[Bug Report] SD bit in mstatus doesn't update when FS=11

rsd-devel / rsd

RSD: RISC-V Out-of-Order Superscalar Processor

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[Bug Report] SD bit in mstatus doesn't update when FS=11 #75

Open zhangkanqi opened 5 months ago

zhangkanqi commented 5 months ago

Hi,

After runing instruction csrs mstatus, a0(a0=0x00007800) in rsd, mstatus is set to 0x00007800, not the expected value 0x80007800.

According to the privilege specification of RISC-V, if FS=11, SD should be set to 1.

So I wonder is this a bug in rsd?

shioyadan commented 5 months ago

Your point seems correct, and we forgot to include the FS and XS bits in the floating point extension implementation. We will implement the feature.

I'm sorry for my late response. I would like to mention that I work at a university in Japan, and currently, we are in one of the busiest periods of the year due to many important events, such as the thesis defense and some important examinations. This has significantly limited my time to check everything...

zhangkanqi commented 4 months ago

It's not late at all. Thank you for taking the time to confirm and reply. Btw, Happy Chinese New Year~

shioyadan commented 4 months ago

Currently, I do not have enough time to fix this issue. To ensure it is not forgotten, I have reopened it. Once the issue is resolved, I will close it again. Thank you!