Abstract: Content-Addressable Memory (CAM) arrays and related circuitry for integrated circuits and CAM array comparison methods are provided such that relatively low power is used in the operation of the CAM circuitry. A binary value pair is stored in a pair of CAM memory elements. A comparison signal is provided to comparator circuitry that uniquely represents the stored binary values. A match signal is input to the comparator circuitry that uniquely represents a binary value pair to be compared with the stored binary value pair. In one example, a transistor is operated to output a positive match result signal only on a condition that the comparison signal provided to the comparator circuitry and match signal input to the comparator circuitry represent the same binary value pair. In that example, no transistor of the comparator circuitry is operated when the comparison signal provided to the comparator circuitry and match signal input to the comparator circuitry represent different binary value pairs.

Abstract: A complementary metal oxide semiconductor (CMOS) circuit is described. The CMOS circuit includes a plurality of CMOS gates, a plurality of logic inputs and a logic output. Each CMOS gate is connected to a negative power supply terminal (Vss) and a positive power supply terminal (Vdd). The CMOS circuit further includes parasitic nets connected to the CMOS gates, and net pulldown circuits for eliminating a charge accumulation on the parasitic nets while avoiding potential short circuit conditions. The CMOS gates may be OR-AND-INVERT (OAI) gates or AND-OR-INVERT (AOI) gates.

Abstract: A method for picking an instruction for execution by a processor includes providing a multiple-entry vector, each entry in the vector including an indication of whether a corresponding instruction is ready to be picked. The vector is partitioned into equal-sized groups, and each group is evaluated starting with a highest priority group. The evaluating includes logically canceling all other groups in the vector when a group is determined to include an indication that an instruction is ready to be picked, whereby the vector only includes a positive indication for the one instruction that is ready to be picked.

Abstract: A complementary metal oxide semiconductor (CMOS) circuit is described. The CMOS circuit includes a plurality of CMOS gates, a plurality of logic inputs and a logic output. Each CMOS gate is connected to a negative power supply terminal (Vss) and a positive power supply terminal (Vdd). The CMOS circuit further includes parasitic nets connected to the CMOS gates, and net pulldown circuits for eliminating a charge accumulation on the parasitic nets while avoiding potential short circuit conditions. The CMOS gates may be OR-AND-INVERT (OAI) gates or AND-OR-INVERT (AOI) gates.

Abstract: A method and apparatus for scheduling execution of instructions in a multi-issue processor. The apparatus includes post wake logic circuitry configured to track a plurality of entries corresponding to a plurality of instructions to be scheduled. Each instruction has at least one associated source address and a destination address. The post wake logic circuitry is configured to drive a ready input indicating an entry that is ready for execution based on a current match input. A picker circuitry is configured to pick an instruction for execution based the ready input. A compare circuit is configured to determine the destination address for the picked instruction, compare the destination address to the source address for all entries and drive the current match input.

Abstract: A method and apparatus for testing a content addressable memory (CAM) array includes writing known data to the CAM array and providing comparison data to the CAM array. A determination is made whether the CAM array is operating correctly responsive to a comparison of the known data and the comparison data.

Abstract: Content-Addressable Memory (CAM) arrays and related circuitry for integrated circuits and CAM array comparison methods are provided such that relatively low power is used in the operation of the CAM circuitry. A binary value pair is stored in a pair of CAM memory elements. A comparison signal is provided to comparator circuitry that uniquely represents the stored binary values. A match signal is input to the comparator circuitry that uniquely represents a binary value pair to be compared with the stored binary value pair. In one example, a transistor is operated to output a positive match result signal only on a condition that the comparison signal provided to the comparator circuitry and match signal input to the comparator circuitry represent the same binary value pair. In that example, no transistor of the comparator circuitry is operated when the comparison signal provided to the comparator circuitry and match signal input to the comparator circuitry represent different binary value pairs.