Arm Limited

3dlabs Inc., Ltd.

Precision Vision, Inc.

John David Robson

William Robert Stoye

Sean Tristram LeGuay Ellis

Isidoros Sideris

Jonathan Bloomfield

Stephane Forey

Nick Murphy

A data processor includes an execution unit that executes instructions to perform data processing operations, a register file operable to store data values for use by and produced by the execution unit, and a buffer intermediate between the register file for providing data values from the register file to the execution unit for use when executing an instruction, and to receive output data values from the execution unit for writing to the register file. Instructions to be executed by the execution unit of the data processor have associated buffer eviction priority indications representative of a priority for eviction from the buffer of an output data value that will be generated when executing the instruction. The buffer eviction priority indications are then used when selecting data values to evict from the buffer.

Data processing systems including an intermediate buffer with controlled data value eviction

There is provided a graphics processor comprising a programmable execution unit operable to execute programs for respective execution thread groups. An eviction checking circuit is provided that is configured to check instructions as they are being fetched for execution from an instruction cache to determine whether the instruction includes any conditional eviction conditions that if not met indicate that the program to which the instruction relates should not continue to be executed for the group of execution threads. The eviction checking circuit is then configured to check whether any conditional eviction conditions are satisfied at this point and either allow the execution unit to continue program execution or cause the thread group to be evicted.

Graphics processing systems with conditional evictions

An apparatus and method for evaluating a patient's contrast sensitivity. The apparatus including a table or chart with a plurality of shaded marks printed in cells in the table or chart. The shaded marks printed with a various contrasts with a log of Weber contrast ranging from &#x2212;0.20 to &#x2212;2.15. Where a subject marks an observed position of the shaded marks and a key is used to check the observed position against an actual position of the shaded mark to determine a threshold contrast of the subject.

System and method for measurement of contrast sensitivity

An architecture for microprocessors, in which instructions include a type identifier, selects one of several interpretation registers. The interpretation registers hold information for interpreting the opcode of each instruction, so that a stream of compressed instructions (with type identifiers) can be translated into a stream of expanded instructions. Preferably the type identifiers also distinguish sequencer instructions from processing-element instructions, and can even distinguish among different types of sequencer instructions (as well as among different types of processing-element instructions).

Growing community of inventors

Cambridge, United Kingdom

John David Robson