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由 Zihao Yu 提交于
* If an RVC instruction is at the end of page boundary, we should not fetch 4 bytes. Otherwise, we may trigger an IPF when fetching the remaining 2 bytes at the beginning of the next page, which is inconsistent with the behavior of the RISC-V priviledged manual. * In such a case, we should first fetch 2 byte. If it is an RVC instruction, then execute it without fetching the remaining 2 bytes. If it is not an RVC instruciton, then fetching the remaining 2 bytes to obtain a 4-byte instruction.
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