📝Registers may occupy significant portion of die size in very small processors

prev: Number of CPU registers is primarily limited by ISA encoding size

Registers may occupy significant portion of die size in very small processors.

We have found that in the small RV32I core implementations, the upper 16 registers consume around one quarter of the total area of the core excluding memories, thus their removal saves around 25% core area with a corresponding core power reduction.
—Committee p.41

(This suggests that 32 registers occupy 50% of the core?)

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📝 Number of CPU registers is primarily limited by ISA encoding size