Abstract
The Diamond 330HiFi audio DSP core is a high-performance, 2-way superscalar RISC CPU core that has been optimized for recording, encoding, decoding, and playing music and other audio files. The Diamond 330HiFi DSP core's two superscalar execution pipelines and 64-bit FLIX-format instructions allow the processor to break the 1-instruction-per-clock barrier. The processor's architecture has been sculpted specifically to optimally run audio codecs (coders/decoders) in the fewest possible clock cycles to achieve the lowest possible operating power. Several codecs for widely used digital-audio formats are available from Tensilica. Furthermore, Tensilica added more than 300 new instructions and two new register files to the base Xtensa instruction-set architectures (ISA) to create the Diamond 330HiFi audio DSP. The new instructions work directly with 24-bit audio data types and allow the processor to more efficiently process audio data streams, which in turn allows the Diamond 330HiFi DSP to perform the same work at a lower clock rate and to therefore dissipate less power while executing the audio codecs.
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