http://www.bdti.com/products/reports_shdsp.html

The first independent, in-depth report to evaluate the Hitachi SH-DSP and SH3-DSP, hybrid 16-bit fixed-point DSP/32-bit microcontroller architectures from Hitachi. This report provides a comprehensive qualitative analysis of the processors' architecture and features, along with a complete quantitative analysis based on results from BDTI's DSP benchmark suite. The performance of the SH-DSP and SH3-DSP is compared to that of key competitors, with benchmark results analyzed in terms of underlying architectural strengths and weaknesses.