RISC CPU instructions particularly suited for decoding digital signal processing applications

An integrated circuit device circuit arrangement for processing multimedia data, the circuit arrangement comprising a processing core including:

• (1) a datapath configured to perform a predetermined digital signal processing (DSP) operation;
• (2) unit registers for storing data used in digital signal processing;
• and
• (3) a programmable controller coupled to the datapath and unit registers, the programmable controller configured to execute a local computer program comprising instructions to control the operation of the datapath to process data, the programmable controller responding to an insert instruction identifying a source register of said unit registers, a target register of said unit registers, a number of bits and a starting position, by copying the identified number of bits from the identified source register of said unit registers, starting from a predetermined position in the identified source register of said unit registers, to the identified target register of said unit registers, starting at the identified starting position.

An integrated circuit device circuit arrangement for processing multimedia data, the circuit arrangement comprising a processing core including:

• (1) a datapath configured to perform a predetermined digital signal processing (DSP) operation;
• (2) unit registers for storing data used in digital signal processing;
• and
• (3) a programmable controller coupled to the datapath and unit registers, the programmable controller configured to execute a local computer program comprising instructions to control the operation of the datapath to process data, the programmable controller responding to a leading value detect instruction identifying a target register of said unit registers and a destination register of said unit registers, by identifying the position of a bit closest to a predetermined end of the identified target register of said unit registers which has a predetermined binary value, and writing an indication of the identified position into the identified destination register of said unit registers.