Data processing systems

A method of operating a data processing system, the method comprising:

• a first processing stage producing a set of data according to a first pattern, the set of data comprising plural data positions;
• and
• a second processing stage using the set of data according to a second different pattern;
• wherein the method further comprises:
• determining a particular data position or positions of the set of data for controlling the production of data by the first processing stage;
• and
• controlling the production of data by the first processing stage when the second processing stage reaches the particular data position or positions.

A data processing system comprising:

• first processing stage circuitry operable to produce data according to a first pattern;
• and
• second processing stage circuitry operable to use the data produced by the first processing stage according to a second different pattern;
• wherein the data processing system is operable to:
• deactivate the first processing stage circuitry when the first processing stage circuitry has produced a set of data, the set of data including sufficient data to allow the set of data to be used by the second processing stage circuitry according to the second pattern;
• and
• re-activate the first processing stage circuitry based on the use of that set of data by the second processing stage circuitry.

A data processing system comprising:

• first processing stage circuitry operable to produce a first set of data according to a first pattern, the first set of data comprising plural data positions;
• and
• second processing stage circuitry operable to use the first set of data according to a second different pattern;
• wherein the data processing system is configured to:
• determine a particular data position or positions of the first set of data for controlling the production of data by the first processing stage circuitry;
• and
• control the production of data by the first processing stage circuitry when the second processing stage circuitry reaches the particular data position or positions.

A non-transitory computer readable storage medium storing computer software code which when executing on a processor performs a method of operating a data processing system, the method comprising:

• a first processing stage of the data processing system producing data according to a first pattern;
• and
• a second processing stage of the data processing system using the data produced by the first processing stage according to a second different pattern;
• the method further comprising the data processing system:
• deactivating the first processing stage when the first processing stage has produced a set of data, the set of data including sufficient data to allow the set of data to be used by the second processing stage according to the second pattern;
• and
• re-activating the first processing stage based on the use of the set of data by the second processing stage.