimizeDiv	(	List< StkOp >	program,
		StkOpRepository	rep
	)			[inline, static]

Replaces const/(.

..) and (...)/const by one-argument functions, 1/(...) by (...)^-1.

static void gridripper::math::expr::ExprOptimizer::optimizePlus	(	List< StkOp >	program,
		StkOpRepository	rep
	)			[inline, static]

Replaces const+(.

..) and (...)+const by one-argument functions.

static void gridripper::math::expr::ExprOptimizer::optimizeMinus	(	List< StkOp >	program,
		StkOpRepository	rep
	)			[inline, static]

Replaces const-(.

..) and (...)-const by one-argument functions.

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The documentation for this class was generated from the following file:

• gridripper/math/expr/ExprOptimizer.java