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Wrong opcode for CSR_MCYCLE, CSR_MTIME and CSR_MTIMEH #24

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Gianluke27 opened this issue Sep 23, 2023 · 0 comments
Open

Wrong opcode for CSR_MCYCLE, CSR_MTIME and CSR_MTIMEH #24

Gianluke27 opened this issue Sep 23, 2023 · 0 comments

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@Gianluke27
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According to the "ricv_privileged_spec" document on page 8 the instructions 0xC00, 0xC01 and 0xC80 refer to user-side instructions, while the machine-side instructions, i.e. mcycle, mtime and mcycleh are described on page 11 with the following opcodes: 0xB00, 0XB01, 0xB80.

In biriscv_defs on line 350 there are definitions to be modified.
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@Gianluke27