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Very-long-instruction-word (VLIW) architectures are widely adopted in high-performance and low-power digital signal processors (DSP) due to their simplicity from extensive software optimizations. However, their poor code density (usually > 2× code size for a given application) and corresponding instruction accesses can overwhelm the energy savings on DSP datapaths. This paper presents variable-length...
A fixed-width multiplier using the left-to-right algorithm for partial-product reduction is presented. The high-speed feature offered by this design is used to trade for low power. In one design, the proposed multiplier not only owns 8% speed improvement but also gains 14% power and 13% area reduction. When applying the voltage scaling to balance the speed, the power reduction is increased to 29%.
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