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613fa160e1
It was found that running libquantum on riscv-linux qemu produced an incorrect result. After investigation, FP registers are not saved during context switch due to incorrect mstatus.FS. In current implementation tb->flags merges all non-disabled state to dirty. This means the code in mark_fs_dirty in translate.c that handles initial and clean states is unreachable. This patch fixes it and is successfully tested with: libquantum Thanks to Richard for pointing out the actual bug. v3: remove the redundant condition v2: root cause FS problem Suggested-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: ShihPo Hung <shihpo.hung@sifive.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com> |
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