org.jikesrvm.compilers.opt.instrsched
Class ResourceMap

java.lang.Object
  org.jikesrvm.compilers.opt.instrsched.ResourceMap

final class ResourceMap
extends Object

Resource usage map representation Used by the scheduler to accommodate resource patterns

See Also:

OperatorClass, Operator

VERBOSE

private static final int VERBOSE

See Also:

Constant Field Values

rumap

private int[] rumap

GROWABLE Resource Usage map.

size

private int size

Current size of the RU map.

ResourceMap

public ResourceMap()

Creates new resource map.

ResourceMap

public ResourceMap(int length)

Creates new resource map with desired initial length.

Parameters:

length - desired initial length of the resource map

debug

private static void debug(String s)

toBinaryPad32

private static String toBinaryPad32(int value)

grow

private void grow(int s)

Grows the RU map to a given size. For internal use only.

schedule

public boolean schedule(Instruction i,
                        int time)

Reserves resources for given instruction at given time.

Parameters:

i - instruction

time - time to schedule

Returns:

true if succeeded, false if there was a conflict

See Also:

unschedule(Instruction)

unschedule

public void unschedule(Instruction i)

Frees resources for given instruction.

Parameters:

i - instruction

See Also:

schedule(Instruction,int)

toString

public String toString()

Returns a string representation of the resource map.

Overrides:

toString in class Object

Returns:

a string representation of the resource map

schedule

private boolean schedule(int[] usage,
                         int time)

Binds resources for given resource usage pattern at given time.

Parameters:

usage -

time -

Returns:

false if there's a resource conflict, true otherwise

unschedule

private void unschedule(int[] usage,
                        int time)

Unbinds resources for given resource usage pattern at given time.

Parameters:

usage -

time -