SiFive’s P870 Takes RISC-V Further

SiFive, an important player in the RISC-V scene, recently presented their P870 core at Hot Chips 2023. The P870 is a six-wide core with out-of-order execution and aims to achieve higher performance than previous SiFive designs. It includes modern features such as a decoupled branch predictor, non-scheduling queues, and vector execution capability. Notably, the P870 has a very short pipeline and competitive clock speeds that can go well into the 3 GHz range. SiFive’s P870 core is seen as a strong competitor to ARM’s Cortex X2 and AMD’s Zen 4c. However, one challenge for RISC-V is building a strong software ecosystem and gaining familiarity among users.

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