Lucent Technologies Inc.

Agere Systems Guardian Corp.

Harry Dwyer, Iii

Hubert Rae McLellan, Jr

Tor E Jeremiassen

Reliable branch predictions for real-time applications reduce both conditional branch execution time and uncertainties associated with their prediction in a computer implemented application. One method ensures that certain conditional branches are always correctly predicted, effectively converting them to jump instructions during program execution. Another method exploits the fact that some conditional branches always branch in the same direction within a task invocation, although that direction may vary across invocations. These methods improve computer processor utilization and performance.

Reliable branch predictions for real-time applications

An apparatus and method in digital processing provides a simple and efficient way of communicating parameters from a parent thread to child thread with two step thread creation. The method comprising the steps of: allocating hardware context for the child thread; enabling the parent thread to execute other instructions wherein parent thread register writes update both parent and child architectural registers; and spawning the child thread. In essence, the parent thread sends parameters to the child by writing to the parent's registers prior to spawning of the child thread.

Two step thread creation with register renaming

A circuit and a scheme for register renaming responsive to a thread ID register, comprises: a plurality of physical registers; a plurality of architectual registers; a rename logic circuit where every write to an architectual register of the plurality of architectural registers is assigned a new physical register of the plurality of physical registers; a register map circuit containing a corresponding entry for each of the plurality of architectual registers. The register map circuit is responsive to the thread ID register such that a different physical map is selected for architectual registers of each thread, whereby the plurality of architectual registers can be greater than the plurality of physical registers.

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Annadale, NJ, United States of America

Harry Dwyer, Iii