Add cautionary Zimop note

riscv · Oct 12, 2023 · 51e7d6f · 51e7d6f
1 parent 26defb3
commit 51e7d6f
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diff --git a/src/zimop.adoc b/src/zimop.adoc
@@ -19,6 +19,10 @@ corresponding extension.
 
 Although similar in some respects to HINTs, MOPs cannot be encoded as HINTs,
 because unlike HINTs, MOPs are allowed to alter architectural state.
+
+Because MOPs may be redefined by later extensions, standard software should
+not execute a MOP unless it is deliberately targeting an extension that has
+redefined that MOP.
 ====
 
 The Zimop extension defines 32 MOP instructions named MOP.R.__n__, where