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AR: Clarify unimplemented Sdtrig. #879

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3 changes: 3 additions & 0 deletions Sdext.tex
Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,9 @@ \chapter{Sdext (ISA Extension)}
implement everything described in this section that is not explicitly listed as
optional.

If Sdext is implemented and Sdtrig is not implemented, then accessing any of the
Sdtrig CSRs must raise an illegal instruction exception.

\section{Debug Mode} \label{debugmode}

Debug Mode is a special processor mode used only when a hart is halted for
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