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Illegal Instruction overlap difference between vfwadd_wf and vwadd_wx #1766

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FariaaFaheem opened this issue Aug 8, 2024 · 1 comment
Open

Illegal Instruction overlap difference between vfwadd_wf and vwadd_wx #1766

FariaaFaheem opened this issue Aug 8, 2024 · 1 comment

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@FariaaFaheem
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FariaaFaheem commented Aug 8, 2024 •
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Why is vfwadd_wf v24, v24, ft10 illegal but vwadd_wx v24, v24, x2 legal?

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@aswaterman
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aswaterman commented Aug 9, 2024 •
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They're both legal.

I'm guessing that you either forgot to set mstatus.FS to nonzero, or you have vtype.vsew set to a value corresponding to an unsupported floating-point format.

EDIT: I now see mstatus.FS is nonzero in your code, so I'm guessing vtype.vsew is the culprit.

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@aswaterman @FariaaFaheem