Rollback partial wrong implemented code in pr #89

[EagleTw]

No description provided.

[EagleTw]

Suggestion in CWE-468
--> Always use array indexing instead of direct pointer manipulation.

I do not think there is a way to us array indexing here.

[gagachang]

How about using union:

union {
    uint32_t csr_time_32[2];
    uint64_t csr_time_64;
};

[EagleTw]

Hi @gagachang,

Maybe this new change has a better readability.
What do you think?

[gagachang]

Yes, it looks better. Minor suggestion:

rv->csr_time[0] = t & 0xFFFFFFFF;

Actually, I think two dedicated variables for time is OK, since rv32emu targets RV32 system.
The spec defines two CSRs for time on RV32 system.

uint32_t csr_time;
uint32_t csr_timeh;

[EagleTw]

Hi @gagachang
Thank you for your code review and suggestion