C Extension: Decompressor, 16-Bit Fetch, and Misaligned 32-Bit Instructions
Part 21 of the RISC-V series. I built the C extension's decompressor and fetch buffer in Python and checked all 49,152 16-bit values and a real rv32imc program against objdump. 36.7% of executed instructions spanned two words, and the fetch buffer cut word reads from 33,771 to 23,903.
Sunhong'sSystem Blog
RISC-V